HOLTEK HT46R067

HT46R064/065/066/0662/067
Enhanced A/D Type 8-Bit OTP MCU
Technical Document
· Application Note
- HA0075E MCU Reset and Oscillator Circuits Application Note
Features
CPU Features
· Table read instructions
· Operating voltage:
· 63 powerful instructions
· Up to 8-level subroutine nesting
fSYS= 4MHz: 2.2V~5.5V
fSYS= 8MHz: 3.0V~5.5V
fSYS= 12MHz: 4.5V~5.5V
· Bit manipulation instruction
· Low voltage reset function
· Up to 0.33ms instruction cycle with 12MHz system
· Wide range of available package types
clock at VDD= 5V
· Idle/Sleep mode and wake-up functions to reduce
Peripheral Features
power consumption
· Up to 42 bidirectional I/O lines
· Oscillator types:
· Up to 8 channel 12-bit ADC
External high freuency Crystal -- HXT
External RC -- ERC
Internal RC -- HIRC
External low frequency crystal -- LXT
· Up to 3 channel 8-bit PWM
· Software controlled 4-SCOM lines LCD driver with
1/2 bias
· Four operational modes: Normal, Slow, Idle, Sleep
· External interrupt input shared with an I/O line
· Fully integrated internal 4MHz, 8MHz and 12MHz
· Up to three 8-bit programmable Timer/Event
Counter with overflow interrupt and prescaler
oscillator requires no external components
· Watchdog Timer function
· Time-Base function
· LIRC oscillator function for watchdog timer
· Programmable Frequency Divider - PFD
· All instructions executed in one or two instruction
cycles
General Description
The Enhanced A/D MCUs are a series of 8-bit high performance, RISC architecture microcontrollers specifically designed for a wide range of applications. The
usual Holtek microcontroller features of low power consumption, I/O flexibility, timer functions, oscillator options, power down and wake-up functions, watchdog
timer and low voltage reset, combine to provide devices
with a huge range of functional options while still main-
Rev. 1.10
taining a high level of cost effectiveness. The fully integrated system oscillator HIRC, which requires no
external components and which has three frequency
selections, opens up a huge range of new application
possibilities for these devices, some of which may include industrial control, consumer products, household
appliances subsystem controllers, etc.
1
June 9, 2009
HT46R064/065/066/0662/067
Selection Table
Part No.
Program
Data
Memory Memory
I/O
8-bit Time HIRC RTC LCD
Timer Base (MHz) (LXT) SCOM
A/D
PWM
PFD Stack
Package
HT46R064
1K´14
64´8
18
1
1
4/8/12
Ö
¾
12-bit´4 8-bit´1
Ö
4
16DIP/NSOP,
20DIP/SOP/SSOP
HT46R065
2K´15
96´8
22
2
1
4/8/12
Ö
4
12-bit´4 8-bit´1
Ö
6
16DIP/NSOP,
20DIP/SOP/SSOP,
24SKDIP/SOP/SSOP
HT46R066
4K´15
128´8
26
2
1
4/8/12
Ö
4
12-bit´8 8-bit´2
Ö
6
16DIP/NSOP,
20DIP/SOP/SSOP,
24/28SKDIP/SOP/SSOP
HT46R0662
4K´15
224´8
42
2
1
4/8/12
Ö (*)
4
12-bit´8 8-bit´2
Ö
6
24/28SKDIP/SOP/SSOP,
44QFP
HT46R067
8K´16
384´8
42
3
1
4/8/12
Ö (*)
4
12-bit´8 8-bit´3
Ö
8
24/28SKDIP/SOP/SSOP,
44QFP
Note: ²*² the oscillator is connected to the XT1/XT2 pins with TinyPowerTM design.
Block Diagram
The following block diagram illustrates the main functional blocks.
T im in g
G e r n e r a tio n
L C D
S C O M
P W M
D r iv e r
P F D
D r iv e r
I/O
P o rts
8 - b it
R IS C
M C U
C o re
A /D
C o n v e rte r
Rev. 1.10
T im e
B a s e
T im e r
2
R O M /R A M
M e m o ry
June 9, 2009
HT46R064/065/066/0662/067
Pin Assignment
P A 3 /IN T /A N 3
1
2 0
P A 4 /P W M 0
P A 2 /T C 0 /A N 2
2
1 9
P A 5 /O S C 2
P A 3 /IN T /A N 3
1
1 6
P A 4 /P W M 0
P A 1 /P F D /A N 1
3
1 8
P A 6 /O S C 1
P A 3 /IN T /A N 3
1
1 6
P A 4 /P W M 0 /T C 1
P A 2 /T C 0 /A N 2
2
1 5
P A 5 /O S C 2
P A 0 /A N 0
4
1 7
P A 7 /R E S
P A 2 /T C 0 /A N 2
2
1 5
P A 5 /O S C 2
P A 1 /P F D /A N 1
3
1 4
P A 6 /O S C 1
V S S
5
1 6
V D D
P A 1 /P F D /A N 1
3
1 4
P A 6 /O S C 1
P A 0 /A N 0
4
1 3
P A 7 /R E S
P C 0
6
1 5
P C 3
P A 0 /A N 0
4
1 3
P A 7 /R E S
V S S
5
1 2
V D D
P C 1
7
1 4
P C 2
V S S
5
1 2
V D D
P B 0
6
1 1
P B 5
P B 0
8
1 3
P B 5
P B 0 /S C O M 0
6
1 1
P B 5
P B 1
7
1 0
P B 4
P B 1
9
1 2
P B 4
P B 1 /S C O M 1
7
1 0
P B 4
P B 2
8
9
P B 3
P B 2
1 0
1 1
P B 3
P B 2 //S C O M 2
8
9
H T 4 6 R 0 6 4
1 6 D IP -A /N S O P -A
H T 4 6 R 0 6 4
2 0 D IP -A /S O P -A /S S O P -A
P A 3 /IN T /A N 3
1
2 4
P A 4 /P W M 0 /T C 1
P A 2 /T C 0 /A N 2
2
2 3
P A 5 /O S C 2
P A 1 /P F D /A N 1
3
2 2
P A 6 /O S C 1
P B 3 /S C O M 3
H T 4 6 R 0 6 5
1 6 D IP -A /N S O P -A
P A 3 /IN T /A N 3
1
2 0
P A 4 /P W M 0 /T C 1
P A 2 /T C 0 /A N 2
2
1 9
P A 5 /O S C 2
P A 0 /A N 0
4
2 1
P A 7 /R E S
P A 1 /P F D /A N 1
3
1 8
P A 6 /O S C 1
V S S
5
2 0
V D D
P A 3 /IN T /A N 3
1
1 6
P A 4 /P W M 0 /T C 1
P A 0 /A N 0
4
1 7
P A 7 /R E S
P C 6
6
1 9
P C 5
P A 2 /T C 0 /A N 2
2
1 5
P A 5 /O S C 2
V S S
5
1 6
V D D
P C 7
7
1 8
P C 4
P A 1 /P F D /A N 1
3
1 4
P A 6 /O S C 1
P C 0
6
1 5
P C 3
P C 0
8
1 7
P C 3
P A 0 /A N 0
4
1 3
P A 7 /R E S
P C 1
7
1 4
P C 2
P C 1
9
1 6
P C 2
V S S
5
1 2
V D D
P B 0 /S C O M 0
8
1 3
P B 5
P B 0 /S C O M 0
1 0
1 5
P B 5
P B 0 /S C O M 0
6
1 1
P C 3 /P W M 1
P B 1 /S C O M 1
9
1 2
P B 4
P B 1 /S C O M 1
1 1
1 4
P B 4
P B 1 /S C O M 1
7
1 0
P B 4
P B 2 //S C O M 2
1 0
1 1
P B 3 /S C O M 3
P B 2 //S C O M 2
1 2
1 3
P B 3 /S C O M 3
P B 2 //S C O M 2
8
9
H T 4 6 R 0 6 5
2 0 D IP -A /S O P -A /S S O P -A
P B 3 /S C O M 3
H T 4 6 R 0 6 6
1 6 D IP -A /N S O P -A
H T 4 6 R 0 6 5
2 4 S K D IP -A /S O P -A /S S O P -A
P A 3 /IN T /A N 3
1
2 8
P A 4 /P W M 0 /T C 1
P A 2 /T C 0 /A N 2
2
2 7
P A 5 /O S C 2
P A 1 /P F D /A N 1
3
2 6
P A 6 /O S C 1
P A 3 /IN T /A N 3
1
2 4
P A 4 /P W M 0 /T C 1
P A 2 /T C 0 /A N 2
2
2 3
P A 5 /O S C 2
P A 0 /A N 0
4
2 5
P A 7 /R E S
P A 1 /P F D /A N 1
3
2 2
P A 6 /O S C 1
V S S
5
2 4
V D D
P A 3 /IN T /A N 3
1
2 0
P A 4 /P W M 0 /T C 1
P A 2 /T C 0 /A N 2
2
1 9
P A 5 /O S C 2
P A 0 /A N 0
4
2 1
P A 7 /R E S
P C 6 /A N 6
6
2 3
P C 5
P A 1 /P F D /A N 1
3
1 8
P A 6 /O S C 1
V S S
5
2 0
V D D
P C 7 /A N 7
7
2 2
P C 4
P A 0 /A N 0
4
1 7
P A 7 /R E S
P C 6 /A N 6
6
1 9
P C 5
P C 0 /A N 4
8
2 1
P C 3 /P W M 1
V S S
5
1 6
V D D
P C 7 /A N 7
7
1 8
P C 4
P C 1 /A N 5
9
2 0
P C 2
P C 0 /A N 4
6
1 5
P C 3 /P W M 1
P C 0 /A N 4
8
1 7
P C 3 /P W M 1
P D 0
1 0
1 9
P D 3
P C 1 /A N 5
7
1 4
P C 2
P C 1 /A N 5
9
1 6
P C 2
P D 1
1 1
1 8
P D 2
P B 0 /S C O M 0
8
1 3
P B 5 /[IN T ]
P B 0 /S C O M 0
1 0
1 5
P B 5 /[IN T ]
P B 0 /S C O M 0
1 2
1 7
P B 5 /[IN T ]
P B 1 /S C O M 1
9
1 2
P B 4 /[T C 0 ]
P B 1 /S C O M 1
1 1
1 4
P B 4 /[T C 0 ]
P B 1 /S C O M 1
1 3
1 6
P B 4 /[T C 0 ]
P B 2 //S C O M 2
1 0
1 1
P B 3 /S C O M 3 /[P F D ]
P B 2 //S C O M 2
1 2
1 3
P B 3 /S C O M 3 /[P F D ]
P B 2 //S C O M 2
1 4
1 5
P B 3 /S C O M 3 /[P F D ]
H T 4 6 R 0 6 6
2 0 D IP -A /S O P -A /S S O P -A
Rev. 1.10
H T 4 6 R 0 6 6
2 4 S K D IP -A /S O P -A /S S O P -A
3
H T 4 6 R 0 6 6
2 8 S K D IP -A /S O P -A /S S O P -A
June 9, 2009
HT46R064/065/066/0662/067
1
2 4
P A 4 /P W M 0 /T C 1
2
2 3
P A 5 /O S C 2
D D
E S
C 1
C 2
C 1
N 3
N 2
N 1
N 0
S S
N 6
P A 1 /P F D /A N 1
3
2 2
P A 6 /O S C 1
P A 0 /A N 0
4
2 1
P A 7 /R E S
V S S
5
2 0
V D D
P C 6 /A N 6
6
1 9
P C 5 /X T 1
P C 7 /A N 7
7
1 8
P C 4 /X T 2
P C 0 /A N 4
8
1 7
P C 3 /P W M 1
P C 1 /A N 5
9
1 6
P C 2
P B 0 /S C O M 0
1 0
1 5
P B 5 /[IN T ]
P B 1 /S C O M 1
1 1
1 4
P B 4 /[T C 0 ]
P B 2 //S C O M 2
1 2
1 3
P B 3 /S C O M 3 /[P F D ]
4 4 4 3 4 2 4 1 4 0 3 9 3 8 3 7 3 6 3 5 3 4
7
1
5
2
3 2
3
3 1
4
3 0
4
0
V
P A 7 /R
P A 6 /O S
P A 5 /O S
P A 4 /P W M 0 /T
P A 3 /IN T /A
P A 2 /T C 0 /A
P A 1 /P F D /A
P A 0 /A
V
P C 6 /A
P C 7 /A N
P C 0 /A N
P C 1 /A N
P E
P E
P E
P E
P E
P E
P E
P E
P A 3 /IN T /A N 3
P A 2 /T C 0 /A N 2
1
5
6
3
7
4
7
6
5
2 9
H T 4 6 R 0 6 6 2
4 4 Q F P -A
2
3 3
2 8
2 7
8
2 6
9
2 5
1 0
2 4
1 1
2 3
1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2
P C 5 /X T 1
P C 4 /X T 2
P C 3 /P W M 1
P C 2
P D 7
P D 6
P D 5
P D 4
P D 3
P D 2
P F 1
P F 0
P B 7
P B 6
P B 5
P B 4
P B 3
P B 2
P B 1
P B 0
P D 1
P D 0
H T 4 6 R 0 6 6 2
2 4 S K D IP -A /S O P -A /S S O P -A
/[IN
/[T C
/S C
/S C
/S C
/S C
T ]
0 ]
O M 3 /[P F D ]
O M 2
O M 1
O M 0
2 8
P A 4 /P W M 0 /T C 1
2
2 7
P A 5 /O S C 2
P A 1 /P F D /A N 1
3
2 6
P A 6 /O S C 1
P A 0 /A N 0
4
2 5
P A 7 /R E S
V S S
5
2 4
V D D
P C 6 /A N 6
6
2 3
P C 5 /X T 1
P C 7 /A N 7
7
2 2
P C 4 /X T 2
P C 0 /A N 4
8
2 1
P C 3 /P W M 1
P C 1 /A N 5
9
2 0
P C 2
P D 0
1 0
1 9
P D 3
P D 1
1 1
1 8
P D 2
P B 0 /S C O M 0
1 2
1 7
P B 5 /[IN T ]
P B 1 /S C O M 1
1 3
1 6
P B 4 /[T C 0 ]
P B 2 //S C O M 2
1 4
1 5
P B 3 /S C O M 3 /[P F D ]
D D
E S
C 1
C 2
C 1
N 3
N 2
N 1
N 0
S S
N 6
1
V
P A 7 /R
P A 6 /O S
P A 5 /O S
P A 4 /P W M 0 /T
P A 3 /IN T /A
P A 2 /T C 0 /A
P A 1 /P F D /A
P A 0 /A
V
P C 6 /A
P A 3 /IN T /A N 3
P A 2 /T C 0 /A N 2
P C 7 /A N
P C 0 /A N
P C 1 /A N
P E
P E
P E
P E
P E
P E
P E
P E
5
3 3
4
2
3 2
0
3
3 1
4
3 0
1
5
3
7
5
2 9
H T 4 6 R 0 6 7
4 4 Q F P -A
6
4
8
2 6
9
2 5
7
6
2
2 8
2 7
1 0
1 1
2 4
1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2
2 3
P C 5
P C 4
P C 3
P C 2
P D 7
P D 6
P D 5
P D 4
P D 3
P D 2
P F 1
/X T
/X T
/P W
/P W
1
2
M 1
M 2
/T C 2
P F 0
P B 7
P B 6
P B 5
P B 4
P B 3
P B 2
P B 1
P B 0
P D 1
P D 0
H T 4 6 R 0 6 6 2
2 8 S K D IP -A /S O P -A /S S O P -A
1
4 4 4 3 4 2 4 1 4 0 3 9 3 8 3 7 3 6 3 5 3 4
7
/[IN
/[T C
/S C
/S C
/S C
/S C
T ]
0 ]
O M 3 /[P F D ]
O M 2
O M 1
O M 0
P A 3 /IN T /A N 3
1
2 8
P A 4 /P W M 0 /T C 1
P A 2 /T C 0 /A N 2
2
2 7
P A 5 /O S C 2
P A 1 /P F D /A N 1
3
2 6
P A 6 /O S C 1
P A 3 /IN T /A N 3
1
2 4
P A 4 /P W M 0 /T C 1
P A 2 /T C 0 /A N 2
2
2 3
P A 5 /O S C 2
P A 0 /A N 0
4
2 5
P A 7 /R E S
P A 1 /P F D /A N 1
3
2 2
P A 6 /O S C 1
V S S
5
2 4
V D D
P A 0 /A N 0
4
2 1
P A 7 /R E S
P C 6 /A N 6
6
2 3
P C 5 /X T 1
V S S
5
2 0
V D D
P C 7 /A N 7
7
2 2
P C 4 /X T 2
P C 6 /A N 6
6
1 9
P C 5 /X T 1
P C 0 /A N 4
8
2 1
P C 3 /P W M 1
P C 7 /A N 7
7
1 8
P C 4 /X T 2
P C 1 /A N 5
9
2 0
P C 2 /P W M 2
P C 0 /A N 4
8
1 7
P C 3 /P W M 1
P D 0
1 0
1 9
P D 3
P C 1 /A N 5
9
1 6
P C 2 /P W M 2
P D 1
1 1
1 8
P D 2 /T C 2
P B 0 /S C O M 0
1 0
1 5
P B 5 /[IN T ]
P B 0 /S C O M 0
1 2
1 7
P B 5 /[IN T ]
P B 1 /S C O M 1
1 1
1 4
P B 4 /[T C 0 ]
P B 1 /S C O M 1
1 3
1 6
P B 4 /[T C 0 ]
P B 2 //S C O M 2
1 2
1 3
P B 3 /S C O M 3 /[P F D ]
P B 2 //S C O M 2
1 4
1 5
P B 3 /S C O M 3 /[P F D ]
H T 4 6 R 0 6 7
2 4 S K D IP -A /S O P -A /S S O P -A
H T 4 6 R 0 6 7
2 8 S K D IP -A /S O P -A /S S O P -A
Note: Bracketed pin names indicate non-default pinout remapping locations.
Rev. 1.10
4
June 9, 2009
HT46R064/065/066/0662/067
Pin Description
HT46R064
Pin Name
Function
OPT
I/T
PA0
PAPU
PAWK
ST
AN0
ADCR
AN
PA1
PAPU
PAWK
ST
CMOS General purpose I/O. Register enabled pull-up and wake-up.
PFD
CTRL0
¾
CMOS PFD output
AN1
ADCR
AN
PA2
PAPU
PAWK
ST
TC0
¾
ST
¾
External Timer 0 clock input
AN2
ADCR
AN
¾
A/D channel 2
PA3
PAPU
PAWK
ST
INT
¾
ST
¾
External interrupt input
AN3
ADCR
AN
¾
A/D channel 3
PA4
PAPU
PAWK
ST
CMOS General purpose I/O. Register enabled pull-up and wake-up.
PWM0
CTRL0
¾
CMOS PWM output
PA5
PAPU
PAWK
ST
CMOS General purpose I/O. Register enabled pull-up and wake-up.
OSC2
CO
¾
PA6
PAPU
PAWK
ST
OSC1
CO
OSC
PA7
PAWK
ST
RES
CO
ST
PA0/AN0
PA1/PFD/AN1
PA2/TC0/AN2
PA3/INT/AN3
PA4/PWM0
PA5/OSC2
PA6/OSC1
PA7/RES
O/T
Description
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
¾
A/D channel 0
A/D channel 1
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
OSC
Oscillator pin
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
Oscillator pin
NMOS General purpose I/O. Register enabled wake-up.
¾
Reset input
PB0~PB5
PBn
PBPU
ST
CMOS General purpose I/O. Register enabled pull-up.
PC0~PC3
PCn
PCPU
ST
CMOS General purpose I/O. Register enabled pull-up.
VDD
VDD
¾
PWR
¾
Power supply
VSS
VSS
¾
PWR
¾
Ground
Note:
I/T: Input type; O/T: Output type
OPT: Optional by configuration option (CO) or register option
PWR: Power; CO: Configuration option
ST: Schmitt Trigger input; CMOS: CMOS output; AN: analog input
SCOM= software controlled LCD COM
HXT: High frequency crystal oscillator
LXT: Low frequency crystal oscillator
Rev. 1.10
5
June 9, 2009
HT46R064/065/066/0662/067
HT46R065
Pin Name
PA0/AN0
PA1/PFD/AN1
PA2/TC0/AN2
PA3/INT/AN3
PA4/TC1/PWM0
PA5/OSC2
PA6/OSC1
PA7/RES
PB0/SCOM0
PB1/SCOM1
PB2/SCOM2
PB3/SCOM3
Function
OPT
I/T
PA0
PAPU
PAWK
O/T
Description
ST
AN0
ADCR
AN
PA1
PAPU
PAWK
ST
CMOS General purpose I/O. Register enabled pull-up and wake-up.
PFD
CTRL0
¾
CMOS PFD output
AN1
ADCR
AN
PA2
PAPU
PAWK
ST
TC0
¾
ST
¾
External Timer 0 clock input
AN2
ADCR
AN
¾
A/D channel 2
PA3
PAPU
PAWK
ST
INT
¾
ST
¾
External interrupt input
AN3
ADCR
AN
¾
A/D channel 3
PA4
PAPU
PAWK
ST
TC1
¾
ST
PWM0
CTRL0
¾
CMOS PWM output
PA5
PAPU
PAWK
ST
CMOS General purpose I/O. Register enabled pull-up and wake-up.
OSC2
CO
¾
PA6
PAPU
PAWK
ST
OSC1
CO
OSC
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
¾
A/D channel 0
A/D channel 1
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
OSC
External Timer 1 clock input
Oscillator pin
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
Oscillator pin
PA7
PAWK
ST
RES
CO
ST
PB0
PBPU
ST
CMOS General purpose I/O. Register enabled pull-up.
¾
SCOM Software controlled 1/2 bias LCD COM
SCOM0 SCOMC
PB1
PBPU
SCOM1 SCOMC
PB2
PBPU
SCOM2 SCOMC
PB3
PBPU
SCOM3 SCOMC
NMOS General purpose I/O. Register enabled wake-up.
¾
Reset input
ST
CMOS General purpose I/O. Register enabled pull-up.
¾
SCOM Software controlled 1/2 bias LCD COM
ST
CMOS General purpose I/O. Register enabled pull-up.
¾
SCOM Software controlled 1/2 bias LCD COM
ST
CMOS General purpose I/O. Register enabled pull-up.
¾
SCOM Software controlled 1/2 bias LCD COM
PB4, PB5
PBn
PBPU
ST
CMOS General purpose I/O. Register enabled pull-up.
PC0~PC7
PCn
PCPU
ST
CMOS General purpose I/O. Register enabled pull-up.
VDD
VDD
¾
PWR
¾
Power supply
VSS
VSS
¾
PWR
¾
Ground
Note:
I/T: Input type; O/T: Output type
OPT: Optional by configuration option (CO) or register option
PWR: Power; CO: Configuration option
ST: Schmitt Trigger input; CMOS: CMOS output; AN: analog input
SCOM: Software controlled LCD COM
HXT: High frequency crystal oscillator
LXT: Low frequency crystal oscillator
Rev. 1.10
6
June 9, 2009
HT46R064/065/066/0662/067
HT46R066
Pin Name
Function
OPT
I/T
PA0
PAPU
PAWK
ST
AN0
ADCR
AN
PA1
PAPU
PAWK
ST
CMOS General purpose I/O. Register enabled pull-up and wake-up.
PFD
CTRL0
¾
CMOS PFD output
AN1
ADCR
AN
PA2
PAPU
PAWK
ST
TC0
¾
ST
¾
External Timer 0 clock input
AN2
ADCR
AN
¾
A/D channel 2
PA3
PAPU
PAWK
ST
INT
¾
ST
¾
External interrupt input
AN3
ADCR
AN
¾
A/D channel 3
PA4
PAPU
PAWK
ST
TC1
¾
ST
PWM0
CTRL0
¾
CMOS PWM output
PA5
PAPU
PAWK
ST
CMOS General purpose I/O. Register enabled pull-up and wake-up.
OSC2
CO
¾
PA6
PAPU
PAWK
ST
OSC1
CO
OSC
PA7
PAWK
ST
RES
CO
ST
PB0
PBPU
ST
PA0/AN0
PA1/PFD/AN1
PA2/TC0/AN2
PA3/INT/AN3
PA4/TC1/PWM0
PA5/OSC2
PA6/OSC1
PA7/RES
PB0/SCOM0
SCOM0 SCOMC
PB1
PBPU
PB1/SCOM1
SCOM1 SCOMC
PB2
PBPU
PB2/SCOM2
SCOM2 SCOMC
PB3/[PFD]/SCOM3
Description
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
¾
A/D channel 0
A/D channel 1
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
OSC
External Timer 1 clock input
Oscillator pin
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
Oscillator pin
NMOS General purpose I/O. Register enabled wake-up.
¾
Reset input
CMOS General purpose I/O. Register enabled pull-up.
¾
SCOM Software controlled 1/2 bias LCD COM
ST
CMOS General purpose I/O. Register enabled pull-up.
¾
SCOM Software controlled 1/2 bias LCD COM
ST
CMOS General purpose I/O. Register enabled pull-up.
¾
SCOM Software controlled 1/2 bias LCD COM
PB3
PBPU
ST
CMOS General purpose I/O. Register enabled pull-up.
PFD
CTRL0
¾
CMOS PFD output
SCOM3 SCOMC
¾
SCOM Software controlled 1/2 bias LCD COM
CMOS General purpose I/O. Register enabled pull-up.
PBn
PBPU
ST
TC0
CTRL0
ST
PBn
PBPU
ST
INT
CTRL0
ST
PB4/[TC0]
PB5/[INT]
Rev. 1.10
O/T
¾
External Timer 0 clock input
CMOS General purpose I/O. Register enabled pull-up.
¾
External interrupt input
7
June 9, 2009
HT46R064/065/066/0662/067
Pin Name
Function
OPT
I/T
PC0/AN4
PC1/AN5
PC6/AN6
PC7/AN7
PCn
PCPU
ST
ANn
ADCR
AN
PC2, PC4~PC5
PCn
PCPU
ST
CMOS General purpose I/O. Register enabled pull-up.
PCn
PCPU
ST
CMOS General purpose I/O. Register enabled pull-up.
PWM1
CTRL0
¾
CMOS PWM output
PD0~PD3
PDn
PDPU
ST
CMOS General purpose I/O. Register enabled pull-up.
VDD
VDD
¾
PWR
¾
Power supply
VSS
VSS
¾
PWR
¾
Ground
PC3/PWM1
Note:
O/T
Description
CMOS General purpose I/O. Register enabled pull-up.
¾
A/D channel 4, 5, 6, 7
I/T: Input type; O/T: Output type
OPT: Optional by configuration option (CO) or register option
PWR: Power; CO: Configuration option
ST: Schmitt Trigger input; CMOS: CMOS output; AN: analog input
SCOM: Software controlled LCD COM
HXT: High frequency crystal oscillator
LXT: Low frequency crystal oscillator
HT46R0662, HT46R067
Pin Name
Function
OPT
I/T
PA0
PAPU
PAWK
ST
AN0
ADCR
AN
PA1
PAPU
PAWK
ST
CMOS General purpose I/O. Register enabled pull-up and wake-up.
PFD
CTRL0
¾
CMOS PFD output
AN1
ADCR
AN
PA2
PAPU
PAWK
ST
TC0
¾
ST
¾
External Timer 0 clock input
AN2
ADCR
AN
¾
A/D channel 2
PA3
PAPU
PAWK
ST
INT
¾
ST
¾
External interrupt input
AN3
ADCR
AN
¾
A/D channel 3
PA4
PAPU
PAWK
ST
TC1
¾
ST
PWM0
CTRL0
¾
CMOS PWM output
PA5
PAPU
PAWK
ST
CMOS General purpose I/O. Register enabled pull-up and wake-up.
OSC2
CO
¾
PA6
PAPU
PAWK
ST
OSC1
CO
OSC
PA0/AN0
PA1/PFD/AN1
PA2/TC0/AN2
PA3/INT/AN3
PA4/TC1/PWM0
PA5/OSC2
PA6/OSC1
Rev. 1.10
O/T
Description
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
¾
A/D channel 0
A/D channel 1
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
OSC
External Timer 1 clock input
Oscillator pin
CMOS General purpose I/O. Register enabled pull-up and wake-up.
¾
Oscillator pin
8
June 9, 2009
HT46R064/065/066/0662/067
Pin Name
PA7/RES
PB0/SCOM0
Function
OPT
I/T
PA7
PAWK
ST
RES
CO
ST
PB0
PBPU
ST
CMOS General purpose I/O. Register enabled pull-up.
¾
SCOM Software controlled 1/2 bias LCD COM
SCOM0 SCOMC
PB1
PB1/SCOM1
PB2
PB2/SCOM2
PB3/[PFD]/SCOM3
PB4/[TC0]
PB5/[INT]
PBPU
SCOM1 SCOMC
PBPU
SCOM2 SCOMC
O/T
Description
NMOS General purpose I/O. Register enabled wake-up.
¾
Reset input
ST
CMOS General purpose I/O. Register enabled pull-up.
¾
SCOM Software controlled 1/2 bias LCD COM
ST
CMOS General purpose I/O. Register enabled pull-up.
¾
SCOM Software controlled 1/2 bias LCD COM
CMOS General purpose I/O. Register enabled pull-up.
PB3
PBPU
ST
PFD
CTRL0
¾
CMOS PFD output
SCOM3 SCOMC
¾
SCOM Software controlled 1/2 bias LCD COM
PBn
PBPU
ST
CMOS General purpose I/O. Register enabled pull-up.
TC0
CTRL0
ST
PBn
PBPU
ST
¾
External Timer 0 clock input
CMOS General purpose I/O. Register enabled pull-up.
¾
INT
CTRL0
ST
PB6~PB7
PBn
PBPU
ST
CMOS General purpose I/O. Register enabled pull-up.
PC0/AN4
PC1/AN5
PC6/AN6
PC7/AN7
PCn
PCPU
ST
CMOS General purpose I/O. Register enabled pull-up.
ANn
ADCR
AN
PCn
PCPU
ST
CMOS General purpose I/O. Register enabled pull-up.
PWM2
CTRL2
¾
CMOS PWM output - HT46R0662 doesn¢t have PWM2
PC2/PWM2
¾
External interrupt input
A/D channel 4, 5, 6, 7
PCn
PCPU
ST
CMOS General purpose I/O. Register enabled pull-up.
PWM1
CTRL1
¾
CMOS PWM output
PCn
PCPU
ST
CMOS General purpose I/O. Register enabled pull-up.
XT2
CO
¾
PCn
PCPU
ST
XT1
CO
¾
PDn
PDPU
ST
CMOS General purpose I/O. Register enabled pull-up.
PDn
PDPU
ST
CMOS General purpose I/O. Register enabled pull-up.
TC2
¾
ST
PE0~PE7
PEn
PEPU
ST
CMOS General purpose I/O. Register enabled pull-up.
PF0, PF1
PFn
PFPU
ST
CMOS General purpose I/O. Register enabled pull-up.
VDD
VDD
¾
PWR
¾
Power supply
VSS
VSS
¾
PWR
¾
Ground
PC3/PWM1
PC4/XT2
PC5/XT1
PD0, PD1
PD3~PD7
PD2/TC2
Note:
LXT
Low frequency crystal pin
CMOS General purpose I/O. Register enabled pull-up.
LXT
¾
Low frequency crystal pin
External Timer 2 clock input - HT46R0662 doesn¢t have TC2
I/T: Input type; O/T: Output type
OPT: Optional by configuration option (CO) or register option
PWR: Power; CO: Configuration option
ST: Schmitt Trigger input; CMOS: CMOS output; AN: analog input
SCOM: Software controlled LCD COM
HXT: High frequency crystal oscillator
LXT: Low frequency crystal oscillator
Rev. 1.10
9
June 9, 2009
HT46R064/065/066/0662/067
Absolute Maximum Ratings
Supply Voltage ...........................VSS-0.3V to VSS+6.0V
Storage Temperature ............................-50°C to 125°C
Input Voltage..............................VSS-0.3V to VDD+0.3V
IOL Total ..............................................................100mA
Total Power Dissipation .....................................500mW
Operating Temperature...........................-40°C to 85°C
IOH Total............................................................-100mA
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed
in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
D.C. Characteristics
Symbol
VDD
IDD1
IDD2
IDD3
IDD4
Parameter
Operating Voltage
Ta=25°C
Test Conditions
¾
ISTB2
Max.
Unit
fSYS=4MHz
2.2
¾
5.5
V
fSYS=8MHz
3.0
¾
5.5
V
fSYS=12MHz
4.5
¾
5.5
V
¾
0.8
1.2
mA
3V
5V
¾
1.5
2.25
mA
Operating Current
(HXT, HIRC, ERC)
3V
¾
1.4
2.1
mA
¾
2.8
4.2
mA
Operating Current
(HXT, HIRC, ERC)
Operating Current
(HIRC + LXT, Slow Mode)
Standby Current
(LIRC On, LXT Off)
Standby Current
(LIRC Off, LXT Off)
Standby Current
(LIRC Off, LXT On, LXTLP=1)
No load, fSYS=4MHz
No load, fSYS=8MHz
5V
5V
No load, fSYS=12MHz
¾
4
6
mA
3V
No load, fSYS=32768Hz
(LXT on OSC1/OSC2,
LVR disabled, LXTLP=1)
¾
5
10
mA
¾
12
24
mA
No load, fSYS=32768Hz
(LXT on XT1/XT2,
LVR disabled, LXTLP=1)
¾
5
10
mA
¾
10
20
mA
¾
¾
5
mA
5V
¾
¾
10
mA
3V
¾
¾
1
mA
¾
¾
2
mA
¾
¾
5
mA
¾
¾
10
mA
¾
¾
3
mA
¾
¾
5
mA
5V
3V
3V
No load, system HALT
No load, system HALT
5V
3V
ISTB3
Typ.
Conditions
Operating Current
(HXT, HIRC, ERC)
5V
ISTB1
Min.
VDD
5V
3V
5V
No load, system HALT
(LXT on OSC1/OSC2)
No load, system HALT
(LXT on XT1/XT2)
VIL1
Input Low Voltage for I/O,
TCn and INT
¾
¾
0
¾
0.3VDD
V
VIH1
Input High Voltage for I/O,
TCn and INT
¾
¾
0.7VDD
¾
VDD
V
VIL2
Input Low Voltage (RES)
¾
¾
0
¾
0.4VDD
V
VIH2
Input High Voltage (RES)
¾
¾
0.9VDD
¾
VDD
V
VLVR1
Low Voltage Reset 1
¾
VLVR = 4.2V
3.98
4.2
4.42
V
VLVR2
Low Voltage Reset 2
¾
VLVR = 3.15V
2.98
3.15
3.32
V
VLVR3
Low Voltage Reset 3
¾
VLVR = 2.1V
1.98
2.1
2.22
V
Rev. 1.10
10
June 9, 2009
HT46R064/065/066/0662/067
Ta=25°C
Symbol
IOL1
IOH
Parameter
I/O Port Sink Current
(PA, PB, PC)
Test Conditions
VDD
3V
Conditions
VOL=0.1VDD
5V
3V
I/O Port Source Current
VOH=0.9VDD
5V
IOL2
PA7 Sink Current
RPH
Pull-high Resistance
ISCOM
VSCOM
SCOM Operating Current
VDD/2 Voltage for LCD COM
5V
VOL=0.1VDD
Min.
Typ.
Max.
Unit
4
8
¾
mA
10
20
¾
mA
-2
-4
¾
mA
-5
-10
¾
mA
2
3
¾
mA
3V
¾
20
60
100
kW
5V
¾
10
30
50
kW
SCOMC, ISEL[1:0]=00
17.5
25.0
32.5
mA
SCOMC, ISEL[1:0]=01
35
50
65
mA
SCOMC, ISEL[1:0]=10
70
100
130
mA
SCOMC, ISEL[1:0]=11
140
200
260
mA
0.475
0.500
0.525
VDD
5V
5V
No load
Note: The standby current (ISTB1~ISTB3) and IDD4 are measured with all I/O pins in input mode and tied to VDD.
A.C. Characteristics
Symbol
fSYS
Parameter
System Clock
Ta=25°C
Test Conditions
Min.
Typ.
Max.
Unit
2.2V~5.5V
32
¾
4000
kHz
3.0V~5.5V
32
¾
8000
kHz
4.5V~5.5V
32
¾
12000
kHz
3V/5V Ta=25°C
-2%
4
+2%
MHz
3V/5V Ta=25°C
-2%
8
+2%
MHz
-2%
12
+2%
MHz
3V/5V Ta=0~70°C
-5%
4
+5%
MHz
3V/5V Ta=0~70°C
-5%
8
+5%
MHz
VDD
¾
5V
fHIRC
Rev. 1.10
Ta=25°C
Ta=0~70°C
-5%
12
+5%
MHz
2.2V~
Ta=0~70°C
3.6V
-8%
4
+8%
MHz
3.0V~
Ta=0~70°C
5.5V
-8%
4
+8%
MHz
3.0V~
Ta=0~70°C
5.5V
-8%
8
+8%
MHz
4.5V~
Ta=0~70°C
5.5V
-8%
12
+8%
MHz
2.2V~
Ta= -40°C~85°C
3.6V
-12%
4
+12%
MHz
3.0V~
Ta= -40°C~85°C
5.5V
-12%
4
+12%
MHz
3.0V~
Ta= -40°C~85°C
5.5V
-12%
8
+12%
MHz
4.5V~
Ta= -40°C~85°C
5.5V
-12%
12
+12%
MHz
5V
System Clock
(HIRC)
Conditions
11
June 9, 2009
HT46R064/065/066/0662/067
Ta=25°C
Symbol
Parameter
System Clock
(ERC)
fERC
fLXT
System Clock (LXT)
fTIMER
Timer Input Frequency
(TCn)
fLIRC
Test Conditions
VDD
Conditions
External Reset Low Pulse Width
Typ.
Max.
Unit
5V
Ta=25°C, R=120kW *
-2%
4
+2%
MHz
5V
Ta=0~70°C, R=120kW *
-5%
4
+5%
MHz
5V
Ta= -40°C~85°C,
R=120kW *
-7%
4
+7%
MHz
2.2V~ Ta= -40°C~85°C,
5.5V R=120kW *
-11%
4
+11%
MHz
¾
32768
¾
Hz
2.2V~5.5V
0
¾
4000
kHz
3.0V~5.5V
0
¾
8000
kHz
4.5V~5.5V
0
¾
12000
kHz
¾
¾
¾
3V
¾
5
10
15
kHz
5V
¾
6.5
13
19.5
kHz
¾
¾
1
¾
¾
ms
¾
1024
¾
tSYS
¾
2
¾
tSYS
¾
1024
¾
tSYS
LIRC Oscillator
tRES
Min.
For HXT/LXT
tSST
System Start-up time Period
¾
For ERC/IRC
(By configuration option)
tINT
Interrupt Pulse Width
¾
¾
1
¾
¾
ms
tLVR
Low Voltage Width to Reset
¾
¾
0.25
1
2
ms
RESTD
Reset Delay Time
¾
¾
¾
100
¾
ms
Note:
1. tSYS=1/fSYS
2. *For fERC, as the resistor tolerance will influence the frequency a precision resistor is recommended.
3. For the HT46R065 devices, the fERC parameter is not applicable.
4. To maintain the accuracy of the internal HIRC oscillator frequency, a 0.1mF decoupling capacitor should
be connected between VDD and VSS and located as close to the device as possible.
ADC Characteristics
Ta=25°C
Test Conditions
Symbol
Parameter
Min.
Typ.
Max.
Unit
tAD=0.5ms
-2
¾
2
LSB
tAD=0.5ms
-4
¾
4
LSB
¾
0.5
0.75
mA
¾
1.0
1.5
mA
VDD
3V
DNL
A/C Differential Non-Linearity
5V
3V
INL
ADC Integral Non-Linearity
5V
IADC
Rev. 1.10
Additional Power Consumption
if A/D Converter is Used
Conditions
3V
¾
5V
12
June 9, 2009
HT46R064/065/066/0662/067
Power-on Reset Characteristics
Test Conditions
Symbol
Parameter
VDD
Conditions
Min.
Typ.
Max.
Unit
VPOR
VDD Start Voltage to Ensure
Power-on Reset
¾
¾
¾
¾
100
mV
RRVDD
VDD raising rate to Ensure
Power-on Reset
¾
¾
0.035
¾
¾
V/ms
tPOR
Minimum Time for VDD Stays at
VPOR to Ensure Power-on Reset
¾
¾
1
¾
¾
ms
V
D D
tP
O R
R R
V D D
V
P O R
T im e
Rev. 1.10
13
June 9, 2009
HT46R064/065/066/0662/067
System Architecture
A key factor in the high-performance features of the
Holtek range of microcontrollers is attributed to the internal system architecture. The range of devices take advantage of the usual features found within RISC
microcontrollers providing increased speed of operation
and enhanced performance. The pipelining scheme is
implemented in such a way that instruction fetching and
instruction execution are overlapped, hence instructions
are effectively executed in one cycle, with the exception
of branch or call instructions. An 8-bit wide ALU is used
in practically all operations of the instruction set. It carries out arithmetic operations, logic operations, rotation,
increment, decrement, branch decisions, etc. The internal data path is simplified by moving data through the
Accumulator and the ALU. Certain internal registers are
implemented in the Data Memory and can be directly or
indirectly addressed. The simple addressing methods of
these registers along with additional architectural features ensure that a minimum of external components is
required to provide a functional I/O and A/D control system with maximum reliability and flexibility.
Program Counter is incremented at the beginning of the
T1 clock during which time a new instruction is fetched.
The remaining T2~T4 clocks carry out the decoding and
execution functions. In this way, one T1~T4 clock cycle
forms one instruction cycle. Although the fetching and
execution of instructions takes place in consecutive instruction cycles, the pipelining structure of the
microcontroller ensures that instructions are effectively
executed in one instruction cycle. The exception to this
are instructions where the contents of the Program
Counter are changed, such as subroutine calls or
jumps, in which case the instruction will take one more
instruction cycle to execute.
For instructions involving branches, such as jump or call
instructions, two instruction cycles are required to complete instruction execution. An extra cycle is required as
the program takes one cycle to first obtain the actual
jump or call address and then another cycle to actually
execute the branch. The requirement for this extra cycle
should be taken into account by programmers in timing
sensitive applications.
Clocking and Pipelining
The main system clock, derived from either a Crystal/Resonator or RC oscillator is subdivided into four internally generated non-overlapping clocks, T1~T4. The
O s c illa to r C lo c k
( S y s te m C lo c k )
P h a s e C lo c k T 1
P h a s e C lo c k T 2
P h a s e C lo c k T 3
P h a s e C lo c k T 4
P ro g ra m
C o u n te r
P ip e lin in g
P C
P C + 1
F e tc h In s t. (P C )
E x e c u te In s t. (P C -1 )
P C + 2
F e tc h In s t. (P C + 1 )
E x e c u te In s t. (P C )
F e tc h In s t. (P C + 2 )
E x e c u te In s t. (P C + 1 )
System Clocking and Pipelining
M O V A ,[1 2 H ]
2
C A L L D E L A Y
3
C P L [1 2 H ]
4
:
5
:
6
1
D E L A Y :
F e tc h In s t. 1
E x e c u te In s t. 1
F e tc h In s t. 2
E x e c u te In s t. 2
F e tc h In s t. 3
F lu s h P ip e lin e
F e tc h In s t. 6
E x e c u te In s t. 6
F e tc h In s t. 7
N O P
Instruction Fetching
Rev. 1.10
14
June 9, 2009
HT46R064/065/066/0662/067
Program Counter
terrupt acknowledge signal, the contents of the Program
Counter are pushed onto the stack. At the end of a subroutine or an interrupt routine, signaled by a return instruction, RET or RETI, the Program Counter is restored
to its previous value from the stack. After a device reset,
the Stack Pointer will point to the top of the stack.
During program execution, the Program Counter is used
to keep track of the address of the next instruction to be
executed. It is automatically incremented by one each
time an instruction is executed except for instructions,
such as ²JMP² or ²CALL² that demand a jump to a
non-consecutive Program Memory address. Note that
the Program Counter width varies with the Program
Memory capacity depending upon which device is selected. However, it must be noted that only the lower 8
bits, known as the Program Counter Low Register, are
directly addressable by user.
P ro g ra m
T o p o f S ta c k
B o tto m
HT46R064
PC9,PC8
HT46R065
PC10~PC8
HT46R066
HT46R0662
PC11~PC8
HT46R067
PC12~PC8
P ro g ra m
M e m o ry
S ta c k L e v e l 3
o f S ta c k
S ta c k L e v e l 8
Device
Program Counter
Program Counter
High Byte
S ta c k L e v e l 1
S ta c k L e v e l 2
S ta c k
P o in te r
When executing instructions requiring jumps to
non-consecutive addresses such as a jump instruction,
a subroutine call, interrupt or reset, etc., the
microcontroller manages program control by loading the
required address into the Program Counter. For conditional skip instructions, once the condition has been
met, the next instruction, which has already been
fetched during the present instruction execution, is discarded and a dummy cycle takes its place while the correct instruction is obtained.
Device
C o u n te r
Stack Levels
HT46R064
4
HT46R065
HT46R066
HT46R0662
6
HT46R067
8
If the stack is full and an enabled interrupt takes place,
the interrupt request flag will be recorded but the acknowledge signal will be inhibited. When the Stack
Pointer is decremented, by RET or RETI, the interrupt
will be serviced. This feature prevents stack overflow allowing the programmer to use the structure more easily.
However, when the stack is full, a CALL subroutine instruction can still be executed which will result in a stack
overflow. Precautions should be taken to avoid such
cases which might cause unpredictable program
branching.
PCL Register
PCL7~PCL0
The lower byte of the Program Counter, known as the
Program Counter Low register or PCL, is available for
program control and is a readable and writeable register. By transferring data directly into this register, a short
program jump can be executed directly, however, as
only this low byte is available for manipulation, the
jumps are limited to the present page of memory, that is
256 locations. When such program jumps are executed
it should also be noted that a dummy cycle will be inserted.
Arithmetic and Logic Unit - ALU
The arithmetic-logic unit or ALU is a critical area of the
microcontroller that carries out arithmetic and logic operations of the instruction set. Connected to the main
microcontroller data bus, the ALU receives related instruction codes and performs the required arithmetic or
logical operations after which the result will be placed in
the specified register. As these ALU calculation or operations may result in carry, borrow or other status
changes, the status register will be correspondingly updated to reflect these changes. The ALU supports the
following functions:
The lower byte of the Program Counter is fully accessible under program control. Manipulating the PCL might
cause program branching, so an extra cycle is needed
to pre-fetch. Further information on the PCL register can
be found in the Special Function Register section.
· Arithmetic operations: ADD, ADDM, ADC, ADCM,
Stack
SUB, SUBM, SBC, SBCM, DAA
· Logic operations: AND, OR, XOR, ANDM, ORM,
This is a special part of the memory which is used to
save the contents of the Program Counter only. The
stack is neither part of the Data or Program Memory
space, and is neither readable nor writeable. The activated level is indexed by the Stack Pointer, SP, and is
neither readable nor writeable. At a subroutine call or inRev. 1.10
XORM, CPL, CPLA
· Rotation RRA, RR, RRCA, RRC, RLA, RL, RLCA,
RLC
· Increment and Decrement INCA, INC, DECA, DEC
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HT46R064/065/066/0662/067
· Branch decision, JMP, SZ, SZA, SNZ, SIZ, SDZ,
Special Vectors
SIZA, SDZA, CALL, RET, RETI
Within the Program Memory, certain locations are reserved for special usage such as reset and interrupts.
Program Memory
· Reset Vector
The Program Memory is the location where the user
code or program is stored. The device is supplied with
One-Time Programmable, OTP, memory where users
can program their application code into the device. By
using the appropriate programming tools, OTP devices
offer users the flexibility to freely develop their applications which may be useful during debug or for products
requiring frequent upgrades or program changes.
This vector is reserved for use by the device reset for
program initialisation. After a device reset is initiated, the
program will jump to this location and begin execution.
· External interrupt vector
This vector is used by the external interrupt. If the external interrupt pin on the device receives an edge
transition, the program will jump to this location and
begin execution if the external interrupt is enabled and
the stack is not full. The external interrupt active edge
transition type, whether high to low, low to high or both
is specified in the CTRL1 register.
Structure
The Program Memory has a capacity of 1K´14 to
8K´16. The Program Memory is addressed by the Program Counter and also contains data, table information
and interrupt entries. Table data, which can be setup in
any location within the Program Memory, is addressed
by separate table pointer registers.
Device
· Timer/Event 0/1/2 counter interrupt vector
This internal vector is used by the Timer/Event Counters. If a Timer/Event Counter overflow occurs, the
program will jump to its respective location and begin
execution if the associated Timer/Event Counter interrupt is enabled and the stack is not full.
Capacity
HT46R064
1K´14
HT46R065
2K´15
HT46R066
HT46R0662
4K´15
HT46R067
8K´16
· Time base interrupt vector
This internal vector is used by the internal Time Base.
If a Time Base overflow occurs, the program will jump
to this location and begin execution if the Time Base
counter interrupt is enabled and the stack is not full.
H T 4 6 R 0 6 4
H T 4 6 R 0 6 5
H T 4 6 R 0 6 6
H T 4 6 R 0 6 6 2
H T 4 6 R 0 6 7
0 0 H
R e s e t
R e s e t
R e s e t
R e s e t
0 4 H
E x te rn a l
In te rru p t
E x te rn a l
In te rru p t
E x te rn a l
In te rru p t
E x te rn a l
In te rru p t
0 8 H
T im e r 0
In te rru p t
T im e r 0
In te rru p t
T im e r 0
In te rru p t
T im e r 0
In te rru p t
0 C H
A /D
In te rru p t
T im e r 1
In te rru p t
T im e r 1
In te rru p t
T im e r 1
In te rru p t
1 0 H
T im e B a s e
In te rru p t
A /D
In te rru p t
A /D
In te rru p t
T im e r 2
In te rru p t
T im e B a s e
In te rru p t
T im e B a s e
In te rru p t
A /D
In te rru p t
1 4 H
T im e B a s e
In te rru p t
1 8 H
3 F F H
1 4 b its
7 F F H
1 5 b its
F F F H
1 5 b its
1 F F F H
1 6 b its
Program Memory Structure
Rev. 1.10
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Look-up Table
Table Program Example
Any location within the Program Memory can be defined
as a look-up table where programmers can store fixed
data. To use the look-up table, the table pointer must
first be setup by placing the lower order address of the
look up data to be retrieved in the table pointer register,
TBLP. This register defines the lower 8-bit address of
the look-up table.
The accompanying example shows how the table
pointer and table data is defined and retrieved from the
device. This example uses raw table data located in the
last page which is stored there using the ORG statement. The value at this ORG statement is ²300H² which
refers to the start address of the last page within the 1K
Program Memory of the HT46R064 microcontrollers.
The table pointer is setup here to have an initial value of
²06H². This will ensure that the first data read from the
data table will be at the Program Memory address
²306H² or 6 locations after the start of the last page.
Note that the value for the table pointer is referenced to
the first address of the present page if the ²TABRDC
[m]² instruction is being used. The high byte of the table
data which in this case is equal to zero will be transferred to the TBLH register automatically when the
²TABRDL [m]² instruction is executed.
After setting up the table pointer, the table data can be
retrieved from the current Program Memory page or last
Program Memory page using the ²TABRDC[m]² or
²TABRDL [m]² instructions, respectively. When these instructions are executed, the lower order table byte from
the Program Memory will be transferred to the user defined Data Memory register [m] as specified in the instruction. The higher order table data byte from the
Program Memory will be transferred to the TBLH special
register. Any unused bits in this transferred higher order
byte will be read as ²0².
Because the TBLH register is a read-only register and
cannot be restored, care should be taken to ensure its
protection if both the main routine and Interrupt Service
Routine use the table read instructions. If using the table
read instructions, the Interrupt Service Routines may
change the value of TBLH and subsequently cause errors if used again by the main routine. As a rule it is recommended that simultaneous use of the table read
instructions should be avoided. However, in situations
where simultaneous use cannot be avoided, the interrupts should be disabled prior to the execution of any
main routine table-read instructions. Note that all table
related instructions require two instruction cycles to
complete their operation.
The following diagram illustrates the addressing/data
flow of the look-up table:
L a s t p a g e o r
p re s e n t p a g e
P C x ~ P C 8
P ro g ra m
H ig h B y te
A d d re s s
P C
T B L P R e g is te r
M e m o ry
D a ta
1 4 ~ 1 6 b its
U s e r S e le c te d
R e g is te r
R e g is te r T B L H
H ig h B y te
Instruction
TABRDC [m]
TABRDL [m]
L o w
B y te
Table Location Bits
b12
b11
b10
PC12 PC11 PC10
1
1
1
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
PC9
PC8
@7
@6
@5
@4
@3
@2
@1
@0
1
1
@7
@6
@5
@4
@3
@2
@1
@0
Table Location
Note:
PC12~PC8: Current Program Counter bits
@7~@0: Table Pointer TBLP bits
For the HT46R064, the Table address location is 10 bits, i.e. from b9~b0.
For the HT46R065, the Table address location is 11 bits, i.e. from b10~b0.
For the HT46R066/HT46R0662, the Table address location is 12 bits, i.e. from b11~b0
For the HT46R067, the Table address location is 13 bits, i.e. from b12~b0
Rev. 1.10
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Table Read Program Example:
tempreg1 db ?
; temporary register #1
tempreg2 db ?
; temporary register #2
:
:
mov a,06h
; initialise table pointer - note that this address
; is referenced
mov tblp,a
:
:
; to the last page or present page
tabrdl
;
;
;
;
tempreg1
dec tblp
tabrdl
transfers value in table referenced by table pointer
to tempregl
data at prog. memory address ²306H² transferred to
tempreg1 and TBLH
; reduce value of table pointer by one
tempreg2
;
;
;
;
;
;
;
;
transfers value in table referenced by table pointer
to tempreg2
data at prog.memory address ²305H² transferred to
tempreg2 and TBLH
in this example the data ²1AH² is transferred to
tempreg1 and data ²0FH² to register tempreg2
the value ²00H² will be transferred to the high byte
register TBLH
:
:
org 300h
dc
; sets initial address of last page
00Ah, 00Bh, 00Ch, 00Dh, 00Eh, 00Fh, 01Ah, 01Bh
:
:
Data Memory
The Data Memory is a volatile area of 8-bit wide RAM
internal memory and is the location where temporary information is stored.
The two sections of Data Memory, the Special Purpose
and General Purpose Data Memory are located at consecutive locations. All are implemented in RAM and are 8
bits wide but the length of each memory section is dictated by the type of microcontroller chosen. The start address of the Data Memory for all devices is the address
²00H².
Structure
Divided into two sections, the first of these is an area of
RAM where special function registers are located. These
registers have fixed locations and are necessary for correct operation of the device. Many of these registers can
be read from and written to directly under program control, however, some remain protected from user manipulation. The second area of Data Memory is reserved for
general purpose use. All locations within this area are
read and write accessible under program control.
Device
Capacity
Banks
HT46R064
64´8
¾
HT46R065
96´8
¾
HT46R066
128´8
¾
HT46R0662
224´8
0, 1
HT46R067
384´8
0, 1
Rev. 1.10
All microcontroller programs require an area of
read/write memory where temporary data can be stored
and retrieved for use later. It is this area of RAM memory
that is known as General Purpose Data Memory. This
area of Data Memory is fully accessible by the user program for both read and write operations. By using the
²SET [m].i² and ²CLR [m].i² instructions individual bits
can be set or reset under program control giving the
user a large range of flexibility for bit manipulation in the
Data Memory.
For some devices, the Data Memory is subdivided into
two banks, which are selected using a Bank Pointer.
Only data in Bank 0 can be directly addressed, data in
Bank 1 must be indirectly addressed.
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H T 4 6 R 0 6 4
H T 4 6 R 0 6 5
H T 4 6 R 0 6 6
0 0 H
IA R 0
IA R 0
IA R 0
0 1 H
M P 0
M P 0
M P 0
S p e c ia l
P u rp o s e
R e g is te r s
9 6 b y te s
1 2 8 b y te s
G e n e ra l
P u rp o s e
R e g is te r s
Special Function Registers
To ensure successful operation of the microcontroller,
certain internal registers are implemented in the Data
Memory area. These registers ensure correct operation
of internal functions such as timers, interrupts, etc., as
well as external functions such as I/O data control. The
location of these registers within the Data Memory begins at the address ²00H² and are mapped into both
Bank 0 and Bank 1. Any unused Data Memory locations
between these special function registers and the point
where the General Purpose Memory begins is reserved
and attempting to read data from these locations will return a value of ²00H².
3 F H
4 0 H
7 F H
6 4 b y te s
9 F H
B F H
H T 4 6 R 0 6 6 2
B a n k 0
B a n k 1
0 0 H
IA R 0
IA R 0
0 1 H
M P 0
M P 0
Indirect Addressing Registers - IAR0, IAR1
3 F H
4 0 H
T o ta l 2 2 4 b y te s
The Indirect Addressing Registers, IAR0 and IAR1, although having their locations in normal RAM register
space, do not actually physically exist as normal registers. The method of indirect addressing for RAM data
manipulation uses these Indirect Addressing Registers
and Memory Pointers, in contrast to direct memory addressing, where the actual memory address is specified. Actions on the IAR0 and IAR1 registers will result in
no actual read or write operation to these registers but
rather to the memory location specified by their corresponding Memory Pointer, MP0 or MP1. Acting as a
pair, IAR0 with MP0 and IAR1 with MP1 can together access data from the Data Memory. As the Indirect Addressing Registers are not physically implemented,
reading the Indirect Addressing Registers indirectly will
return a result of ²00H² and writing to the registers indirectly will result in no operation.
S p e c ia l
P u rp o s e
R e g is te r s
5 F H
G e n e ra l
P u rp o s e
R e g is te r s
F F H
H T 4 6 R 0 6 7
B a n k 0
B a n k 1
0 0 H
IA R 0
IA R 0
0 1 H
M P 0
M P 0
3 F H
4 0 H
T o ta l 3 8 4 b y te s
S p e c ia l
P u rp o s e
R e g is te r s
G e n e ra l
P u rp o s e
R e g is te r s
Memory Pointers - MP0, MP1
Two Memory Pointers, known as MP0 and MP1 are provided. These Memory Pointers are physically implemented in the Data Memory and can be manipulated in
the same way as normal registers providing a convenient way with which to indirectly address and track
data. MP0 can only be used to indirectly address data in
Bank 0 while MP1 can be used to address data in Bank
0 and Bank1. When any operation to the relevant Indirect Addressing Registers is carried out, the actual address that the microcontroller is directed to, is the
address specified by the related Memory Pointer. Note
that for the HT46R064 device, bit 7 of the Memory
Pointers is not required to address the full memory
space. When bit 7 of the Memory Pointers for these devices is read, a value of ²1² will be returned. Note that indirect addressing using MP1 and IAR1 must be used to
access any data in Bank 1. The following example shows
how to clear a section of four Data Memory locations already defined as locations adres1 to adres4.
F F H
Data Memory Structure
Note:
Most of the Data Memory bits can be directly
manipulated using the ²SET [m].i² and ²CLR
[m].i² with the exception of a few dedicated bits.
The Data Memory can also be accessed
through the memory pointer registers.
Special Purpose Data Memory
This area of Data Memory is where registers, necessary
for the correct operation of the microcontroller, are
stored. Most of the registers are both readable and
writeable but some are protected and are readable only,
the details of which are located under the relevant Special Function Register section. Note that for locations
that are unused, any read instruction to these addresses
will return the value ²00H².
Rev. 1.10
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HT46R064/065/066/0662/067
0 0 H
0 1 H
0 2 H
0 3 H
0 4 H
0 5 H
0 6 H
0 7 H
0 8 H
0 9 H
0 A H
0 B H
0 C H
0 D H
0 E H
0 F H
1 0 H
1 1 H
1 2 H
1 3 H
1 4 H
1 5 H
1 6 H
1 7 H
1 8 H
1 9 H
1 A H
1 B H
1 C H
1 D H
1 E H
1 F H
2 0 H
2 1 H
2 2 H
2 3 H
2 4 H
2 5 H
2 6 H
2 7 H
2 8 H
2 9 H
2 A H
2 B H
2 C H
2 D H
2 E H
2 F H
3 0 H
3 1 H
3 2 H
H T 4
IA
M
IA
M
6 R
R
P
R
P
0 6 4
0
0
1
1
A C C
P C L
T B L P
T B L H
W D T S
S T A T U S
IN T C 0
T M R 0
T M R 0 C
P
P
P
C
C
P
P A
P A
A P
A W
P B
P B
B P
P C
P C
C P
T R
T R
IN T
P W
A D
A D
A D
A C
C
U
C
K
C
U
U
L 0
L 1
C 1
M 0
R L
R H
C R
S R
H T 4
IA
M
IA
M
6 R
R
P
R
P
0 6 5
1
0
0
1
A C C
P C L
T B L P
T B L H
W D T S
S T A T U S
IN T C 0
T M R 0
T M R 0 C
T M R 1
T M R 1 C
P A
P A C
P A P U
P A W K
P B
P B C
P B P U
P C
P C C
P C P U
C T R L 0
C T R L 1
S C O M C
IN T
P W
A D
A D
A D
A C
C 1
M 0
R L
R H
C R
S R
H T 4
IA
M
IA
M
6 R
R
P
R
P
0 6 6
1
0
0
1
A C C
P C L
T B L P
T B L H
W D T S
S T A T U S
IN T C 0
T M R 0
T M R 0 C
T M R 1
T M R 1 C
P A
P A C
P A P U
P A W K
P B
P B C
P B P U
P C
P C C
P C P U
C T R L 0
C T R L 1
S C O M C
P W M 1
IN T C 1
P W M 0
A D R L
A D R H
A D C R
A C S R
P D
P D C
P D P U
H T 4 6
IA
M
IA
M
R 0 6 6 2
R 0
P 0
R 1
P 1
B P
A C C
P C L
T B L P
T B L H
W D T S
S T A T U S
IN T C 0
T M R 0
T M R 0 C
T M R 1
T M R 1 C
P A
P A C
P A P U
P A W K
P B
P B C
P B P U
P C
P C C
P C P U
C T R L 0
C T R L 1
S C O M C
P W M 1
IN T C 1
P W M 0
A D R L
A D R H
A D C R
A C S R
P D
P D C
P D P U
P E
P E C
P E P U
P F
P F C
P F P U
C T R L 2
H T 4
IA
M
IA
M
6 R 0 6 7
R 0
P 0
R 1
P 1
B P
A C C
P C L
T B L P
T B L H
W D T S
S T A T U S
IN T C 0
T M R 0
T M R 0 C
T M R 1
T M R 1 C
P A
P A C
P A P U
P A W K
P B
P B C
P B P U
P C
P C C
P C P U
C T R L 0
C T R L 1
S C O M C
P W M 1
IN T C 1
P W M 0
A D R L
A D R H
A D C R
A C S R
P D
P D C
P D P U
P E
P E C
P E P U
P F
P F C
P F P U
T M R 2
T M R 2 C
P W M 2
C T R L 2
3 F H
: U n u s e d , re a d a s "0 0 "
Special Purpose Data Memory
Rev. 1.10
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HT46R064/065/066/0662/067
· Indirect Addressing Program Example
data .section ¢data¢
adres1 db ?
adres2 db ?
adres3 db ?
adres4 db ?
block db ?
code .section at 0 code
org 00h
start:
mov
mov
mov
mov
a,04h
block,a
a,offset adres1
mp0,a
; setup size of block
loop:
clr
inc
sdz
jmp
IAR0
mp0
block
loop
; clear the data at address defined by MP0
; increment memory pointer
; check if last memory location has been cleared
; Accumulator loaded with first RAM address
; setup memory pointer with first RAM address
continue:
The important point to note here is that in the example shown above, no reference is made to specific Data Memory
addresses.
Accumulator - ACC
jumps within the current Program Memory page are permitted. When such operations are used, note that a
dummy cycle will be inserted.
The Accumulator is central to the operation of any
microcontroller and is closely related with operations
carried out by the ALU. The Accumulator is the place
where all intermediate results from the ALU are stored.
Without the Accumulator it would be necessary to write
the result of each calculation or logical operation such
as addition, subtraction, shift, etc., to the Data Memory
resulting in higher programming and timing overheads.
Data transfer operations usually involve the temporary
storage function of the Accumulator; for example, when
transferring data between one user defined register and
another, it is necessary to do this by passing the data
through the Accumulator as no direct transfer between
two registers is permitted.
Bank Pointer - BP
In the HT46R0662 and HT46R067 devices, the Data
Memory is divided into two Banks, known as Bank 0 and
Bank 1. A Bank Pointer, which is bit 0 of the Bank Pointer
register is used to select the required Data Memory
bank. Only data in Bank 0 can be directly addressed as
data in Bank 1 must be indirectly addressed using Memory Pointer MP1 and Indirect Addressing Register IAR1.
Using Memory Pointer MP0 and Indirect Addressing
Register IAR0 will always access data from Bank 0, irrespective of the value of the Bank Pointer. Memory
Pointer MP1 and Indirect Addressing Register IAR1 can
indirectly address data in either Bank 0 or Bank 1 depending upon the value of the Bank Pointer.
Program Counter Low Register - PCL
To provide additional program control functions, the low
byte of the Program Counter is made accessible to programmers by locating it within the Special Purpose area
of the Data Memory. By manipulating this register, direct
jumps to other program locations are easily implemented. Loading a value directly into this PCL register
will cause a jump to the specified Program Memory location, however, as the register is only 8-bit wide, only
The Data Memory is initialised to Bank 0 after a reset, except for the WDT time-out reset in the Idle/Sleep Mode, in
which case, the Data Memory bank remains unaffected.
It should be noted that Special Function Data Memory is
not affected by the bank selection, which means that the
Special Function Registers can be accessed from within
either Bank 0 or Bank 1. Directly addressing the Data
· BP Register
Bit
7
6
5
4
3
2
1
0
Name
¾
¾
¾
¾
¾
¾
¾
DMBP0
R/W
¾
¾
¾
¾
¾
¾
¾
R/W
POR
¾
¾
¾
¾
¾
¾
¾
0
Bit 7~1 :
unimplemented, read as ²0²
Bit 0
DMBP0: Data Memory bank point
0: Bank 0
1: Bank 1
Rev. 1.10
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HT46R064/065/066/0662/067
the status registers are important and if the interrupt routine can change the status register, precautions must be
taken to correctly save it. Note that bits 0~3 of the
STATUS register are both readable and writeable bits.
Memory will always result in Bank 0 being accessed irrespective of the value of the Bank Pointer.
Status Register - STATUS
This 8-bit register contains the zero flag (Z), carry flag
(C), auxiliary carry flag (AC), overflow flag (OV), power
down flag (PDF), and watchdog time-out flag (TO).
These arithmetic/logical operation and system management flags are used to record the status and operation of
the microcontroller.
Input/Output Ports and Control Registers
Within the area of Special Function Registers, the port
PA, PB, etc data I/O registers and their associated control register PAC, PBC, etc play a prominent role. These
registers are mapped to specific addresses within the
Data Memory as shown in the Data Memory table. The
data I/O registers, are used to transfer the appropriate
output or input data on the port. The control registers
specifies which pins of the port are set as inputs and
which are set as outputs. To setup a pin as an input, the
corresponding bit of the control register must be set
high, for an output it must be set low. During program initialisation, it is important to first setup the control registers to specify which pins are outputs and which are
inputs before reading data from or writing data to the I/O
ports. One flexible feature of these registers is the ability
to directly program single bits using the ²SET [m].i² and
²CLR [m].i² instructions. The ability to change I/O pins
from output to input and vice versa by manipulating specific bits of the I/O control registers during normal program operation is a useful feature of these devices.
With the exception of the TO and PDF flags, bits in the
status register can be altered by instructions like most
other registers. Any data written into the status register
will not change the TO or PDF flag. In addition, operations related to the status register may give different results due to the different instruction operations. The TO
flag can be affected only by a system power-up, a WDT
time-out or by executing the ²CLR WDT² or ²HALT² instruction. The PDF flag is affected only by executing the
²HALT² or ²CLR WDT² instruction or during a system
power-up.
The Z, OV, AC and C flags generally reflect the status of
the latest operations.
In addition, on entering an interrupt sequence or executing a subroutine call, the status register will not be
pushed onto the stack automatically. If the contents of
· STATUS Register
Bit
7
6
5
4
3
2
1
0
Name
¾
¾
TO
PDF
OV
Z
AC
C
R/W
¾
¾
R
R
R/W
R/W
R/W
R/W
POR
¾
¾
0
0
x
x
x
x
²x² unknown
Bit 7, 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Rev. 1.10
Unimplemented, read as ²0²
TO: Watchdog Time-Out flag
0: After power up or executing the ²CLR WDT² or ²HALT² instruction
1: A watchdog time-out occurred.
PDF: Power down flag
0: After power up or executing the ²CLR WDT² instruction
1: By executing the ²HALT² instruction
OV: Overflow flag
0: no overflow
1: an operation results in a carry into the highest-order bit but not a carry out of the
highest-order bit or vice versa.
Z: Zero flag
0: The result of an arithmetic or logical operation is not zero
1: The result of an arithmetic or logical operation is zero
AC: Auxiliary flag
0: no auxiliary carry
1: an operation results in a carry out of the low nibbles in addition, or no borrow from the
high nibble into the low nibble in subtraction
C: Carry flag
0: no carry-out
1: an operation results in a carry during an addition operation or if a borrow does not take place
during a subtraction operation
C is also affected by a rotate through carry instruction.
22
June 9, 2009
HT46R064/065/066/0662/067
System Control Registers - CTRL0, CTRL1, CTRL2
These registers are used to provide control over various internal functions. Some of these include the PFD control,
PWM control, certain system clock options, the LXT Oscillator low power control, external Interrupt edge trigger type,
Watchdog Timer enable function, Time Base function division ratio, and the LXT oscillator enable control.
· CTRL0 Register
¨
¨
¨
HT46R064
Bit
7
6
5
4
3
2
1
0
Name
¾
¾
PWMSEL
¾
PWMC0
PFDC
LXTLP
CLKMOD
R/W
¾
¾
R/W
¾
R/W
R/W
R/W
R/W
POR
¾
¾
0
¾
0
0
0
0
HT46R065
Bit
7
6
5
4
3
2
1
0
Name
¾
PFDCS
PWMSEL
¾
PWMC0
PFDC
LXTLP
CLKMOD
R/W
¾
R/W
R/W
¾
R/W
R/W
R/W
R/W
POR
¾
0
0
¾
0
0
0
0
HT46R066/HT46R0662/HT46R067
Bit
7
6
5
4
3
2
1
0
Name
PCFG
PFDCS
PWMSEL
PWMC1
PWMC0
PFDC
LXTLP
CLKMOD
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
0
0
0
0
0
0
0
Bit 7
PCFG: I/O configuration
0: INT/TC0/PFD pin-shared with PA3/PA2/PA1
1: INT/TC0/PFD pin-shared with PB5/PB4/PB3
Bit 6
PFDCS: PFD clock source
0: timer0
1: timer1
Bit 5
PWMSEL: PWM type selection
0: 6+2
1: 7+1
Bit 4
PWMC1: I/O or PWM1
0: I/O
1: PWM1
Bit 3
PWMC0: I/O or PWM0
0: I/O
1: PWM0
Bit 2
PFDC: I/O or PFD
0: I/O
1: PFD
Bit 1
LXTLP: LXT oscillator low power control function
0: LXT Oscillator quick start-up mode
1: LXT Oscillator Low Power Mode
Bit 0
CLKMOD: system clock mode selection.
0: High speed - HIRC used as system clock
1: Low speed - LXT used as system clock, HIRC oscillator stopped.
For HT46R064/065/066, these selections are only valid if the oscillator configuration options
have selected the HIRC+LXT.
Note:
If PWM0/1/2 output is selected by PWMC0/1/2 bit, fTP comes always from fSYS.
(fTP is the clock source for timer0/2 , time base and PWM)
Rev. 1.10
23
June 9, 2009
HT46R064/065/066/0662/067
· CTRL1 Register
Bit
7
6
5
4
3
2
1
0
Name
INTEG1
INTEG0
TBSEL1
TBSEL0
WDTEN3
WDTEN2
WDTEN1
WDTEN0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
1
0
0
0
1
0
1
0
Bit 7, 6
INTEG1, INTEG0: External interrupt edge type
00: disable
01: rising edge trigger
10: falling edge trigger
11: dual edge trigger
Bit 5, 4
TBSEL1, TBSEL0: Time base period selection
00: 210 ´ (1/fTP)
01: 211 ´ (1/fTP)
10: 212 ´ (1/fTP)
11: 213 ´ (1/fTP)
Bit 3~0
WDTEN3, WDTEN2, WDTEN1, WDTEN0: WDT function enable
1010: WDT disabled
Other values: WDT enabled - Recommended value is 0101
If the ²watchdog timer enable² is configuration option is selected, then the watchdog timer will
always be enabled and the WDTEN3~WDTEN0 control bits will have no effect.
Note:
The WDT is only disabled when both the WDT configuration option is disabled and when bits
WDTEN3~WDTEN0=1010.
The WDT is enabled when either the WDT configuration option is enabled or when bits
WDTEN3~WDTEN0¹1010.
· CTRL2 Register
¨
¨
HT46R0662
Bit
7
6
5
4
3
2
1
0
Name
¾
¾
¾
¾
¾
¾
¾
LXTEN
R/W
¾
¾
¾
¾
¾
¾
¾
R/W
POR
¾
¾
¾
¾
¾
¾
¾
1
7
6
5
4
3
2
1
0
HT46R067
Bit
Name
¾
¾
¾
PWMC2
¾
¾
¾
LXTEN
R/W
¾
¾
¾
R/W
¾
¾
¾
R/W
POR
¾
¾
¾
0
¾
¾
¾
1
Others
Unimplemented, read as ²0²
Bit 4
PWMC2: IO or PWM2 control
0: I/O
1: PWM2 output
Bit 0
LXTEN: LXT Oscillator on/off control after execution of HALT instruction
0: LXT off in Sleep Mode
1: LXT on in idle mode
Rev. 1.10
24
June 9, 2009
HT46R064/065/066/0662/067
Wake-up Function Register - PAWK
System Clock Configurations
When the microcontroller enters the Idle/Sleep Mode,
various methods exist to wake the device up and continue with normal operation. One method is to allow a
falling edge on the I/O pins to have a wake-up function.
This register is used to select which Port A I/O pins are
used to have this wake-up function.
There are five system oscillators. Three high speed oscillators and two low speed oscillators. The high speed
oscillators are the external crystal/ceramic oscillator HXT, the external - ERC, and the internal RC oscillator HIRC. The two low speed oscillator are the external
32768Hz oscillator - LXT and the internal 13kHz
(VDD=5V) oscillator - LIRC.
Pull-high Registers PAPU, PBPU, PCPU, PDPU, PEPU, PFPU
External Crystal/Resonator Oscillator - HXT
The I/O pins, if configured as inputs, can have internal
pull-high resistors connected, which eliminates the need
for external pull-high resistors. This register selects which
I/O pins are connected to internal pull-high resistors.
The simple connection of a crystal across OSC1 and
OSC2 will create the necessary phase shift and feedback for oscillation. However, for some crystals and
most resonator types, to ensure oscillation and accurate
frequency generation, it is necessary to add two small
value external capacitors, C1 and C2. The exact values
of C1 and C2 should be selected in consultation with the
crystal or resonator manufacturer¢s specification.
Software COM Register - SCOMC
The pins PB0~PB3 on Port B can be used as SCOM
lines to drive an external LCD panel. To implement this
function, the SCOMC register is used to setup the correct bias voltages on these pins.
C 1
O S C 1
R p
Oscillator
Various oscillator options offer the user a wide range of
functions according to their various application requirements. The flexible features of the oscillator functions
ensure that the best optimisation can be achieved in
terms of speed and power saving. Oscillator selections
and operation are selected through a combination of
configuration options and registers.
C 2
R f
In te r n a l
O s c illa to r
C ir c u it
T o in te r n a l
c ir c u its
O S C 2
N o te : 1 . R p is n o r m a lly n o t r e q u ir e d . C 1 a n d C 2 a r e r e q u ir e d .
2 . A lth o u g h n o t s h o w n O S C 1 /O S C 2 p in s h a v e a p a r a s itic
c a p a c ita n c e o f a r o u n d 7 p F .
Crystal/Resonator Oscillator - HXT
System Oscillator Overview
Crystal Oscillator C1 and C2 Values
In addition to being the source of the main system clock
the oscillators also provide clock sources for the Watchdog Timer and Time Base functions. External oscillators
requiring some external components as well as a two
fully integrated internal oscillators, requiring no external
components, are provided to form a wide range of both
fast and slow system oscillators.
Type
Name
Freq.
Pins
External Crystal
HXT
400kHz~
12MHz
OSC1/
OSC2
External RC
ERC
400kHz~
12MHz
OSC1
Internal High
Speed RC
HIRC
4, 8 or 12MHz
¾
Crystal Frequency
C1
C2
12MHz
8pF
10pF
8MHz
8pF
10pF
4MHz
8pF
10pF
1MHz
100pF
100pF
Note:
C1 and C2 values are for guidance only.
Crystal Recommended Capacitor Values
OSC1/
OSC2
External Low
Speed Crystal
LXT
Internal Low
Speed RC
LIRC
32768Hz
XT1/
XT2*
13kHz
¾
²*² For HT46R0662/HT46R067 only
Rev. 1.10
25
June 9, 2009
HT46R064/065/066/0662/067
External RC Oscillator - ERC
External 32768Hz Crystal Oscillator - LXT
Using the ERC oscillator only requires that a resistor,
with a value between 24kW and 1.5MW, is connected
between OSC1 and VDD, and a capacitor is connected
between OSC and ground, providing a low cost oscillator configuration. It is only the external resistor that determines the oscillation frequency; the external
capacitor has no influence over the frequency and is
connected for stability purposes only. Device trimming
during the manufacturing process and the inclusion of
internal frequency compensation circuits are used to ensure that the influence of the power supply voltage, temperature and process variations on the oscillation
frequency are minimised. As a resistance/frequency reference point, it can be noted that with an external 120K
resistor connected and with a 5V voltage power supply
and temperature of 25 degrees, the oscillator will have a
frequency of 4MHz within a tolerance of 2%. Here only
the OSC1 pin is used, which is shared with I/O pin PA6,
leaving pin PA5 free for use as a normal I/O pin.
When the microcontroller enters the Idle/Sleep Mode,
the system clock is switched off to stop microcontroller
activity and to conserve power. However, in many
microcontroller applications it may be necessary to keep
the internal timers operational even when the
microcontroller is in the Power-down Mode. To do this,
another clock, independent of the system clock, must be
provided. To do this a configuration option exists to allow
a high speed oscillator to be used in conjunction with a a
low speed oscillator, known as the LXT oscillator. The
LXT oscillator is implemented using a 32768Hz crystal
connected to pins OSC1/OSC2 for the HT46R064/
HT46R065/HT46R066 or connected to pins XT1/XT2
for the HT46R0662/HT46R067. However, for some
crystals, to ensure oscillation and accurate frequency
generation, it is necessary to add two small value external capacitors, C1 and C2. The exact values of C1 and
C2 should be selected in consultation with the crystal or
resonator manufacturer¢s specification. The external
parallel feedback resistor, Rp, is required. For the
HT46R064/HT46R065/HT46R066 devices the LXT oscillator must be used together with the HIRC oscillator.
For the HT46R0662/HT46R067 devices the LXT oscillator must be used together with either the HXT, ERC or
HIRC register.
V
R
D D
O S C
P A 6 /O S C 1
4 7 0 p F
In te r n a l
O s c illa to r
C ir c u it
C 1
P A 5 /O S C 2
External RC Oscillator - ERC
3 2 7 6 8 H z
R p
In te rn a l R C
O s c illa to r
Internal RC Oscillator - HIRC
The internal RC oscillator is a fully integrated system oscillator requiring no external components. The internal
RC oscillator has three fixed frequencies of either
4MHz, 8MHz or 12MHz. Device trimming during the
manufacturing process and the inclusion of internal frequency compensation circuits are used to ensure that
the influence of the power supply voltage, temperature
and process variations on the oscillation frequency are
minimised. As a result, at a power supply of either 3V or
5V and at a temperature of 25 degrees, the fixed oscillation frequency of 4MHz, 8MHz or 12MHz will have a tolerance within 2%. Note that if this internal system clock
option is selected, as it requires no external pins for its
operation, I/O pins PA5 and PA6 are free for use as normal I/O pins.
P A 5 /O S C 2
P A 6 /O S C 1
N o te : 1 . R p , C 1 a n d C 2 a r e r e q u ir e d .
2 . A lth o u g h n o t s h o w n p in s h a v e a
p a r a s itic c a p a c ita n c e o f a r o u n d 7 p F .
External LXT Oscillator - HXT
LXT Oscillator C1 and C2 Values
Crystal Frequency
C1
C2
32768Hz
8pF
10pF
Note:
1. C1 and C2 values are for guidance only.
2. RP=5M~10MW is recommended.
32768 Hz Crystal Recommended Capacitor Values
For the HT46R0662/HT46R067, a configuration option
determines if the XT1/XT2 pins are used for the LXT oscillator or as I/O pins.
In te rn a l R C
O s c illa to r
· If the I/O option is selected then the XT1/XT2 pins can
be used as normal I/O pins.
N o te : P A 5 /P A 6 u s e d a s n o rm a l I/O s
· If the ²LXT oscillator²is selected then the 32kHz crys-
Internal RC Oscillator - HIRC
Rev. 1.10
T o in te r n a l
c ir c u its
C 2
tal should be connected to the XT1/ XT2 pins.
26
June 9, 2009
HT46R064/065/066/0662/067
LXT Oscillator Low Power Function
Operating Modes
The LXT oscillator can function in one of two modes, the
Quick Start Mode and the Low Power Mode. The mode
selection is executed using the LXTLP bit in the CTRL0
register.
By using the LXT low frequency oscillator in combination with a high frequency oscillator, the system can be
selected to operate in a number of different modes.
These Modes are Normal, Slow, Idle and Sleep.
LXTLP Bit
LXT Mode
0
Quick Start
Mode Types and Selection
1
Low-power
The higher frequency oscillators provide higher performance but carry with it the disadvantage of higher
power requirements, while the opposite is of course true
for the lower frequency oscillators. With the capability of
dynamically switching between fast and slow oscillators,
the device has the flexibility to optimise the performance/power ratio, a feature especially important in
power sensitive portable applications.
After power on the LXTLP bit will be automatically
cleared to zero ensuring that the LXT oscillator is in the
Quick Start operating mode. In the Quick Start Mode the
LXT oscillator will power up and stabilise quickly. However, after the LXT oscillator has fully powered up it can
be placed into the Low-power mode by setting the
LXTLP bit high. The oscillator will continue to run but
with reduced current consumption, as the higher current
consumption is only required during the LXT oscillator
start-up. In power sensitive applications, such as battery
applications, where power consumption must be kept to
a minimum, it is therefore recommended that the application program sets the LXTLP bit high about 2 seconds
after power-on.
· HT46R064/HT46R065/HT46R066
For these devices, if the LXT oscillator is used then
the internal RC oscillator, HIRC, must be used as the
high frequency oscillator. If the HXT or the ERC oscillator is chosen as the high frequency system clock
then the LXT oscillator cannot be used for sharing the
same pins. The CLKMOD bit in the CTRL0 register
can be used to switch the system clock from the high
speed HIRC oscillator to the low speed LXT oscillator.
When the HALT instruction is executed and the device
enters the Idle/Sleep Mode the LXT oscillator will always continue to run. For these devices the LXT crystal is connected to the OSC1/OSC2 pins and LXT will
always run (the LXTEN bit is not used).
Note that CLKMOD is only valid in HIRC+LXT oscillator
configuration for HT46R064/HT46R065/HT46R066.
It should be noted that, no matter what condition the
LXTLP bit is set to, the LXT oscillator will always function normally, the only difference is that it will take more
time to start up if in the Low-power mode.
Internal Low Speed Oscillator - LIRC
The LIRC is a fully self-contained free running on-chip
RC oscillator with a typical frequency of 13kHz at 5V requiring no external components. When the device enters the Idle/Sleep Mode, the system clock will stop
running but the WDT oscillator continues to free-run and
to keep the watchdog active. However, to preserve
power in certain applications the LIRC can be disabled
via a configuration option.
f
H X T
· HT46R0662/HT46R067
For these devices the LXT oscillator can run together
with any of the high speed oscillators, namely the
HXT, ERC or the HIRC. The CLKMOD bit in the
CTRL0 register can be used to switch the system
clock from the selected high speed oscillator to the
low speed LXT oscillator. When the HALT instruction
is executed the LXT oscillator can be chosen to run or
not using the LXTEN bit in the CTRL2 register.
C L K M O D
( D e te r m in e N o r m a l/
S lo w M o d e )
H X T
C o n fig u r a tio n o p tio n
f
E R C
E R C
M U X
H IR C
f
( N o r m a l)
M U X
H IR C
(S L O W
f
f
S Y S
)
L X T
L X T
C o n fig u r a tio n o p tio n
L IR C
f
L IR C
f
M U X
S Y S
T o w a tc h d o g tim e r
/4
System Clock Configurations
Rev. 1.10
27
June 9, 2009
HT46R064/065/066/0662/067
For all devices, when the system enters the Sleep or Idle Mode, the high frequency system clock will always stop running. The accompanying tables shows the relationship between the CLKMOD bit, the HALT instruction and the
high/low frequency oscillators. The CLMOD bit can change normal or Slow Mode.
· Operating Mode Control
¨
HT46R064/HT46R065/HT46R066
OSC1/OSC2 Configuration
Operating
Mode
HIRC + LXT
HXT
ERC
HIRC
HIRC
Normal
LXT
Run
Run
Run
Run
Run
Slow
¾
¾
¾
Stop
Run
Sleep
Stop
Stop
Stop
Stop
Run
²¾² unimplemented
¨
HT46R0662/HT46R067
XT1/XT2
Configuration
OSC1/OSC2 Configuration
Operating
Mode
LXT
HXT
ERC
HIRC
LXTEN=0
LXTEN=1
Normal
Run
Run
Run
Run
Run
Slow
Stop
Stop
Stop
Run
Run
Idle
Stop
Stop
Stop
Stop
Run
Sleep
Stop
Stop
Stop
Stop
Stop
Rev. 1.10
28
June 9, 2009
HT46R064/065/066/0662/067
Mode Switching
the Watchdog Timer. The LXT, if configured for use, will
also consume a limited amount of power, as it continues
to run when the device enters the Idle/Sleep Mode. To
keep the LXT power consumption to a minimum level
the LXTLP bit in the CTRL0 register, which controls the
low power function, should be set high.
The devices are switched between one mode and another using a combination of the CLKMOD bit in the
CTRL0 register and the HALT instruction. The CLKMOD
bit chooses whether the system runs in either the Normal or Slow Mode by selecting the system clock to be
sourced from either a high or low frequency oscillator.
The HALT instruction forces the system into either the
Idle or Sleep Mode, depending upon whether the LXT
oscillator is running or not. The HALT instruction operates independently of the CLKMOD bit condition.
Wake-up
After the system enters the Idle/Sleep Mode, it can be
woken up from one of various sources listed as follows:
· An external reset
· An external falling edge on PA0 to PA7
When a HALT instruction is executed and the LXT oscillator is not running, the system enters the Sleep mode
the following conditions exist:
· A system interrupt
· A WDT overflow
· The system oscillator will stop running and the appli-
If the system is woken up by an external reset, the device will experience a full system reset, however, if the
device is woken up by a WDT overflow, a Watchdog
Timer reset will be initiated. Although both of these
wake-up methods will initiate a reset operation, the actual source of the wake-up can be determined by examining the TO and PDF flags. The PDF flag is cleared by a
system power-up or executing the clear Watchdog
Timer instructions and is set when executing the ²HALT²
instruction. The TO flag is set if a WDT time-out occurs,
and causes a wake-up that only resets the Program
Counter and Stack Pointer, the other flags remain in
their original status.
cation program will stop at the ²HALT² instruction.
· The Data Memory contents and registers will maintain
their present condition.
· The WDT will be cleared and resume counting if the
WDT clock source is selected to come from the WDT
or LXT oscillator. The WDT will stop if its clock source
originates from the system clock.
· The I/O ports will maintain their present condition.
· In the status register, the Power Down flag, PDF, will
be set and the Watchdog time-out flag, TO, will be
cleared.
Standby Current Considerations
Pins PA0 to PA7 can be setup via the PAWUK register to
permit a negative transition on the pin to wake-up the
system. When a PA0 to PA7 pin wake-up occurs, the program will resume execution at the instruction following
the ²HALT² instruction.
As the main reason for entering the Idle/Sleep Mode is
to keep the current consumption of the MCU to as low a
value as possible, perhaps only in the order of several
micro-amps, there are other considerations which must
also be taken into account by the circuit designer if the
power consumption is to be minimised.
If the system is woken up by an interrupt, then two possible situations may occur. The first is where the related
interrupt is disabled or the interrupt is enabled but the
stack is full, in which case the program will resume execution at the instruction following the ²HALT² instruction.
In this situation, the interrupt which woke-up the device
will not be immediately serviced, but will rather be serviced later when the related interrupt is finally enabled or
when a stack level becomes free. The other situation is
where the related interrupt is enabled and the stack is
not full, in which case the regular interrupt response
takes place. If an interrupt request flag is set to ²1² before entering the Idle/Sleep Mode, then any future interrupt requests will not generate a wake-up function of the
related interrupt will be ignored.
Special attention must be made to the I/O pins on the
device. All high-impedance input pins must be connected to either a fixed high or low level as any floating
input pins could create internal oscillations and result in
increased current consumption. Care must also be
taken with the loads, which are connected to I/O pins,
which are setup as outputs. These should be placed in a
condition in which minimum current is drawn or connected only to external circuits that do not draw current,
such as other CMOS inputs.
If the configuration options have enabled the Watchdog
Timer internal oscillator LIRC then this will continue to
run when in the Idle/Sleep Mode and will thus consume
some power. For power sensitive applications it may be
therefore preferable to use the system clock source for
Rev. 1.10
29
June 9, 2009
HT46R064/065/066/0662/067
The Watchdog Timer clock can emanate from three different sources, selected by configuration option. These
are LXT, fSYS/4, or LIRC. It is important to note that when
the system enters the Idle/Sleep Mode the instruction
clock is stopped, therefore if the configuration options
have selected fSYS/4 as the Watchdog Timer clock
source, the Watchdog Timer will cease to function. For
systems that operate in noisy environments, using the
LIRC or the LXT as the clock source is therefore the recommended choice. The division ratio of the prescaler is
determined by bits 0, 1 and 2 of the WDTS register,
known as WS0, WS1 and WS2. If the Watchdog Timer internal clock source is selected and with the WS0, WS1
and WS2 bits of the WDTS register all set high, the
prescaler division ratio will be 1:128, which will give a
maximum time-out period.
No matter what the source of the wake-up event is, once
a wake-up event occurs, there will be a time delay before normal program execution resumes. Consult the table for the related time.
Oscillator Type
Wake-up
Source
External RES
ERC, IRC
Crystal
tRSDT + tSST1
tRSDT + tSST2
tSST1
tSST2
PA Port
Interrupt
WDT Overflow
Note:
1. tRSTD (reset delay time), tSYS (system clock)
2. tRSTD is power-on delay, typical time=100ms
3. tSST1= 2 or 1024 tSYS
4. tSST2= 1024 tSYS
Under normal program operation, a Watchdog Timer
time-out will initialise a device reset and set the status bit
TO. However, if the system is in the Idle/Sleep Mode,
when a Watchdog Timer time-out occurs, the device will
be woken up, the TO bit in the status register will be set
and only the Program Counter and Stack Pointer will be
reset. Three methods can be adopted to clear the contents of the Watchdog Timer. The first is an external
hardware reset, which means a low level on the external
reset pin, the second is using the Clear Watchdog Timer
software instructions and the third is when a HALT instruction is executed. There are two methods of using
software instructions to clear the Watchdog Timer, one
of which must be chosen by configuration option. The
first option is to use the single ²CLR WDT² instruction
while the second is to use the two commands ²CLR
WDT1² and ²CLR WDT2². For the first option, a simple
execution of ²CLR WDT² will clear the Watchdog Timer
while for the second option, both ²CLR WDT1² and
²CLR WDT2² must both be executed to successfully
clear the Watchdog Timer. Note that for this second option, if ²CLR WDT1² is used to clear the Watchdog
Timer, successive executions of this instruction will have
no effect, only the execution of a ²CLR WDT2² instruction will clear the Watchdog Timer. Similarly after the
²CLR WDT2² instruction has been executed, only a successive ²CLR WDT1² instruction can clear the Watchdog Timer.
Wake-up Delay Time
Watchdog Timer
The Watchdog Timer, also known as the WDT, is provided to inhibit program malfunctions caused by the program jumping to unknown locations due to certain
uncontrollable external events such as electrical noise.
Watchdog Timer Operation
It operates by providing a device reset when the Watchdog Timer counter overflows. Note that if the Watchdog
Timer function is not enabled, then any instructions related to the Watchdog Timer will result in no operation.
Setting up the various Watchdog Timer options are controlled via the configuration options and two internal registers WDTS and CTRL1. Enabling the Watchdog Timer
can be controlled by both a configuration option and the
WDTEN bits in the CTRL1 internal register in the Data
Memory.
Configuration
Option
CTRL1
Register
WDT
Function
Disable
Disable
OFF
Disable
Enable
ON
Enable
x
ON
Watchdog Timer On/Off Control
The Watchdog Timer will be disabled if bits
WDTEN3~WDTEN0 in the CTRL1 register are written
with the binary value 1010B and WDT configuration option is disable. This will be the condition when the device
is powered up. Although any other data written to
WDTEN3~WDTEN0 will ensure that the Watchdog
Timer is enabled, for maximum protection it is recommended that the value 0101B is written to these bits.
Rev. 1.10
30
June 9, 2009
HT46R064/065/066/0662/067
C L R
W D T 1 F la g
C L R
W D T 2 F la g
C le a r W D T T y p e
C o n fig u r a tio n O p tio n
1 o r 2 In s tr u c tio n s
fS
C L R
/4
L X T
L IR C
C o n fig .
O p tio n
S e le c t
Y S
fW
D T C K
1 5 s ta g e c o u n te r
W D T C lo c k S o u r c e S e le c tio n
W D T T im e - o u t
W S 2 ~ W S 0
Watchdog Timer
· WDTS Register
Bit
7
6
5
4
3
2
1
0
Name
¾
¾
¾
¾
¾
WS2
WS1
WS0
R/W
¾
¾
¾
¾
¾
R/W
R/W
R/W
POR
¾
¾
¾
¾
¾
1
1
1
Bit 7~3 :
unimplemented, read as ²0²
Bit 2~0
WS2, WS1, WS0: WDT time-out period selection
000: 28 tWDTCK
001: 29 tWDTCK
010: 210 tWDTCK
011: 211 tWDTCK
100: 212 tWDTCK
101: 213 tWDTCK
110: 214 tWDTCK
111: 215 tWDTCK
Rev. 1.10
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HT46R064/065/066/0662/067
Reset and Initialisation
A reset function is a fundamental part of any
microcontroller ensuring that the device can be set to
some predetermined condition irrespective of outside
parameters. The most important reset condition is after
power is first applied to the microcontroller. In this case,
internal circuitry will ensure that the microcontroller, after a short delay, will be in a well defined state and ready
to execute the first program instruction. After this
power-on reset, certain important internal registers will
be set to defined states before the program commences. One of these registers is the Program Counter,
which will be reset to zero forcing the microcontroller to
begin program execution from the lowest Program
Memory address.
proper reset operation. For this reason it is recommended that an external RC network is connected to
the RES pin, whose additional time delay will ensure
that the RES pin remains low for an extended period
to allow the power supply to stabilise. During this time
delay, normal operation of the microcontroller will be
inhibited. After the RES line reaches a certain voltage
value, the reset delay time tRSTD is invoked to provide
an extra delay time after which the microcontroller will
begin normal operation. The abbreviation SST in the
figures stands for System Start-up Timer.
In addition to the power-on reset, situations may arise
where it is necessary to forcefully apply a reset condition
when the microcontroller is running. One example of this
is where after power has been applied and the
microcontroller is already running, the RES line is forcefully pulled low. In such a case, known as a normal operation reset, some of the microcontroller registers remain
unchanged allowing the microcontroller to proceed with
normal operation after the reset line is allowed to return
high. Another type of reset is when the Watchdog Timer
overflows and resets the microcontroller. All types of reset operations result in different register conditions being setup.
In te rn a l R e s e t
V D D
0 .9 V
R E S
t RR
SS TT DD ++
t SS
SS TT
Note: tRSTD is power-on delay, typical time=100ms
Power-On Reset Timing Chart
For most applications a resistor connected between
VDD and the RES pin and a capacitor connected between VSS and the RES pin will provide a suitable external reset circuit. Any wiring connected to the RES
pin should be kept as short as possible to minimise
any stray noise interference.
For applications that operate within an environment
where more noise is present the Enhanced Reset Circuit shown is recommended.
V
Another reset exists in the form of a Low Voltage Reset,
LVR, where a full reset, similar to the RES reset is implemented in situations where the power supply voltage
falls below a certain threshold.
D D
0 .0 1 m F * *
1 N 4 1 4 8 *
There are five ways in which a microcontroller reset can
occur, through events occurring both internally and externally:
V D D
1 0 k W ~
1 0 0 k W
Reset Functions
3 0 0 W *
R E S /P A 7
0 .1 ~ 1 m F
V S S
· Power-on Reset
The most fundamental and unavoidable reset is the
one that occurs after power is first applied to the
microcontroller. As well as ensuring that the Program
Memory begins execution from the first memory address, a power-on reset also ensures that certain
other registers are preset to known conditions. All the
I/O port and port control registers will power up in a
high condition ensuring that all pins will be first set to
inputs.
Although the microcontroller has an internal RC reset
function, if the VDD power supply rise time is not fast
enough or does not stabilise quickly at power-on, the
internal reset function may be incapable of providing
Rev. 1.10
D D
Note:
²*² It is recommended that this component is
added for added ESD protection
²**² It is recommended that this component is
added in environments where power line noise
is significant
External RES Circuit
More information regarding external reset circuits is
located in Application Note HA0075E on the Holtek
website.
32
June 9, 2009
HT46R064/065/066/0662/067
· RES Pin Reset
W D T T im e - o u t
This type of reset occurs when the microcontroller is
already running and the RES pin is forcefully pulled
low by external hardware such as an external switch.
In this case as in the case of other reset, the Program
Counter will reset to zero and program execution initiated from this point.
R E S
0 .4 V
0 .9 V
tS
In te rn a l R e s e t
WDT Time-out Reset during Idle/Sleep
Timing Chart
Note:
D D
D D
tR
S T D
+
tS
S T
In te rn a l R e s e t
RES Reset Timing Chart
The different types of reset described affect the reset
flags in different ways. These flags, known as PDF and
TO are located in the status register and are controlled
by various microcontroller operations, such as the
Idle/Sleep function or Watchdog Timer. The reset flags
are shown in the table:
· Low Voltage Reset - LVR
The microcontroller contains a low voltage reset circuit in order to monitor the supply voltage of the device. The LVR function is selected via a configuration
option. If the supply voltage of the device drops to
within a range of 0.9V~VLVR such as might occur when
changing the battery, the LVR will automatically reset
the device internally. For a valid LVR signal, a low supply voltage, i.e., a voltage in the range between
0.9V~VLVR must exist for a time greater than that specified by tLVR in the A.C. characteristics. If the low supply voltage state does not exceed this value, the LVR
will ignore the low supply voltage and will not perform
a reset function. The actual VLVR value can be selected via configuration options.
TO PDF
L V R
S T D
+
tS
Low Voltage Reset Timing Chart
The Watchdog time-out Reset during normal operation is the same as a hardware RES pin reset except
that the Watchdog time-out flag TO will be set to ²1².
W D T T im e - o u t
tS
0
Power-on reset
u
u
RES or LVR reset during Normal or Slow
Mode operation
1
u
WDT time-out reset during Normal or Slow
Mode operation
1
1
WDT time-out reset during Idle or Sleep
Mode operation
Item
· Watchdog Time-out Reset during Normal Operation
+
0
The following table indicates the way in which the various components of the microcontroller are affected after
a power-on reset occurs.
Note: tRSTD is power-on delay, typical time=100ms
S T D
RESET Conditions
Note: ²u² stands for unchanged
S T
In te rn a l R e s e t
tR
The tSST can be chosen to be either 1024 or 2
clock cycles via configuration option if the system clock source is provided by ERC or HIRC.
The SST is 1024 for HXT or LXT.
Reset Initial Conditions
Note: tRSTD is power-on delay, typical time=100ms
tR
S T
S T
In te rn a l R e s e t
Note: tRSTD is power-on delay, typical time=100ms
WDT Time-out Reset during Normal Operation
Timing Chart
Condition After RESET
Program Counter
Reset to zero
Interrupts
All interrupts will be disabled
WDT
Clear after reset, WDT begins
counting
Timer/Event
Counter
Timer Counter will be turned off
Prescaler
The Timer Counter Prescaler will
be cleared
Input/Output Ports I/O ports will be setup as inputs
Stack Pointer
· Watchdog Time-out Reset during Idle/Sleep mode
Stack Pointer will point to the top
of the stack
The Watchdog time-out Reset during Idle/Sleep mode
is a little different from other kinds of reset. Most of the
conditions remain unchanged except that the Program Counter and the Stack Pointer will be cleared to
²0² and the TO flag will be set to ²1². Refer to the A.C.
Characteristics for tSST details.
Rev. 1.10
33
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HT46R064/065/066/0662/067
The different kinds of resets all affect the internal registers of the microcontroller in different ways. To ensure reliable
continuation of normal program execution after a reset occurs, it is important to know what condition the microcontroller
is in after a particular reset occurs. The following table describes how each type of reset affects each of the
microcontroller internal registers.
HT46R064
HT46R065
HT46R066
HT46R0662
HT46R067
Register
·
·
·
·
·
Power-on
Reset
RES or LVR
Reset
WDT Time-out
(Normal Operation)
WDT Time-out
(Idle/Sleep)
0000 0000
0000 0000
0000 0000
0000 0000
PCL
MP0
·
1xxx xxxx
1uuu uuuu
1uuu uuuu
1uuu uuuu
MP1
·
1xxx xxxx
1uuu uuuu
1uuu uuuu
1uuu uuuu
MP0
·
·
·
·
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
MP1
·
·
·
·
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
·
·
---- ---0
---- ---0
---- ---0
---- ---u
BP
ACC
·
·
·
·
·
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
TBLP
·
·
·
·
·
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
--xx xxxx
--uu uuuu
--uu uuuu
--uu uuuu
-xxx xxxx
-uuu uuuu
-uuu uuuu
-uuu uuuu
·
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
·
·
TBLH
·
·
WDTS
·
·
·
·
·
---- -111
---- -111
---- -111
---- -uuu
STATUS
·
·
·
·
·
--00 xxxx
--uu uuuu
--1u uuuu
--11 uuuu
INTC0
·
·
·
·
·
-000 0000
-000 0000
-000 0000
-uuu uuuu
---0 ---0
---0 ---0
---0 ---0
---u ---u
--00 --00
--00 --00
--00 --00
--uu --uu
·
-000 -000
-000 -000
-000 -000
-uuu -uuu
·
·
INTC1
·
·
TMR0
·
·
·
·
·
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
TMR0C
·
·
·
·
·
0000 1000
0000 1000
0000 1000
uuuu uuuu
TMR1
·
·
·
·
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
TMR1C
·
·
·
·
0000 1---
0000 1---
0000 1---
uuuu u---
TMR2
·
xxxx xxxx
xxxx xxxx
xxxx xxxx
uu-u uuuu
TMR2C
·
00-0 1000
00-0 1000
00-0 1000
uuuu uuuu
PA
·
·
·
·
·
1111 1111
1111 1111
1111 1111
uuuu uuuu
PAC
·
·
·
·
·
1111 1111
1111 1111
1111 1111
uuuu uuuu
PAWK
·
·
·
·
·
0000 0000
0000 0000
0000 0000
uuuu uuuu
PAPU
·
·
·
·
·
-000 0000
-000 0000
-000 0000
-uuu uuuu
PB
·
·
·
--11 1111
--11 1111
--11 1111
--uu uuuu
PBC
·
·
·
--11 1111
--11 1111
--11 1111
--uu uuuu
PBPU
·
·
·
--00 0000
-000 0000
-000 0000
--uu uuuu
·
1111 1111
1111 1111
1111 1111
uuuu uuuu
·
·
1111 1111
1111 1111
1111 1111
uuuu uuuu
·
·
0000 0000
0000 0000
0000 0000
uuuu uuuu
PB
·
PBC
PBPU
Rev. 1.10
34
June 9, 2009
HT46R064/065/066/0662/067
HT46R067
HT46R0662
HT46R066
HT46R065
HT46R064
Register
Power-on
Reset
RES or LVR
Reset
WDT Time-out
(Normal Operation)
WDT Time-out
(Idle/Sleep)
PC
·
---- 1111
---- 1111
---- 1111
---- uuuu
PCC
·
---- 1111
---- 1111
---- 1111
---- uuuu
PCPU
·
---- 0000
---- 0000
---- 0000
---- uuuu
PC
·
·
·
·
1111 1111
1111 1111
1111 1111
uuuu uuuu
PCC
·
·
·
·
1111 1111
1111 1111
1111 1111
uuuu uuuu
PCPU
·
·
·
·
0000 0000
0000 0000
0000 0000
uuuu uuuu
PD
·
---- 1111
---- 1111
---- 1111
---- uuuu
PDC
·
---- 1111
---- 1111
---- 1111
---- uuuu
PDPU
·
---- 0000
---- 0000
---- 0000
---- uuuu
PD
·
·
1111 1111
1111 1111
1111 1111
uuuu uuuu
PDC
·
·
1111 1111
1111 1111
1111 1111
uuuu uuuu
PDPU
·
·
0000 0000
0000 0000
0000 0000
uuuu uuuu
PE
·
·
1111 1111
1111 1111
1111 1111
uuuu uuuu
PEC
·
·
1111 1111
1111 1111
1111 1111
uuuu uuuu
PEPU
·
·
0000 0000
0000 0000
0000 0000
uuuu uuuu
PF
·
·
---- --11
---- --11
---- --11
---- --uu
PFC
·
·
---- --11
---- --11
---- --11
---- --uu
PFPU
·
·
---- --00
---- --00
---- --00
---- --uu
--0- 0000
--0- 0000
--0- 0000
--u- uuuu
-00- 0000
-00- 0000
-00- 0000
-uu- uuuu
·
·
CTRL0
CTRL1
·
·
·
·
·
0000 0000
0000 0000
0000 0000
uuuu uuuu
·
·
·
1000 1010
1000 1010
1000 1010
uuuu uuuu
---- ---1
---- ---1
---- ---1
---- ---u
·
---0 ---1
---0 ---1
---0 ---1
---u ---u
·
CTRL2
SCOMC
·
PWM0
·
·
·
·
0000 0000
0000 0000
0000 0000
uuuu uuuu
·
·
·
·
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
·
·
·
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
·
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
PWM1
PWM2
ADRL
·
·
·
·
·
xxxx ----
xxxx ----
xxxx ----
uuuu ----
ADRH
·
·
·
·
·
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
ADCR
·
·
·
·
·
0100 0000
0100 0000
0100 0000
uuuu uuuu
ACSR
·
·
·
·
·
10-- -000
10-- -000
10-- -000
uu-- -uuu
Note:
²-² not implemented
²u² means ²unchanged²
²x² means ²unknown²
Rev. 1.10
35
June 9, 2009
HT46R064/065/066/0662/067
Port A Wake-up
Input/Output Ports
If the HALT instruction is executed, the device will enter
the Idle/Sleep Mode, where the system clock will stop
resulting in power being conserved, a feature that is important for battery and other low-power applications.
Various methods exist to wake-up the microcontroller,
one of which is to change the logic condition on one of
the PA0~PA7 pins from high to low. After a HALT instruction forces the microcontroller into entering the
Idle/Sleep Mode, the processor will remain idle or in a
low-power state until the logic condition of the selected
wake-up pin on Port A changes from high to low. This
function is especially suitable for applications that can
be woken up via external switches. Note that pins PA0 to
PA7 can be selected individually to have this wake-up
feature using an internal register known as PAWK, located in the Data Memory.
Holtek microcontrollers offer considerable flexibility on
their I/O ports. Most pins can have either an input or output designation under user program control. Additionally, as there are pull-high resistors and wake-up
software configurations, the user is provided with an I/O
structure to meet the needs of a wide range of application possibilities.
For input operation, these ports are non-latching, which
means the inputs must be ready at the T2 rising edge of
instruction ²MOV A,[m]², where m denotes the port address. For output operation, all the data is latched and
remains unchanged until the output latch is rewritten.
Pull-high Resistors
Many product applications require pull-high resistors for
their switch inputs usually requiring the use of an external
resistor. To eliminate the need for these external resistors, when configured as an input have the capability of
being connected to an internal pull-high resistor. These
pull-high resistors are selectable via a register known as
PAPU, PBPU, PCPU, PDPU, PEPU and PFPU located in
the Data Memory. The pull-high resistors are implemented using weak PMOS transistors. Note that pin PA7
does not have a pull-high resistor selection.
· PAWK, PAC, PAPU, PBC, PBPU, PCC, PCPU, PDC, PDPU, PEC, PEPU, PFC, PFPU Register
¨
HT46R064
Register
Name
POR
PAWK
Bit
7
6
5
4
3
2
1
0
00H
PAWK7
PAWK6
PAWK5
PAWK4
PAWK3
PAWK2
PAWK1
PAWK0
PAC
FFH
PAC7
PAC6
PAC5
PAC4
PAC3
PAC2
PAC1
PAC0
PAPU
00H
¾
PAPU6
PAPU5
PAPU4
PAPU3
PAPU2
PAPU1
PAPU0
PBC
3FH
¾
¾
PBC5
PBC4
PBC3
PBC2
PBC1
PBC0
PBPU
00H
¾
¾
PBPU5
PBPU4
PBPU3
PBPU2
PBPU1
PBPU0
PCC
FFH
¾
¾
¾
¾
PCC3
PCC2
PCC1
PCC0
PCPU
00H
¾
¾
¾
¾
PCPU3
PCPU2
PCPU1
PCPU0
²¾² Unimplemented, read as ²0²
PAWKn: PA wake-up function enable
0: disable
1: enable
PACn/PBCn/PCCn: I/O type selection
0: output
1: input
PAPUn/PBPUn/PCPUn: Pull-high function enable
0: disable
1: enable
Rev. 1.10
36
June 9, 2009
HT46R064/065/066/0662/067
¨
HT46R065
Bit
Register
Name
POR
7
6
5
4
3
2
1
0
PAWK
00H
PAWK7
PAWK6
PAWK5
PAWK4
PAWK3
PAWK2
PAWK1
PAWK0
PAC
FFH
PAC7
PAC6
PAC5
PAC4
PAC3
PAC2
PAC1
PAC0
PAPU
00H
¾
PAPU6
PAPU5
PAPU4
PAPU3
PAPU2
PAPU1
PAPU0
PBC
3FH
¾
¾
PBC5
PBC4
PBC3
PBC2
PBC1
PBC0
PBPU0
PBPU
00H
¾
¾
PBPU5
PBPU4
PBPU3
PBPU2
PBPU1
PCC
FFH
PCC7
PCC6
PCC5
PCC4
PCC3
PCC2
PCC1
PCC0
PCPU
00H
PCPU7
PCPU6
PCPU5
PCPU4
PCPU3
PCPU2
PCPU1
PCPU0
²¾² Unimplemented, read as ²0²
PAWKn: PA wake-up function enable
0: disable
1: enable
PACn/PBCn/PCCn: I/O type selection
0: output
1: input
PAPUn/PBPUn/PCPUn: Pull-high function enable
0: disable
1: enable
¨
HT46R066
Register
Name
POR
PAWK
Bit
7
6
5
4
3
2
1
0
00H
PAWK7
PAWK6
PAWK5
PAWK4
PAWK3
PAWK2
PAWK1
PAWK0
PAC
FFH
PAC7
PAC6
PAC5
PAC4
PAC3
PAC2
PAC1
PAC0
PAPU
00H
¾
PAPU6
PAPU5
PAPU4
PAPU3
PAPU2
PAPU1
PAPU0
PBC
3FH
¾
¾
PBC5
PBC4
PBC3
PBC2
PBC1
PBC0
PBPU
00H
¾
¾
PBPU5
PBPU4
PBPU3
PBPU2
PBPU1
PBPU0
PCC
FFH
PCC7
PCC6
PCC5
PCC4
PCC3
PCC2
PCC1
PCC0
PCPU
00H
PCPU7
PCPU6
PCPU5
PCPU4
PCPU3
PCPU2
PCPU1
PCPU0
PDC
0FH
¾
¾
¾
¾
PDC3
PDC2
PDC1
PDC0
PDPU
00H
¾
¾
¾
¾
PDPU3
PDPU2
PDPU1
PDPU0
²¾² Unimplemented, read as ²0²
PAWKn: PA wake-up function enable
0: disable
1: enable
PACn/PBCn/PCCn/PDCn: I/O type selection
0: output
1: input
PAPUn/PBPUn/PCPUn/PDPUn: Pull-high function enable
0: disable
1: enable
Rev. 1.10
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HT46R064/065/066/0662/067
¨
HT46R0662/HT46R067
Bit
Register
Name
POR
7
6
5
4
3
2
1
0
PAWK
00H
PAWK7
PAWK6
PAWK5
PAWK4
PAWK3
PAWK2
PAWK1
PAWK0
PAC
FFH
PAC7
PAC6
PAC5
PAC4
PAC3
PAC2
PAC1
PAC0
PAPU0
PAPU
00H
¾
PAPU6
PAPU5
PAPU4
PAPU3
PAPU2
PAPU1
PBC
FFH
PBC7
PBC6
PBC5
PBC4
PBC3
PBC2
PBC1
PBC0
PBPU
00H
PBPU7
PBPU6
PBPU5
PBPU4
PBPU3
PBPU2
PBPU1
PBPU0
PCC
FFH
PCC7
PCC6
PCC5
PCC4
PCC3
PCC2
PCC1
PCC0
PCPU
00H
PCPU7
PCPU6
PCPU5
PCPU4
PCPU3
PCPU2
PCPU1
PCPU0
PDC
FFH
PDC7
PDC6
PDC5
PDC4
PDC3
PDC2
PDC1
PDC0
PDPU
00H
PDPU7
PDPU6
PDPU5
PDPU4
PDPU3
PDPU2
PDPU1
PDPU0
PEC
FFH
PEC7
PEC6
PEC5
PEC4
PEC3
PEC2
PEC1
PEC0
PEPU
00H
PEPU7
PEPU6
PEPU5
PEPU4
PEPU3
PEPU2
PEPU1
PEPU0
PFC
03H
¾
¾
¾
¾
¾
¾
PFC1
PFC0
PFPU
00H
¾
¾
¾
¾
¾
¾
PFPU1
PFPU0
²¾² Unimplemented, read as ²0²
PAWKn: PA wake-up function enable
0: disable
1: enable
PACn/PBCn/PCCn/PDCn/PECn/PFCn: I/O type selection
0: output
1: input
PAPUn/PBPUn/PCPUn/PDPUn/PEPUn/PFPUn: Pull-high function enable
0: disable
1: enable
I/O Port Control Registers
multi-function I/O pins is set by configuration options
while for others the function is set by application program control.
Each Port has its own control register, known as PAC,
PBC, PCC, PDC, PEC, PFC which controls the input/output configuration. With this control register, each
I/O pin with or without pull-high resistors can be reconfigured dynamically under software control. For the I/O
pin to function as an input, the corresponding bit of the
control register must be written as a ²1². This will then
allow the logic state of the input pin to be directly read by
instructions. When the corresponding bit of the control
register is written as a ²0², the I/O pin will be setup as a
CMOS output. If the pin is currently setup as an output,
instructions can still be used to read the output register.
However, it should be noted that the program will in fact
only read the status of the output data latch and not the
actual logic status of the output pin.
· External Interrupt Input
The external interrupt pin, INT, is pin-shared with an
I/O pin. To use the pin as an external interrupt input
the correct bits in the INTC0 register must be programmed. The pin must also be setup as an input by
setting the PAC3 bit in the Port Control Register. A
pull-high resistor can also be selected via the appropriate port pull-high resistor register. Note that even if
the pin is setup as an external interrupt input the I/O
function still remains.
· External Timer/Event Counter Input
The Timer/Event Counter pins, TC0, TC1 and TC2 are
pin-shared with I/O pins. For these shared pins to be
used as Timer/Event Counter inputs, the Timer/Event
Counter must be configured to be in the Event Counter or Pulse Width Capture Mode. This is achieved by
setting the appropriate bits in the Timer/Event Counter
Control Register. The pins must also be setup as inputs by setting the appropriate bit in the Port Control
Register. Pull-high resistor options can also be selected using the port pull-high resistor registers. Note
that even if the pin is setup as an external timer input
the I/O function still remains.
Pin-shared Functions
The flexibility of the microcontroller range is greatly enhanced by the use of pins that have more than one function. Limited numbers of pins can force serious design
constraints on designers but by supplying pins with
multi-functions, many of these difficulties can be overcome. For some pins, the chosen function of the
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HT46R064/065/066/0662/067
· PFD Output
Pin Remapping Configuration HT46R066/HT46R0662/HT46R067
The PFD function output is pin-shared with an I/O pin.
The output function of this pin is chosen using the
CTRL0 register. Note that the corresponding bit of
the port control register, must setup the pin as an
output to enable the PFD output. If the port control
register has setup the pin as an input, then the pin will
function as a normal logic input with the usual
pull-high selection, even if the PFD function has been
selected.
The pin remapping function enables the function pins
INT, TC0 and PFD to be located on different port pins. It
is important not to confuse the Pin Remapping function
with the Pin-shared function, these two functions have
no interdependence.
The PCFG bit in the CTRL0 register allows the three
function pins INT, TC0 and PFD to be remapped to different port pins. After power up, this bit will be reset to
zero, which will define the default port pins to which
these three functions will be mapped. Changing this bit
will move the functions to other port pins.
· PWM Outputs
The PWM function whose outputs are pin-shared with
I/O pins. The PWM output functions are chosen using
the CTRL0 and CTRL2 registers. Note that the corresponding bit of the port control registers, for the output
pin, must setup the pin as an output to enable the
PWM output. If the pins are setup as inputs, then the
pin will function as a normal logic input with the usual
pull-high selections, even if the PWM registers have
enabled the PWM function.
Examination of the pin names on the package diagrams
will reveal that some pin function names are repeated,
this indicates a function pin that can be remapped to
other port pins. If the pin name is bracketed then this indicates its alternative location. Pin names without brackets indicates its default location which is the condition
after Power-on.
· SCOM Driver Pins
Pins PB0~PB3 on Port B can be used as LCD COM
driver pins. This function is controlled using the
SCOMC register which will generate the necessary
1/2 bias signals on these four pins.
PCFG Bit Status
PCFG Bit
0
1
Pin Mapping
INT/PA3
TC0/PA2
PFD/PA1
[INT]/PB5
[TC0]/PB4
[PFD]/PB3
· A/D Inputs
Each device in this series has either four or eight inputs to the A/D converter. All of these analog inputs
are pin-shared with I/O pins. If these pins are to be
used as A/D inputs and not as I/O pins then the corresponding PCRn bits in the A/D converter control register, ADCR, must be properly setup. There are no
configuration options associated with the A/D converter. If chosen as I/O pins, then full pull-high resistor
configuration options remain, however if used as A/D
inputs then any pull-high resistor configuration options
associated with these pins will be automatically disconnected.
Pin Remapping
I/O Pin Structures
The diagrams illustrate the I/O pin internal structures. As
the exact logical construction of the I/O pin may differ
from these drawings, they are supplied as a guide only
to assist with the functional understanding of the I/O
pins.
V
P u ll- H ig h
S e le c t
C o n tr o l B it
D a ta B u s
W r ite C o n tr o l R e g is te r
Q
D
W r ite D a ta R e g is te r
S
I/O
S y s te m
p in
D a ta B it
Q
D
C K
Q
S
R e a d D a ta R e g is te r
W e a k
P u ll- u p
Q
C K
C h ip R e s e t
R e a d C o n tr o l R e g is te r
D D
M
U
X
P A o n ly
W a k e -u p
W a k e - u p S e le c t
Generic Input/Output Ports
Rev. 1.10
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HT46R064/065/066/0662/067
C o n tr o l B it
Q
D
D a ta B u s
W r ite C o n tr o l R e g is te r
C K
Q
S
C h ip R e s e t
P A 7 /R E S
R e a d C o n tr o l R e g is te r
D a ta B it
Q
D
W r ite D a ta R e g is te r
C K
S
Q
M
R e a d D a ta R e g is te r
S y s te m
U
X
W a k e -u p (P A 7 )
P A W K 7
R E S fo r P A 7 o n ly
PA7 NMOS Input/Output Port
V
P u ll- H ig h
S e le c t
D a ta B u s
W r ite C o n tr o l R e g is te r
C o n tr o l B it
Q
D
D D
W e a k
P u ll- u p
Q
C K
S
C h ip R e s e t
R e a d C o n tr o l R e g is te r
W r ite D a ta R e g is te r
P B 0 /S C O M 0 ~
P B 3 /S C O M 3
P B 4 ,P B 5
D a ta B it
Q
D
Q
C K
S
M
R e a d D a ta R e g is te r
U
X
V
D D
/2
C O M n E N
S C O M E N
PB Input/Output Port
Rev. 1.10
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HT46R064/065/066/0662/067
Configuring the Timer/Event Counter Input Clock
Source
Programming Considerations
Within the user program, one of the first things to consider is port initialisation. After a reset, the I/O data register and I/O port control register will be set high. This
means that all I/O pins will default to an input state, the
level of which depends on the other connected circuitry
and whether pull-high options have been selected. If the
port control registers, are then programmed to setup
some pins as outputs, these output pins will have an initial high output value unless the associated port data
register is first programmed. Selecting which pins are inputs and which are outputs can be achieved byte-wide
by loading the correct value into the port control register
or by programming individual bits in the port control register using the ²SET [m].i² and ²CLR [m].i² instructions.
Note that when using these bit control instructions, a
read-modify-write operation takes place. The
microcontroller must first read in the data on the entire
port, modify it to the required new bit values and then rewrite this data back to the output ports.
T 1
S y s te m
T 2
T 3
T 4
T 1
T 2
T 3
The Timer/Event Counter clock source can originate
from various sources, an internal clock or an external
pin. The internal clock source source is used when the
timer is in the timer mode or in the pulse width capture
mode. For some Timer/Event Counters, this internal
clock source is first divided by a prescaler, the division
ratio of which is conditioned by the Timer Control Register bits T0PSC0~T0PSC2 or T2PSC0~ T2PSC2. For
Timer/Event Counter 0, the internal clock source can be
either fSYS or the LXT Oscillator, the choice of which is
determined by the T0S bit in the TMR0C register.
An external clock source is used when the timer is in the
event counting mode, the clock source being provided
on an external timer pin TCn. Depending upon the condition of the TnEG bit, each high to low, or low to high
transition on the external timer pin will increment the
counter by one.
Timer Registers - TMR0, TMR1, TMR2
T 4
C lo c k
The timer registers are special function registers located
in the Special Purpose Data Memory and is the place
where the actual timer value is stored. These registers
are known as TMR0, TMR1 and TMR2. The value in the
timer registers increases by one each time an internal
clock pulse is received or an external transition occurs
on the external timer pin. The timer will count from the
initial value loaded by the preload register to the full
count of FFH at which point the timer overflows and an
internal interrupt signal is generated. The timer value
will then be reset with the initial preload register value
and continue counting.
P o rt D a ta
R e a d fro m
P o rt
W r ite to P o r t
Read Modify Write Timing
Pins PA0 to PA7 each have a wake-up functions, selected via the PAWK register. When the device is in the
Idle/Sleep Mode, various methods are available to wake
the device up. One of these is a high to low transition of
any of the these pins. Single or multiple pins on Port A
can be setup to have this function.
Note that to achieve a maximum full range count of FFH,
the preload register must first be cleared to all zeros. It
should be noted that after power-on, the preload registers will be in an unknown condition. Note that if the
Timer/Event Counter is in an OFF condition and data is
written to its preload register, this data will be immediately written into the actual counter. However, if the
counter is enabled and counting, any new data written
into the preload data register during this period will remain in the preload register and will only be written into
the actual counter the next time an overflow occurs.
Timer/Event Counters
The provision of timers form an important part of any
microcontroller, giving the designer a means of carrying
out time related functions. The devices contain from one
to three count-up timer of 8-bit capacity. As the timers
have three different operating modes, they can be configured to operate as a general timer, an external event
counter or as a pulse width capture device. The provision of an internal prescaler to the clock circuitry on
gives added range to the timers.
There are two types of registers related to the
Timer/Event Counters. The first is the register that contains the actual value of the timer and into which an initial value can be preloaded. Reading from this register
retrieves the contents of the Timer/Event Counter. The
second type of associated register is the Timer Control
Register which defines the timer options and determines how the timer is to be used. The device can have
the timer clock configured to come from the internal
clock source. In addition, the timer clock source can also
be configured to come from an external timer pin.
Rev. 1.10
Timer Control Registers - TMR0C, TMR1C, TMR2C
The flexible features of the Holtek microcontroller
Timer/Event Counters enable them to operate in three
different modes, the options of which are determined by
the contents of their respective control register.
The Timer Control Register is known as TMRnC. It is the
Timer Control Register together with its corresponding
timer register that control the full operation of the
Timer/Event Counter. Before the timer can be used, it is
essential that the Timer Control Register is fully pro-
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HT46R064/065/066/0662/067
P W M
P W M C 0
P W M C 1
P W M C 2
C o n tro l
P W M 0 , P W M 1 , P W M 2
T im e - B a s e e v e n t in te r r u p t P e r io d
1
(2 10 ~ 2 13 ) *
fT P
T im e - B a s e C o n tr o l
T 0 S
fS
Y S
fL
X T
0
M U X
1
fT
T 0 P S C
[2 :0 ]
P
7 S ta g e C o u n te r
7
T o T im e r 0 in te r n a l c lo c k
(fT 0 C K = fT P ~ fT P /1 2 8 )
8 -1 M U X
7
T 2 P S C
T o T im e r 2 in te r n a l c lo c k
(fT 2 C K = fT P ~ fT P /1 2 8 )
8 -1 M U X
[2 :0 ]
Clock Structure for Timer/PWM/Time Base
D a ta B u s
T 0 M 1 , T 0 M 0
T im e r 0 In te r n a l C lo c k
(fT 0 C K )
P r e lo a d R e g is te r
M o d e C o n tro l
T 0 O V
O v e r flo w
to In te rru p t
U p C o u n te r
T C 0
T 0 O N
T 0 E G
¸
P F D 0
2
8-bit Timer/Event Counter 0 Structure
D a ta B u s
T 1 M 1 , T 1 M 0
fS Y S /4
L X T O s c illa to r
M
U
X
P r e lo a d R e g is te r
M o d e C o n tro l
T 1 O V
T 1 S
O v e r flo w
to In te rru p t
U p C o u n te r
T C 1
T 1 O N
T 1 E G
¸
P F D 1
2
8-bit Timer/Event Counter 1 Structure
D a ta B u s
T 2 M 1 , T 2 M 0
T im e r 2 In te r n a l C lo c k
(fT 2 C K )
P r e lo a d R e g is te r
M o d e C o n tro l
T 2 O V
T C 2
U p C o u n te r
T 2 O N
T 2 E G
O v e r flo w
to In te rru p t
8-bit Timer/Event Counter 2 Structure
P F D C S
P F D 0
0
P F D 1
1
M U X
P F D
o u tp u t
Note: If PWM0/PWM1/PWM2 is enabled, then fTP comes from fSYS (ignore T0S)
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HT46R064/065/066/0662/067
· TMR0C Register
Bit
7
6
5
4
3
2
1
0
Name
T0M1
T0M0
T0S
T0ON
T0EG
T0PSC2
T0PSC1
T0PSC0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
0
0
0
1
0
0
0
Bit 7,6
T0M1, T0M0: Timer0 operation mode selection
00: no mode available
01: event counter mode
10: timer mode
11: pulse width capture mode
Bit 5
T0S: timer clock source
0: fSYS
1: LXT oscillator
T0S selects the clock source for fTP which is provided for Timer 0, Timer 2, the Time-Base and
the PWM. If the PWM is enabled, then fSYS will be selected, overriding the T0S selection.
Bit 4
T0ON: Timer/event counter counting enable
0: disable
1: enable
Bit 3
T0EG:
Event counter active edge selection
0: count on raising edge
1: count on falling edge
Pulse Width Capture active edge selection
0: start counting on falling edge, stop on rasing edge
1: start counting on raising edge, stop on falling edge
Bit 2~0
T0PSC2, T0PSC1, T0PSC0: Timer prescaler rate selection
Timer internal clock=
000: fTP
001: fTP/2
010: fTP/4
011: fTP/8
100: fTP/16
101: fTP/32
110: fTP/64
111: fTP/128
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HT46R064/065/066/0662/067
· TMR1C Register
Bit
7
6
5
4
3
2
1
0
Name
T1M1
T1M0
T1S
T1ON
T1EG
¾
¾
¾
R/W
R/W
R/W
R/W
R/W
R/W
¾
¾
¾
POR
0
0
0
0
1
¾
¾
¾
Bit 7,6
T1M1, T1M0: Timer 1 Operation mode selection
00: no mode available
01: event counter mode
10: timer mode
11: pulse width capture mode
Bit 5
T1S: timer clock source
0: fSYS/4
1: LXT oscillator
T1ON: Timer/event counter counting enable
0: disable
1: enable
Bit 4
Bit 3
T1EG:
Event counter active edge selection
0: count on raising edge
1: count on falling edge
Pulse Width Capture active edge selection
0: start counting on falling edge, stop on rasing edge
1: start counting on raising edge, stop on falling edge
Bit 2~0
unimplemented, read as ²0²
· TMR2C Register
Bit
7
6
5
4
3
2
1
0
Name
T2M1
T2M0
¾
T2ON
T2EG
T2PSC2
T2PSC1
T2PSC0
R/W
R/W
R/W
¾
R/W
R/W
R/W
R/W
R/W
POR
0
0
¾
0
1
0
0
0
Bit 7, 6
T2M1, T2M0: Timer 2 Operation mode selection
00: no mode available
01: event counter mode
10: timer mode
11: pulse width capture mode
Bit 5
unimplemented, read as ²0²
Bit 4
T2ON: Timer/event counter counting enable
0: disable
1: enable
Bit 3
T2EG:
Event counter active edge selection
0: count on raising edge
1: count on falling edge
Pulse Width Capture active edge selection
0: start counting on falling edge, stop on rasing edge
1: start counting on raising edge, stop on falling edge
Bit 2~0
T2PSC2, T2PSC1, T2PSC0: Timer prescaler rate selection
Timer internal clock=
000: fTP
001: fTP/2
010: fTP/4
011: fTP/8
100: fTP/16
101: fTP/32
110: fTP/64
111: fTP/128
Rev. 1.10
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HT46R064/065/066/0662/067
counting. A timer overflow condition and corresponding
internal interrupt is one of the wake-up sources, however, the internal interrupts can be disabled by ensuring
that the ETnI bits of the INTCn register are reset to zero.
grammed with the right data to ensure its correct operation, a process that is normally carried out during
program initialisation.
To choose which of the three modes the timer is to operate in, either in the timer mode, the event counting mode
or the pulse width capture mode, bits 7 and 6 of the
Timer Control Register, which are known as the bit pair
TnM1/TnM0, must be set to the required logic levels.
The timer-on bit, which is bit 4 of the Timer Control Register and known as TnON, provides the basic on/off control of the respective timer. Setting the bit high allows the
counter to run, clearing the bit stops the counter. Bits
0~2 of the Timer Control Register determine the division
ratio of the input clock prescaler. The prescaler bit settings have no effect if an external clock source is used. If
the timer is in the event count or pulse width capture
mode, the active transition edge level type is selected by
the logic level of bit 3 of the Timer Control Register
which is known as TnEG. The TnS bit selects the internal clock source if used.
Event Counter Mode
In this mode, a number of externally changing logic
events, occurring on the external timer TCn pin, can be
recorded by the Timer/Event Counter. To operate in this
mode, the Operating Mode Select bit pair, TnM1/TnM0,
in the Timer Control Register must be set to the correct
value as shown.
Control Register Operating Mode
Select Bits for the Event Counter Mode
In this mode, the Timer/Event Counter can be utilised to
measure fixed time intervals, providing an internal interrupt signal each time the Timer/Event Counter overflows. To operate in this mode, the Operating Mode
Select bit pair, TnM1/TnM0, in the Timer Control Register must be set to the correct value as shown.
Bit7 Bit6
1
0
1
In this mode, the external timer TCn pin, is used as the
Timer/Event Counter clock source, however it is not divided by the internal prescaler. After the other bits in the
Timer Control Register have been setup, the enable bit
TnON, which is bit 4 of the Timer Control Register, can
be set high to enable the Timer/Event Counter to run. If
the Active Edge Select bit, TnEG, which is bit 3 of the
Timer Control Register, is low, the Timer/Event Counter
will increment each time the external timer pin receives
a low to high transition. If the TnEG is high, the counter
will increment each time the external timer pin receives
a high to low transition. When it is full and overflows, an
interrupt signal is generated and the Timer/Event Counter will reload the value already loaded into the preload
register and continue counting. The interrupt can be disabled by ensuring that the Timer/Event Counter Interrupt Enable bit in the corresponding Interrupt Control
Register, is reset to zero.
Timer Mode
Control Register Operating Mode
Select Bits for the Timer Mode
Bit7 Bit6
0
In this mode the internal clock is used as the timer clock.
The timer input clock source is either fSYS , fSYS/4 or the
LXT oscillator. However, this timer clock source is further divided by a prescaler, the value of which is determined by the bits TnPSC2~TnPSC0 in the Timer
Control Register. The timer-on bit, TnON must be set
high to enable the timer to run. Each time an internal
clock high to low transition occurs, the timer increments
by one; when the timer is full and overflows, an interrupt
signal is generated and the timer will reload the value already loaded into the preload register and continue
As the external timer pin is shared with an I/O pin, to ensure that the pin is configured to operate as an event
counter input pin, two things have to happen. The first is
to ensure that the Operating Mode Select bits in the
Timer Control Register place the Timer/Event Counter in
the Event Counting Mode, the second is to ensure that
the port control register configures the pin as an input. It
should be noted that in the event counting mode, even if
the microcontroller is in the Idle/Sleep Mode, the
P r e s c a le r O u tp u t
In c re m e n t
T im e r C o n tr o lle r
T im e r + 1
T im e r + 2
T im e r + N
T im e r + N + 1
Timer Mode Timing Chart
E x te rn a l E v e n t
In c re m e n t
T im e r C o u n te r
T im e r + 1
T im e r + 2
T im e r + 3
Event Counter Mode Timing Chart (TnEG=1)
Rev. 1.10
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The residual value in the Timer/Event Counter, which
can now be read by the program, therefore represents
the length of the pulse received on the TCn pin. As the
enable bit has now been reset, any further transitions on
the external timer pin will be ignored. The timer cannot
begin further pulse width capture until the enable bit is
set high again by the program. In this way, single shot
pulse measurements can be easily made.
Timer/Event Counter will continue to record externally
changing logic events on the timer input TCn pin. As a
result when the timer overflows it will generate a timer
interrupt and corresponding wake-up source.
Pulse Width Capture Mode
In this mode, the Timer/Event Counter can be utilised to
measure the width of external pulses applied to the external timer pin. To operate in this mode, the Operating
Mode Select bit pair, TnM1/TnM0, in the Timer Control
Register must be set to the correct value as shown.
Control Register Operating Mode
Select Bits for the Pulse Width
Capture Mode
It should be noted that in this mode the Timer/Event
Counter is controlled by logical transitions on the external
timer pin and not by the logic level. When the Timer/Event
Counter is full and overflows, an interrupt signal is generated and the Timer/Event Counter will reload the value already loaded into the preload register and continue
counting. The interrupt can be disabled by ensuring that
the Timer/Event Counter Interrupt Enable bit in the corresponding Interrupt Control Register, is reset to zero.
Bit7 Bit6
1
1
In this mode the internal clock, fSYS , fSYS/4 or the LXT, is
used as the internal clock for the 8-bit Timer/Event
Counter. However, the clock source, fSYS, for the 8-bit
timer is further divided by a prescaler, the value of which
is determined by the Prescaler Rate Select bits
TnPSC2~TnPSC0, which are bits 2~0 in the Timer Control Register. After the other bits in the Timer Control
Register have been setup, the enable bit TnON, which is
bit 4 of the Timer Control Register, can be set high to enable the Timer/Event Counter, however it will not actually start counting until an active edge is received on the
external timer pin.
As the TCn pin is shared with an I/O pin, to ensure that
the pin is configured to operate as a pulse width capture
pin, two things have to happen. The first is to ensure that
the Operating Mode Select bits in the Timer Control
Register place the Timer/Event Counter in the pulse
width capture Mode, the second is to ensure that the
port control register configures the pin as an input.
Prescaler
Bits TnPSC0~TnPSC2 of the TMRnC register can be
used to define a division ratio for the internal clock
source of the Timer/Event Counter enabling longer time
out periods to be setup.
If the Active Edge Select bit TnEG, which is bit 3 of the
Timer Control Register, is low, once a high to low transition has been received on the external timer pin, the
Timer/Event Counter will start counting until the external
timer pin returns to its original high level. At this point the
enable bit will be automatically reset to zero and the
Timer/Event Counter will stop counting. If the Active
Edge Select bit is high, the Timer/Event Counter will begin counting once a low to high transition has been received on the external timer pin and stop counting when
the external timer pin returns to its original low level. As
before, the enable bit will be automatically reset to zero
and the Timer/Event Counter will stop counting. It is important to note that in the pulse width capture Mode, the
enable bit is automatically reset to zero when the external control signal on the external timer pin returns to its
original level, whereas in the other two modes the enable bit can only be reset to zero under program control.
PFD Function
The Programmable Frequency Divider provides a
means of producing a variable frequency output suitable
for applications, such as piezo-buzzer driving or other
interfaces requiring a precise frequency generator.
The Timer/Event Counter overflow signal is the clock
source for the PFD function, which is controlled by
PFDCS bit in CTRL0. For applicable devices the clock
source can come from either Timer/Event Counter 0 or
Timer/Event Counter 1. The output frequency is controlled by loading the required values into the timer
prescaler and timer registers to give the required division
ratio. The counter will begin to count-up from this preload
register value until full, at which point an overflow signal is
E x te rn a l T C n
P in In p u t
T n O N - w ith T n E = 0
P r e s c a le r O u tp u t
In c re m e n t
T im e r C o u n te r
T im e r
+ 1
+ 2
+ 3
+ 4
P r e s c a le r O u tp u t is s a m p le d a t e v e r y fa llin g e d g e o f T 1 .
Pulse Width Capture Mode Timing Chart (TnE=0)
Rev. 1.10
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HT46R064/065/066/0662/067
T im e r O v e r flo w
P F D
C lo c k
P A 1 D a ta
P F D
O u tp u t a t P A 1
PFD Function
is an external event and not synchronised with the internal system or timer clock.
generated, causing both the PFD outputs to change
state. The counter will then be automatically reloaded
with the preload register value and continue counting-up.
When the Timer/Event Counter is read, or if data is written to the preload register, the clock is inhibited to avoid
errors, however as this may result in a counting error, this
should be taken into account by the programmer. Care
must be taken to ensure that the timers are properly initialised before using them for the first time. The associated timer enable bits in the interrupt control register must
be properly set otherwise the internal interrupt associated
with the timer will remain inactive. The edge select, timer
mode and clock source control bits in timer control register must also be correctly set to ensure the timer is properly configured for the required application. It is also
important to ensure that an initial value is first loaded into
the timer registers before the timer is switched on; this is
because after power-on the initial values of the timer registers are unknown. After the timer has been initialised
the timer can be turned on and off by controlling the enable bit in the timer control register.
If the CTRL0 register has selected the PFD function,
then for PFD output to operate, it is essential for the Port
A control register PAC, to setup the PFD pins as outputs.
PA1 must be set high to activate the PFD. The output
data bits can be used as the on/off control bit for the PFD
outputs. Note that the PFD outputs will all be low if the
output data bit is cleared to zero.
Using this method of frequency generation, and if a
crystal oscillator is used for the system clock, very precise values of frequency can be generated.
I/O Interfacing
The Timer/Event Counter, when configured to run in the
event counter or pulse width capture mode, requires the
use of an external timer pin for its operation. As this pin is
a shared pin it must be configured correctly to ensure that
it is setup for use as a Timer/Event Counter input pin. This
is achieved by ensuring that the mode select bits in the
Timer/Event Counter control register, select either the
event counter or pulse width capture mode. Additionally
the corresponding Port Control Register bit must be set
high to ensure that the pin is setup as an input. Any
pull-high resistor connected to this pin will remain valid
even if the pin is used as a Timer/Event Counter input.
When the Timer/Event Counter overflows, its corresponding interrupt request flag in the interrupt control
register will be set. If the Timer/Event Counter interrupt
is enabled this will in turn generate an interrupt signal.
However irrespective of whether the interrupts are enabled or not, a Timer/Event Counter overflow will also
generate a wake-up signal if the device is in a
Power-down condition. This situation may occur if the
Timer/Event Counter is in the Event Counting Mode and
if the external signal continues to change state. In such
a case, the Timer/Event Counter will continue to count
these external events and if an overflow occurs the device will be woken up from its Power-down condition. To
prevent such a wake-up from occurring, the timer interrupt request flag should first be set high before issuing
the ²HALT² instruction to enter the Idle/Sleep Mode.
Programming Considerations
When configured to run in the timer mode, the internal
system clock is used as the timer clock source and is
therefore synchronised with the overall operation of the
microcontroller. In this mode when the appropriate timer
register is full, the microcontroller will generate an internal
interrupt signal directing the program flow to the respective internal interrupt vector. For the pulse width capture
mode, the internal system clock is also used as the timer
clock source but the timer will only run when the correct
logic condition appears on the external timer input pin. As
this is an external event and not synchronised with the internal timer clock, the microcontroller will only see this external event when the next timer clock pulse arrives. As a
result, there may be small differences in measured values requiring programmers to take this into account during programming. The same applies if the timer is
configured to be in the event counting mode, which again
Rev. 1.10
Timer Program Example
The program shows how the Timer/Event Counter registers are setup along with how the interrupts are enabled
and managed. Note how the Timer/Event Counter is
turned on, by setting bit 4 of the Timer Control Register.
The Timer/Event Counter can be turned off in a similar
way by clearing the same bit. This example program sets
the Timer/Event Counters to be in the timer mode, which
uses the internal system clock as their clock source.
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· PFD Programming Example
org 04h
; external interrupt vector
org 08h
; Timer Counter 0 interrupt vector
jmp tmr0int
; jump here when Timer 0 overflows
:
:
org 20h
; main program
:
:
;internal Timer 0 interrupt routine
tmr0int:
:
; Timer 0 main program placed here
:
:
begin:
;setup Timer 0 registers
mov a,09bh
; setup Timer 0 preload value
mov tmr0,a
mov a,081h
; setup Timer 0 control register
mov tmr0c,a
; timer mode and prescaler set to /2
;setup interrupt register
mov a,00dh
; enable master interrupt and both timer interrupts
mov intc0,a
:
:
set tmr0c.4
; start Timer 0
:
:
Time Base
The device includes a Time Base function which is used to generate a regular time interval signal.
The Time Base time interval magnitude is determined using an internal 13 stage counter sets the division ratio of the
clock source. This division ratio is controlled by both the TBSEL0 and TBSEL1 bits in the CTRL1 register. The clock
source is selected using the T0S bit in the TMR0C register.
When the Time Base time out, a Time Base interrupt signal will be generated. It should be noted that as the Time Base
clock source is the same as the Timer/Event Counter clock source, care should be taken when programming.
Rev. 1.10
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Pulse Width Modulator
essary to write the required value into the PWMn register and select the required mode setup and on/off
control using the CTRL0 and CTRL2 registers, the subdivision of the waveform into its sub-modulation cycles
is implemented automatically within the microcontroller
hardware. The PWM clock source is the system clock
fSYS. This method of dividing the original modulation cycle into a further 2 or 4 sub-cycles enable the generation
of higher PWM frequencies which allow a wider range of
applications to be served. The difference between what
is known as the PWM cycle frequency and the PWM
modulation frequency should be understood. As the
PWM clock is the system clock, fSYS, and as the PWM
value is 8-bits wide, the overall PWM cycle frequency is
fSYS/256. However, when in the 7+1 mode of operation
the PWM modulation frequency will be fSYS/128, while
the PWM modulation frequency for the 6+2 mode of operation will be fSYS/64.
Every device includes a multiple output 8-bit PWM
function. Useful for such applications such as motor
speed control, the PWM function provides outputs with a
fixed frequency but with a duty cycle that can be varied
by setting particular values into the corresponding PWM
register.
P W M 0 D u ty R e g is te r
P M W 0
8 - b it C o m p a r a to r 0
P W M 1 D u ty R e g is te r
8 - b it C o m p a r a to r 1
P M W 1
PWM
Modulation
P W M 2
R e g is te r
fSYS/64 for (6+2) bits mode
fSYS/128for (7+1) bits mode
P M W 2
8 - b it C o m p a r a to r 2
HT46R064
HT46R065
1
HT46R066
HT46R0662
2
HT46R067
3
6+2
7+1
Pins
Registers
PA4
PWM0
PA4
PC3
PWM0
PWM1
PA4
PC3
PC2
PWM0
PWM1
PWM2
Parameter
AC (0~3)
DC
(Duty Cycle)
i<AC
DC+1
64
i³AC
DC
64
PWM Operation
A single register, known as PWMn and located in the
Data Memory is assigned to each Pulse Width Modulator channel. It is here that the 8-bit value, which represents the overall duty cycle of one modulation cycle of
the output waveform, should be placed. To increase the
PWM modulation frequency, each modulation cycle is
subdivided into two or four individual modulation subsections, known as the 7+1 mode or 6+2 mode respectively. The required mode and the on/off control for each
PWM channel is selected using the CTRL0 and CTRL2
registers. Note that when using the PWM, it is only nec-
Rev. 1.10
[PWM]/256
Each full PWM cycle, as it is controlled by an 8-bit PWM
register, has 256 clock periods. However, in the 6+2
PWM mode, each PWM cycle is subdivided into four individual sub-cycles known as modulation cycle 0 ~ modulation cycle 3, denoted as i in the table. Each one of
these four sub-cycles contains 64 clock cycles. In this
mode, a modulation frequency increase of four is
achieved. The 8-bit PWM register value, which represents the overall duty cycle of the PWM waveform, is divided into two groups. The first group which consists of
bit2~bit7 is denoted here as the DC value. The second
group which consists of bit0~bit1 is known as the AC
value. In the 6+2 PWM mode, the duty cycle value of
each of the four modulation sub-cycles is shown in the
following table.
PWM Block Diagram
Channels Mode
fSYS/256
6+2 PWM Mode
8 - b it/( 7 + 1 ) /( 6 + 2 )
P W M C o u n te r
Device
PWM Cycle PWM Cycle
Frequency
Duty
Modulation cycle i
(i=0~3)
6+2 Mode Modulation Cycle Values
The following diagram illustrates the waveforms associated with the 6+2 mode of PWM operation. It is important to note how the single PWM cycle is subdivided into
4 individual modulation cycles, numbered from 0~3 and
how the AC value is related to the PWM value.
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fS
Y S
/2
[P W M ] = 1 0 0
P W M
2 5 /6 4
2 5 /6 4
2 5 /6 4
2 5 /6 4
2 5 /6 4
2 6 /6 4
2 5 /6 4
2 5 /6 4
2 5 /6 4
2 6 /6 4
2 6 /6 4
2 6 /6 4
2 5 /6 4
2 5 /6 4
2 6 /6 4
2 6 /6 4
2 6 /6 4
2 5 /6 4
2 6 /6 4
[P W M ] = 1 0 1
P W M
[P W M ] = 1 0 2
P W M
[P W M ] = 1 0 3
P W M
2 6 /6 4
P W M
m o d u la tio n p e r io d : 6 4 /fS
M o d u la tio n c y c le 0
Y S
M o d u la tio n c y c le 1
P W M
M o d u la tio n c y c le 2
c y c le : 2 5 6 /fS
M o d u la tio n c y c le 3
M o d u la tio n c y c le 0
Y S
6+2 PWM Mode
b 7
b 0
P W M
R e g is te r
A C
v a lu e
D C
v a lu e
(6 + 2 ) M o d e
PWM Register for 6+2 Mode
7+1 PWM Mode
PWM Output Control
Each full PWM cycle, as it is controlled by an 8-bit PWM
register, has 256 clock periods. However, in the 7+1
PWM mode, each PWM cycle is subdivided into two individual sub-cycles known as modulation cycle 0 ~ modulation cycle 1, denoted as i in the table. Each one of these
two sub-cycles contains 128 clock cycles. In this mode, a
modulation frequency increase of two is achieved. The
8-bit PWM register value, which represents the overall
duty cycle of the PWM waveform, is divided into two
groups. The first group which consists of bit1~bit7 is denoted here as the DC value. The second group which
consists of bit0 is known as the AC value. In the 7+1
PWM mode, the duty cycle value of each of the two modulation sub-cycles is shown in the following table.
The PWM outputs are pin-shared with the I/O pins PA4,
PC2 and PC3. To operate as a PWM output and not as
an I/O pin, the correct bits must be set in the CTRL0 and
CTRL2 register. A zero value must also be written to the
corresponding bit in the I/O port control register PAC.4,
PCC.2 and PCC.3 to ensure that the corresponding
PWM output pin is setup as an output. After these two
initial steps have been carried out, and of course after
the required PWM value has been written into the
PWMn register, writing a high value to the corresponding bit in the output data register PA.4, PC.2 and PC.3
will enable the PWM data to appear on the pin. Writing a
zero value will disable the PWM output function and
force the output low. In this way, the Port data output
registers can be used as an on/off control for the PWM
function. Note that if the CTRL0 and CTRL2 registers
have selected the PWM function, but a high value has
been written to its corresponding bit in the PAC or PCC
control register to configure the pin as an input, then the
pin can still function as a normal input line, with pull-high
resistor options.
Parameter
AC (0~1)
DC
(Duty Cycle)
i<AC
DC+1
128
i³AC
DC
128
Modulation cycle i
(i=0~1)
7+1 Mode Modulation Cycle Values
The following diagram illustrates the waveforms associated with the 7+1 mode PWM operation. It is important
to note how the single PWM cycle is subdivided into 2 individual modulation cycles, numbered 0 and 1 and how
the AC value is related to the PWM value.
Rev. 1.10
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fS
Y S
/2
[P W M ] = 1 0 0
P W M
5 0 /1 2 8
5 0 /1 2 8
5 0 /1 2 8
5 1 /1 2 8
5 0 /1 2 8
5 1 /1 2 8
5 1 /1 2 8
5 1 /1 2 8
5 1 /1 2 8
5 1 /1 2 8
5 2 /1 2 8
[P W M ] = 1 0 1
P W M
[P W M ] = 1 0 2
P W M
[P W M ] = 1 0 3
P W M
5 2 /1 2 8
P W M
m o d u la tio n p e r io d : 1 2 8 /fS
Y S
M o d u la tio n c y c le 0
M o d u la tio n c y c le 1
P W M
c y c le : 2 5 6 /fS
M o d u la tio n c y c le 0
Y S
7+1 PWM Mode
b 7
b 0
P W M
R e g is te r
A C
v a lu e
D C
v a lu e
(7 + 1 ) M o d e
PWM Register for 7+1 Mode
· PWM Programming Example
The
mov
mov
set
set
clr
set
::
clr
following sample program shows how the PWM0 output is setup and controlled.
a,64h
; setup PWM value of decimal 100
pwm0,a
ctrl0.5
; select the 7+1 PWM mode
ctrl0.3
; select pin PA4 to have a PWM function
pac.4
; setup pin PA4 as an output
pa.4
; enable the PWM output
pa.4
Rev. 1.10
; disable the PWM output_ pin
; PA4 forced low
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Analog to Digital Converter
The need to interface to real world analog signals is a
common requirement for many electronic systems.
However, to properly process these signals by a
microcontroller, they must first be converted into digital
signals by A/D converters. By integrating the A/D conversion electronic circuitry into the microcontroller, the
need for external components is reduced significantly
with the corresponding follow-on benefits of lower costs
and reduced component space requirements.
In the following table, D0~D11 is the A/D conversion
data result bits.
A/D Overview
A/D Converter Control Registers - ADCR, ACSR
The device contains an 4/8-channel analog to digital
converter which can directly interface to external analog
signals, such as that from sensors or other control signals and convert these signals directly into either a
12-bit digital value.
To control the function and operation of the A/D converter, two control registers known as ADCR and ACSR
are provided. These 8-bit registers define functions
such as the selection of which analog channel is connected to the internal A/D converter, which pins are
used as analog inputs and which are used as normal
I/Os, the A/D clock source as well as controlling the start
function and monitoring the A/D converter end of conversion status.
Part No.
Input
Channels
Conversion
Bits
Input
Pins
HT46R064
HT46R065
4
12
PA0~PA3
12
PA0~PA3
PC0~PC1
PC6~PC7
Other
Devices
8
fS
P A 0
P A 1
P A 2
P A 3
P C 0
P C 1
P C 6
P C 7
/A N
/A N
/A N
/A N
/A N
/A N
/A N
/A N
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
ADRL
D3
D2
D1
D0
¾
¾
¾
¾
ADRH
D11 D10 D9
D8
D7
D6
D5
D4
The ADCR control register also contains the
PCR2~PCR0 bits which determine which pins on
PA0~PA3, PC0, PC1, PC6, PC7 are used as analog inputs for the A/D converter and which pins are to be used
as normal I/O pins. If the 3-bit address on PCR2~PCR0
has a value of ²111², then all eight pins, namely
AN0~AN7 will all be set as analog inputs. Note that if the
PCR2~PCR0 bits are all set to zero, then all the
PA0~PA3, PC0, PC1, PC6, PC7 pins will be setup as normal I/Os.
The device, which has an internal 12-bit A/D converter,
requires two data registers, a high byte register, known
as ADRH, and a low byte register, known as ADRL. After
the conversion process takes place, these registers can
be directly read by the microcontroller to obtain the digitised conversion value. Only the high byte register,
ADRH, utilises its full 8-bit contents. The low byte register utilises only 4 bit of its 8-bit contents as it contains
only the lowest bits of the 12-bit converted value.
A D O N B B it
A /D E n a b le
Bit
6
The ACS2~ACS0 bits in the ADCR register define the
channel number. As the device contains only one actual
analog to digital converter circuit, each of the individual
8 analog inputs must be routed to the converter. It is the
function of the ACS2~ACS0 bits in the ADCR register to
determine which analog channel is actually connected
to the internal A/D converter.
A/D Converter Data Registers - ADRL, ADRH
R e g is te r
Bit
7
A/D Data Registers
The accompanying block diagram shows the overall internal structure of the A/D converter, together with its associated registers.
A C S R
Register
Y S
C lo c k
D iv id e r
¸ N
0
1
2
3
A D R L
A D C
4
A D R H
5
A /D D a ta
R e g is te r s
6
7
P C R 0 ~ P C R 2
A D C S 0 ~ A D C S 2
S T A R T
E O C B
A D C R
R e g is te r
A/D Converter Structure
Rev. 1.10
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HT46R064/065/066/0662/067
· ADRH, ADRL Register
ADRH
ADRL
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Name
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
¾
¾
¾
¾
R/W
R
R
R
R
R
R
R
R
R
R
R
R
¾
¾
¾
¾
POR
x
x
x
x
x
x
x
x
x
x
x
x
¾
¾
¾
¾
²x² unknown
unimplemented, read as ²0²
D11~D0: ADC conversion data
· ADCR Register
Bit
7
6
5
4
3
2
1
0
Name
START
EOCB
PCR2
PCR1
PCR0
ACS2
ACS1
ACS0
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
1
0
0
0
0
0
0
Bit 7
START: Start the A/D conversion
0®1®0 : start
0®1
: reset the A/D converter and set EOCB to ²1²
Bit 6
EOCB: End of A/D conversion flag
0: A/D conversion ended
1: A/D conversion in progress
Bit 5~3
PCR2~PCR0: A/D channel configuration
For HT46R064/065
000 A/D channel all off - ADC module power down
001 PA0 enabled as AN0
010 PA0~PA1 enabled as AN0~AN1
011 PA0~PA2 enabled as AN0~AN2
1xx PA0~PA3 enabled as AN0~AN3
For HT46R066/0662/067
000 A/D channel all off - ADC module power down
001 PA0 enabled as AN0
010 PA0~PA1 enabled as AN0~AN1
011 PA0~PA2 enabled as AN0~AN2
100 PA0~PA3 enabled as AN0~AN3
101 PA0~PA3,PC0 enabled as AN0~AN4
110 PA0~PA3,PC0,PC1 enabled as AN0~AN5
111 PA0~PA3,PC0,PC1,PC6,PC7 enabled as AN0~AN7
Bit 2~0
ACS2~ACS0: Select A/D channel
For HT46R064/065
000 AN0
001 AN1
010 AN2
011 AN3
1xx undefined, can¢t be used
For HT46R066/0662/067
000 AN0
001 AN1
010 AN2
011 AN3
100 AN4
101 AN5
110 AN6
111 AN7
Rev. 1.10
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· ACSR Register
Bit
7
6
5
4
3
2
1
0
Name
TEST
ADONB
¾
R/W
R/W
R/W
¾
¾
¾
ADCS2
ADCS1
ADCS0
¾
¾
R/W
R/W
R/W
POR
1
0
¾
¾
¾
0
0
0
Bit 7
TEST: for test mode use only
Bit 6
ADONB: ADC module power on/off control bit
0: ADC module power on
1: ADC module power off
Note: 1. it is recommended to set ADONB=1 before entering idle/sleep for saving power.
2. ADONB=1 will power down the ADC module.
Bit 5~3
unimplemented, read as ²0²
Bit 2~0
ADCS2~ADCS0: Select A/D converter clock source
000: system clock/2
001: system clock/8
010: system clock/32
011: undefined, can¢t be used.
100: system clock
101: system clock/4
110: system clock/16
111: undefined, can¢t be used.
Controlling the power on/off function of the A/D converter circuitry is implemented using the value of the
ADONB bit.
The START bit in the register is used to start and reset
the A/D converter. When themicrocontroller sets this bit
from low to high and then low again, an analog to digital
conversion cycle will be initiated. When the START bit is
brought from low to high but not low again, the EOCB bit
in the ADCR register will be set to a ²1² and the analog
to digital converter will be reset. It is the START bit that is
used to control the overall start operation of the internal
analog to digital converter.
Although the A/D clock source is determined by the system clock fSYS, and by bits ADCS2, ADCS1 and ADCS0,
there are some limitations on the maximum A/D clock
source speed that can be selected. As the minimum value
of permissible A/D clock period, tAD, is 0.5ms, care must be
taken for system clock speeds in excess of 4MHz. For
system clock speeds in excess of 4MHz, the ADCS2,
ADCS1 and ADCS0 bits should not be set to ²000². Doing
so will give A/D clock periods that are less than the minimum A/D clock period which may result in inaccurate A/D
conversion values. Refer to the following table for examples, where values marked with an asterisk * show where,
depending upon the device, special care must be taken,
as the values may be less than the specified minimum A/D
Clock Period.
The EOCB bit in the ADCR register is used to indicate
when the analog to digital conversion process is complete. This bit will be automatically set to ²0² by the
microcontroller after a conversion cycle has ended. In
addition, the corresponding A/D interrupt request flag
will be set in the interrupt control register, and if the interrupts are enabled, an appropriate internal interrupt signal will be generated. This A/D internal interrupt signal
will direct the program flow to the associated A/D internal interrupt address for processing. If the A/D internal
interrupt is disabled, the microcontroller can be used to
poll the EOCB bit in the ADCR register to check whether
it has been cleared as an alternative method of detecting the end of an A/D conversion cycle.
The clock source for the A/D converter, which originates
from the system clock fSYS, is first divided by a division
ratio, the value of which is determined by the ADCS2,
ADCS1 and ADCS0 bits in the ACSR register.
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A/D Clock Period (tAD)
ADCS2,
ADCS1,
ADCS0=000
(fSYS/2)
ADCS2,
ADCS1,
ADCS0=001
(fSYS/8)
ADCS2,
ADCS1,
ADCS0=010
(fSYS/32)
1MHz
2ms
8ms
2MHz
1ms
4ms
4MHz
500ns
8MHz
250ns*
12MHz
167ns*
fSYS
ADCS2,
ADCS1,
ADCS0=100
(fSYS)
ADCS2,
ADCS1,
ADCS0=101
(fSYS/4)
32ms
1ms
4ms
16ms
Undefined
16ms
500ns
2ms
8ms
Undefined
2ms
8ms
250ns*
1ms
4ms
Undefined
1ms
4ms
125ns*
500ns
2ms
Undefined
667ns
2.67ms
83ns*
333ns*
1ms
Undefined
ADCS2,
ADCS2,
ADCS1,
ADCS1,
ADCS0=110 ADCS0=011,
(fSYS/16)
111
A/D Clock Period Examples
· Step 5
A/D Input Pins
If the interrupts are to be used, the interrupt control registers must be correctly configured to ensure the A/D
converter interrupt function is active. The master interrupt control bit, EMI, the INTC0 interrupt control register must be set to ²1², the A/D converter interrupt bit,
ADE, must also be set to ²1².
All of the A/D analog input pins are pin-shared with the
I/O pins on Port A. Bits PCR2~PCR0 in the register, determine whether the input pins are setup as normal Port
A input/output pins or whether they are setup as analog
inputs. In this way, pins can be changed under program
control to change their function from normal I/O operation to analog inputs and vice versa. Pull-high resistors,
which are setup through register programming, apply to
the input pins only when they are used as normal I/O
pins, if setup as A/D inputs the pull-high resistors will be
automatically disconnected. Note that it is not necessary to first setup the A/D pin as an input in the PBC port
control register to enable the A/D input as when the
PCR2~PCR0 bits enable an A/D input, the status of the
port control register will be overridden.
· Step 6
The analog to digital conversion process can now be
initialised by setting the START bit in the ADCR register from ²0² to ²1² and then to ²0² again. Note that this
bit should have been originally set to ²0².
· Step 7
To check when the analog to digital conversion process is complete, the EOCB bit in the ADCR register
can be polled. The conversion process is complete
when this bit goes low. When this occurs the A/D data
registers ADRL and ADRH can be read to obtain the
conversion value. As an alternative method if the interrupts are enabled and the stack is not full, the program can wait for an A/D interrupt to occur.
Note: When checking for the end of the conversion
process, if the method of polling the EOCB bit in
the ADCR register is used, the interrupt enable
step above can be omitted.
Summary of A/D Conversion Steps
The following summarises the individual steps that
should be executed in order to implement an A/D conversion process.
· Step 1
Select the required A/D conversion clock by correctly
programming bits ADCS2, ADCS1 and ADCS0 in the
register.
The accompanying diagram shows graphically the various stages involved in an analog to digital conversion
process and its associated timing.
· Step 2
Select which pins are to be used as A/D inputs and
configure them as A/D input pins by correctly programming the PCR2~PCR0 bits in the ADCR register.
The setting up and operation of the A/D converter function is fully under the control of the application program as
there are no configuration options associated with the
A/D converter. After an A/D conversion process has been
initiated by the application program, the microcontroller
internal hardware will begin to carry out the conversion,
during which time the program can continue with other
functions. The time taken for the A/D conversion is 16tAD
where tAD is equal to the A/D clock period.
· Step 3
Enable the A/D by clearing the ADONB in the ACSR
register to zero.
· Step 4
Select which channel is to be connected to the internal
A/D converter by correctly programming the
ACS2~ACS0 bits which are also contained in the register.
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Programming Considerations
between the analog input value and the digitised output
value for the A/D converter.
When programming, special attention must be given to
the PCR[2:0] bits in the register. If these bits are all
cleared to zero no external pins will be selected for use
as A/D input pins allowing the pins to be used as normal
I/O pins. When this happens the internal A/D circuitry
will be power down. Setting the ADONB bit high has the
ability to power down the internal A/D circuitry, which
may be an important consideration in power sensitive
applications.
Note that to reduce the quantisation error, a 0.5 LSB offset is added to the A/D Converter input. Except for the
digitised zero value, the subsequent digitised values will
change at a point 0.5 LSB below where they would
change without the offset, and the last full scale digitised
value will change at a point 1.5 LSB below the VDD level.
A/D Programming Example
The following two programming examples illustrate how
to setup and implement an A/D conversion. In the first
example, the method of polling the EOCB bit in the
ADCR register is used to detect when the conversion
cycle is complete, whereas in the second example, the
A/D interrupt is used to determine when the conversion
is complete.
A/D Transfer Function
As the device contain a 12-bit A/D converter, its
full-scale converted digitised value is equal to FFFH.
Since the full-scale analog input value is equal to the
VDD voltage, this gives a single bit analog input value of
VDD/4096. The diagram show the ideal transfer function
P C R 2 ~
P C R 0
0 0 0 B
x x x B - P C R [2 :0 ] is n o t e q u a l to " 0 "
A D O N B
tO
A D C m o d u le
O N
N 2 S T
o n
A /D
tA
s a m p lin g tim e
A /D
tA
D C S
o ff
s a m p lin g tim e
o n
D C S
S T A R T
E O C B
A C S 2 ~
A C S 0
x x x B
P o w e r-o n
R e s e t
0 1 0 B
0 0 0 B
0 0 1 B
S ta rt o f A /D
c o n v e r s io n
S ta rt o f A /D
c o n v e r s io n
S ta rt o f A /D
c o n v e r s io n
R e s e t A /D
c o n v e rte r
R e s e t A /D
c o n v e rte r
1 : D e fin e p o r t c o n fig u r a tio n
2 : S e le c t a n a lo g c h a n n e l
A /D
N o te :
R e s e t A /D
c o n v e rte r
E n d o f A /D
c o n v e r s io n
A /D c lo c k m u s t b e fs y s , fS
tA D C S = 4 tA D
tA D C = 1 6 tA D
Y S
E n d o f A /D
c o n v e r s io n
tA D C
c o n v e r s io n tim e
/2 , fS
Y S
/4 , fS
Y S
/8 , fS
A /D
/1 6 o r fS
Y S
Y S
tA D C
c o n v e r s io n tim e
/3 2
A/D Conversion Timing
1 .5 L S B
F F F H
F F E H
F F D H
A /D C o n v e r s io n
R e s u lt
0 .5 L S B
0 3 H
0 2 H
0 1 H
0
1
2
3
4 0 9 3 4 0 9 4
4 0 9 5 4 0 9 6
(
V D D
)
4 0 9 6
A n a lo g In p u t V o lta g e
Ideal A/D Transfer Function
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Example: using an EOCB polling method to detect the end of conversion
clr EADI
; disable ADC interrupt
mov a,00000001B
mov ACSR,a
; select fSYS/8 as A/D clock and ADONB=0
mov a,00100000B
; setup ADCR register to configure Port as A/D inputs
mov ADCR,a
; and select AN0 to be connected to the A/D converter
:
:
Start_conversion:
clr START
set START
; reset A/D
clr START
; start A/D
Polling_EOC:
sz
EOCB
; poll the ADCR register EOCB bit to detect end
; of A/D conversion
jmp polling_EOC
; continue polling
mov a,ADRL
; read low byte conversion result value
mov adrl_buffer,a
; save result to user defined register
mov a,ADRH
; read high byte conversion result value
mov adrh_buffer,a
; save result to user defined register
:
jmp start_conversion
; start next A/D conversion
Note: To power off ADC module, it is necessary to set ADONB as ²1².
Example: using the interrupt method to detect the end of conversion
clr EADI
; disable ADC interrupt
mov a,00000001B
mov ACSR,a
; select fSYS/8 as A/D clock and ADONB=0
mov a,00100000B
; setup ADCR register to configure Port as A/D inputs
mov ADCR,a
; and select AN0 to be connected to the A/D
:
:
Start_conversion:
clr START
set START
; reset A/D
clr START
; start A/D
clr ADF
; clear ADC interrupt request flag
set EADI
; enable ADC interrupt
set EMI
; enable global interrupt
:
:
:
; ADC interrupt service routine
ADC_:
mov acc_stack,a
; save ACC to user defined memory
mov a,STATUS
mov status_stack,a
; save STATUS to user defined memory
:
:
mov a,ADRL
; read low byte conversion result value
mov adrl_buffer,a
; save result to user defined register
mov a,ADRH
; read high byte conversion result value
mov adrh_buffer,a
; save result to user defined register
:
:
EXIT_ISR:
mov a,status_stack
mov STATUS,a
; restore STATUS from user defined memory
mov a,acc_stack
; restore ACC from user defined memory
clr ADF
; clear ADC interrupt flag
reti
Note: To power off ADC module, it is necessary to set ADONB as ²1².
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Interrupts
Interrupts are an important part of any microcontroller
system. When an external event or an internal function
such as a Timer/Event Counter or Time Base requires
microcontroller attention, their corresponding interrupt
will enforce a temporary suspension of the main program allowing the microcontroller to direct attention to
their respective needs.
Counter will then be loaded with a new address which
will be the value of the corresponding interrupt vector.
The microcontroller will then fetch its next instruction
from this interrupt vector. The instruction at this vector
will usually be a JMP statement which will jump to another section of program which is known as the interrupt
service routine. Here is located the code to control the
appropriate interrupt. The interrupt service routine must
be terminated with a RETI instruction, which retrieves
the original Program Counter address from the stack
and allows the microcontroller to continue with normal
execution at the point where the interrupt occurred.
The devices contain a single external interrupt and multiple internal interrupts. The external interrupt is controlled by the action of the external interrupt pin, while
the internal interrupt is controlled by the Timer/Event
Counters and Time Base overflows.
The various interrupt enable bits, together with their associated request flags, are shown in the following diagram with their order of priority.
Interrupt Register
Overall interrupt control, which means interrupt enabling
and request flag setting, is controlled by using two registers, INTC0 and INTC1. By controlling the appropriate
enable bits in this registers each individual interrupt can
be enabled or disabled. Also when an interrupt occurs,
the corresponding request flag will be set by the
microcontroller. The global enable flag if cleared to zero
will disable all interrupts.
Once an interrupt subroutine is serviced, all the other interrupts will be blocked, as the EMI bit will be cleared automatically. This will prevent any further interrupt nesting
from occurring. However, if other interrupt requests occur during this interval, although the interrupt will not be
immediately serviced, the request flag will still be recorded. If an interrupt requires immediate servicing
while the program is already in another interrupt service
routine, the EMI bit should be set after entering the routine, to allow interrupt nesting. If the stack is full, the interrupt request will not be acknowledged, even if the
related interrupt is enabled, until the Stack Pointer is
decremented. If immediate service is desired, the stack
must be prevented from becoming full.
Interrupt Operation
A Timer/Event Counter overflow, a Time Base event or
an active edge on the external interrupt pin will all generate an interrupt request by setting their corresponding
request flag, if their appropriate interrupt enable bit is
set. When this happens, the Program Counter, which
stores the address of the next instruction to be executed, will be transferred onto the stack. The Program
A u to m a tic a lly D is a b le d w h e n in te r r u p t
e v e n t is s e r v ic e d E n a b le d m a n u a lly o r
a u to m a tic a lly w ith R E T I in s tr u c tio n
A u to m a tic a lly C le a r e d b y IS R
M a n u a lly S e t o r C le a r e d b y S o ftw a r e
E x te rn a l In te rru p t
R e q u e s t F la g IN T F
IN T E
E M I
T im e r /E v e n t C o u n te r 0
In te r r u p t R e q u e s t F la g T 0 F
T 0 E
E M I
T im e r /E v e n t C o u n te r 1
In te r r u p t R e q u e s t F la g T 1 F
T 1 E
E M I
T im e r /E v e n t C o u n te r 2
In te r r u p t R e q u e s t F la g T 2 F
T 2 E
E M I
A /D C o n v e r s io n
In te r r u p t R e q u e s t F la g A D F
A D E
E M I
T im e B a s e
In te r r u p t R e q u e s t F la g T B F
T B E
E M I
P r io r ity
H ig h
In te rru p t
P o llin g
L o w
Interrupt Scheme
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When an interrupt request is generated it takes 2 or 3 instruction cycle before the program jumps to the interrupt
vector. If the device is in the Sleep or Idle Mode and is
woken up by an interrupt request then it will take 3 cycles before the program jumps to the interrupt vector.
HT46R065/HT46R066/HT46R0662
Interrupt Source
Main
Program
Interrupt Request or
Interrupt Flag Set by Instruction
N
1
04H
Timer/Event Counter 0 Overflow
2
08H
Timer/Event Counter 1 Overflow
3
0CH
A/D Conversion Complete
4
10H
Time Base Overflow
5
14H
Enable Bit Set ?
HT46R067
Interrupt Source
Y
Main
Program
Priority Vector
External Interrupt
Automatically Disable Interrupt
Clear EMI & Request Flag
Wait for 2 ~ 3 Instruction Cycles
ISR Entry
Priority Vector
External Interrupt
1
04H
Timer/Event Counter 0 Overflow
2
08H
Timer/Event Counter 1 Overflow
3
0CH
Timer/Event Counter 2 Overflow
4
10H
A/D Conversion Complete
5
14H
Time Base Overflow
6
18H
In cases where both external and internal interrupts are
enabled and where an external and internal interrupt occurs simultaneously, the external interrupt will always
have priority and will therefore be serviced first. Suitable
masking of the individual interrupts using the interrupt
registers can prevent simultaneous occurrences.
RETI
(it will set EMI automatically)
Interrupt Flow
Interrupt Priority
Interrupts, occurring in the interval between the rising
edges of two consecutive T2 pulses, will be serviced on
the latter of the two T2 pulses, if the corresponding interrupts are enabled. In case of simultaneous requests, the
following table shows the priority that is applied. These
can be masked by resetting the EMI bit.
HT46R064
Interrupt Source
Priority
Vector
External Interrupt
1
04H
Timer/Event Counter 0 Overflow
2
08H
A/D Conversion Complete
3
0CH
Time Base Overflow
4
10H
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External Interrupt
The external interrupt pin is pin-shared with the I/O pin
PA3 and can only be configured as an external interrupt
pin if the corresponding external interrupt enable bit in
the INTC0 register has been set and the edge trigger
type has been selected using the CTRL1 register. The
pin must also be setup as an input by setting the corresponding PAC.3 bit in the port control register. When the
interrupt is enabled, the stack is not full and a transition
appears on the external interrupt pin, a subroutine call to
the external interrupt vector at location 04H, will take
place. When the interrupt is serviced, the external interrupt request flag, INTF, will be automatically reset and
the EMI bit will be automatically cleared to disable other
interrupts. Note that any pull-high resistor connections
on this pin will remain valid even if the pin is used as an
external interrupt input.
For an external interrupt to occur, the global interrupt enable bit, EMI, and external interrupt enable bit, INTE,
must first be set. An actual external interrupt will take
place when the external interrupt request flag, INTF, is
set, a situation that will occur when an edge transition
appears on the external INT line. The type of transition
that will trigger an external interrupt, whether high to low,
low to high or both is determined by the INTEG0 and
INTEG1 bits, which are bits 6 and 7 respectively, in the
CTRL1 control register. These two bits can also disable
the external interrupt function.
INTEG1
INTEG0
0
0
External interrupt disable
Edge Trigger Type
0
1
Rising edge Trigger
1
0
Falling edge Trigger
1
1
Both edge Trigger
· HT46R064
¨
INTC0 Register
Bit
7
6
5
4
3
2
1
0
Name
¾
ADF
T0F
INTF
ADE
T0E
INTE
EMI
R/W
¾
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
¾
0
0
0
0
0
0
0
Bit 7
unimplemented, read as ²0²
Bit 6
ADF: A/D Conversion interrupt request flag
0: inactive
1: active
Bit 5
T0F: Timer/Event Counter 0 interrupt request flag
0: inactive
1: active
Bit 4
INTF: External interrupt request flag
0: inactive
1: active
Bit 3
ADE: A/D Conversion interrupt enable
0: disable
1: enable
Bit 2
T0E: Timer/Event Counter 0 interrupt enable
0: disable
1: enable
Bit 1
INTE: external interrupt enable
0: disable
1: enable
Bit 0
EMI: Master interrupt global enable
0: disable
1: enable
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¨
INTC1 Register
Bit
7
6
5
4
Name
¾
¾
¾
TBF
¾
¾
¾
TBE
R/W
¾
¾
¾
R/W
¾
¾
¾
R/W
POR
¾
¾
¾
0
¾
¾
¾
0
3
2
1
0
Bit 7~5,3~1
unimplemented, read as ²0²
Bit 4
TBF: Time Base event interrupt request flag
0: inactive
1: active
Bit 0
TBE: Time base event interrupt enable
0: disable
1: enable
3
2
1
0
· HT46R065/HT46R066/HT46R0662
¨
INTC0 Register
Bit
7
6
5
4
Name
¾
T1F
T0F
INTF
T1E
T0E
INTE
EMI
R/W
¾
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
¾
0
0
0
0
0
0
0
Bit 7
unimplemented, read as ²0²
Bit 6
T1F: Timer/Event Counter 1 interrupt request flag
0: inactive
1: active
Bit 5
T0F: Timer/Event Counter 0 interrupt request flag
0: inactive
1: active
Bit 4
INTF: External interrupt request flag
0: inactive
1: active
Bit 3
T1E: Timer/Event Counter 1 interrupt enable
0: disable
1: enable
Bit 2
T0E: Timer/Event Counter 0 interrupt enable
0: disable
1: enable
Bit 1
INTE: external interrupt enable
0: disable
1: enable
Bit 0
EMI: Master interrupt global enable
0: disable
1: enable
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¨
INTC1 Register
Bit
7
6
5
4
3
2
1
0
Name
¾
¾
TBF
ADF
¾
¾
TBE
ADE
R/W
¾
¾
R/W
R/W
¾
¾
R/W
R/W
POR
¾
¾
0
0
¾
¾
0
0
3
2
1
0
Bit 7~6,3~2
unimplemented, read as ²0²
Bit 5
TBF: Time Base event interrupt request flag
0: inactive
1: active
Bit 4
ADF: A/D Conversion interrupt request flag
0: inactive
1: active
Bit 1
TBE: Time base event interrupt enable
0: disable
1: enable
Bit 0
ADE: A/D Conversion interrupt enable
0: disable
1: enable
· HT46R067
¨
INTC0 Register
Bit
7
Name
¾
R/W
POR
6
5
4
T1F
T0F
INTF
T1E
T0E
INTE
EMI
¾
R/W
R/W
R/W
R/W
R/W
R/W
R/W
¾
0
0
0
0
0
0
0
Bit 7
unimplemented, read as ²0²
Bit 6
T1F: Timer/Event Counter 1 interrupt request flag
0: inactive
1: active
Bit 5
T0F: Timer/Event Counter 0 interrupt request flag
0: inactive
1: active
Bit 4
INTF: External interrupt request flag
0: inactive
1: active
Bit 3
T1E: Timer/Event Counter 1 interrupt enable
0: disable
1: enable
Bit 2
T0E: Timer/Event Counter 0 interrupt enable
0: disable
1: enable
Bit 1
INTE: external interrupt enable
0: disable
1: enable
Bit 0
EMI: Master interrupt global enable
0: disable
1: enable
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¨
INTC1 Register
Bit
7
6
5
Name
R/W
POR
4
¾
TBF
ADF
T2F
¾
R/W
R/W
R/W
¾
0
0
0
¾
Bit 7,3
unimplemented, read as ²0²
Bit 6
TBF: Time Base event interrupt request flag
0: inactive
1: active
Bit 5
ADF: A/D Conversion interrupt request flag
0: inactive
1: active
Bit 4
T2F: Timer/Event Counter 2 interrupt request flag
0: inactive
1: active
Bit 2
TBE: Time base event interrupt enable
0: disable
1: enable
Bit 1
ADE: A/D Conversion interrupt enable
0: disable
1: enable
Bit 0
T2E: Timer/Event Counter 2 interrupt enable
0: disable
1: enable
Rev. 1.10
63
3
2
1
0
¾
TBE
ADE
T2E
¾
R/W
R/W
R/W
0
0
0
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HT46R064/065/066/0662/067
Timer/Event Counter Interrupt
SCOM Function for LCD
For a Timer/Event Counter interrupt to occur, the global
interrupt enable bit, EMI, and the corresponding timer
interrupt enable bit, TnE, must first be set. An actual
Timer/Event Counter interrupt will take place when the
Timer/Event Counter request flag, TnF, is set, a situation
that will occur when the relevant Timer/Event Counter
overflows. When the interrupt is enabled, the stack is
not full and a Timer/Event Counter n overflow occurs, a
subroutine call to the relevant timer interrupt vector, will
take place. When the interrupt is serviced, the timer interrupt request flag, TnF, will be automatically reset and
the EMI bit will be automatically cleared to disable other
interrupts.
The devices have the capability of driving external LCD
panels. The common pins for LCD driving, SCOM0~
SCOM3, are pin shared with certain pin on the PB0~
PB3 port. The LCD signals (COM and SEG) are generated using the application program.
LCD Operation
An external LCD panel can be driven using this device
by configuring the PB0~PB3 pins as common pins and
using other output ports lines as segment pins. The LCD
driver function is controlled using the SCOMC register
which in addition to controlling the overall on/off function
also controls the bias voltage setup function. This enables the LCD COM driver to generate the necessary
VDD/2 voltage levels for LCD 1/2 bias operation.
Time Base Interrupt
For a time base interrupt to occur the global interrupt enable bit EMI and the corresponding interrupt enable bit
TBE, must first be set. An actual Time Base interrupt will
take place when the time base request flag TBF is set, a
situation that will occur when the Time Base overflows.
When the interrupt is enabled, the stack is not full and a
time base overflow occurs a subroutine call to time base
vector will take place. When the interrupt is serviced, the
time base interrupt flag. TBF will be automatically reset
and the EMI bit will be automatically cleared to disable
other interrupts.
The SCOMEN bit in the SCOMC register is the overall
master control for the LCD Driver, however this bit is
used in conjunction with the COMnEN bits to select
which Port B pins are used for LCD driving. Note that the
Port Control register does not need to first setup the pins
as outputs to enable the LCD driver operation.
V
D D
S C O M
V
D D
o p e r a tin g c u r r e n t
/2
S C O M 0 ~
S C O M 3
Programming Considerations
C O M n E N
S C O M E N
By disabling the interrupt enable bits, a requested interrupt can be prevented from being serviced, however,
once an interrupt request flag is set, it will remain in this
condition in the interrupt register until the corresponding
interrupt is serviced or until the request flag is cleared by
a software instruction.
LCD COM Bias
It is recommended that programs do not use the ²CALL
subroutine² instruction within the interrupt subroutine.
Interrupts often occur in an unpredictable manner or
need to be serviced immediately in some applications. If
only one stack is left and the interrupt is not well controlled, the original control sequence will be damaged
once a ²CALL subroutine² is executed in the interrupt
subroutine.
SCOMEN
COMnEN
Pin Function
O/P Level
0
X
I/O
0 or 1
1
0
I/O
0 or 1
1
1
SCOMN
VDD/2
Output Control
All of these interrupts have the capability of waking up
the processor when in the Idle/Sleep Mode.
Only the Program Counter is pushed onto the stack. If
the contents of the register or status register are altered
by the interrupt service program, which may corrupt the
desired control sequence, then the contents should be
saved in advance.
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LCD Bias Control
The LCD COM driver enables a range of selections to be provided to suit the requirement of the LCD panel which is being used. The bias resistor choice is implemented using the ISEL1 and ISEL0 bits in the SCOMC register.
· SCOMC Register
Bit
7
6
5
4
3
2
1
0
Name
¾
ISEL1
ISEL0
SCOMEN
COM3EN
COM2EN
COM1EN
COM0EN
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
0
0
0
0
0
0
0
Bit 7
Reserved Bit
1: Unpredictable operation - bit must NOT be set high
0: Correct level - bit must be reset to zero for correct operation
Bit 6,5
ISEL1, ISEL0: SCOM operating current selection (VDD=5V)
00: 25mA
01: 50mA
10: 100mA
11: 200mA
Bit 4
SCOMEN: SCOM module on/off control
0: disable
1: enable
SCOMn can be enable by COMnEN if SCOMEN=1
Bit 3
COM3EN: PB3 or SCOM3 selection
0: GPIO
1: SCOM3
Bit 2
COM2EN: PB2 or SCOM2 selection
0: GPIO
1: SCOM2
Bit 1
COM1EN: PB1 or SCOM1 selection
0: GPIO
1: SCOM1
Bit 0
COM0EN: PB0 or SCOM0 selection
0: GPIO
1: SCOM0
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Configuration Options
Configuration options refer to certain options within the MCU that are programmed into the OTP Program Memory device during the programming process. During the development process, these options are selected using the HT-IDE
software development tools. As these options are programmed into the device using the hardware programming tools,
once they are selected they cannot be changed later by the application software. All options must be defined for proper
system function, the details of which are shown in the table.
No.
Options
1
Watchdog Timer: enable or disable
2
Watchdog Timer clock source: LXT, LIRC or fSYS/4
Note: LXT oscillator must be selected by OSC configuration option if WDT clock source is from LXT.
3
CLRWDT instructions: 1 or 2 instructions
4
(1)For HT46R064/HT46R065/HT46R066
System oscillator configuration: HXT, HIRC, ERC, HIRC + LXT
(2)For HT46R0662/HT46R067
System oscillator configuration: HXT, HIRC, ERC, HXT + LXT, HIRC + LXT, ERC + LXT
5
LVR function: enable or disable
6
LVR voltage: 2.1V, 3.15V or 4.2V
7
RES or PA7 pin function
8
SST: 1024 or 2 clocks (determine tSST for HIRC/ERC)
9
Internal RC: 4MHz, 8MHz or 12MHz
Application Circuits
V
D D
0 .0 1 m F
0 .1 m F
V D D
R e s e t
C ir c u it
1 0 k W ~
1 0 0 k W
1 N 4 1 4 8
0 .1 ~ 1 m F
R E S /P A 7
3 0 0 W
V S S
O S C 1
O S C
C ir c u it
O S C 2
S e e O s c illa to r
S e c tio n
O S C
C ir c u it
P A 0
P A 1 /P F D
P A 2 /T C 0
P A 3 /IN T
P A 4 /T C 1 /P
/A N
/A N
/A N
/A N
W M
0
3
1
2
0
P B 0 ~ P B 7
P C 2
P C 3
P
P
P
P
/P W
/P W
C 0 /A
C 1 /A
C 6 /A
C 7 /A
M 1
M 2
N 4
N 5
N 6
N 7
P D 0 ~ P D 7
X T 1
P E 0 ~ P E 1
X T 2
P F 0 ~ P F 1
S e e O s c illa to r
S e c tio n
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Instruction Set
subtract instruction mnemonics to enable the necessary
arithmetic to be carried out. Care must be taken to ensure correct handling of carry and borrow data when results exceed 255 for addition and less than 0 for
subtraction. The increment and decrement instructions
INC, INCA, DEC and DECA provide a simple means of
increasing or decreasing by a value of one of the values
in the destination specified.
Introduction
C e n t ra l t o t he s uc c es s f ul oper a t i on o f a n y
microcontroller is its instruction set, which is a set of program instruction codes that directs the microcontroller to
perform certain operations. In the case of Holtek
microcontrollers, a comprehensive and flexible set of
over 60 instructions is provided to enable programmers
to implement their application with the minimum of programming overheads.
Logical and Rotate Operations
For easier understanding of the various instruction
codes, they have been subdivided into several functional groupings.
The standard logical operations such as AND, OR, XOR
and CPL all have their own instruction within the Holtek
microcontroller instruction set. As with the case of most
instructions involving data manipulation, data must pass
through the Accumulator which may involve additional
programming steps. In all logical data operations, the
zero flag may be set if the result of the operation is zero.
Another form of logical data manipulation comes from
the rotate instructions such as RR, RL, RRC and RLC
which provide a simple means of rotating one bit right or
left. Different rotate instructions exist depending on program requirements. Rotate instructions are useful for
serial port programming applications where data can be
rotated from an internal register into the Carry bit from
where it can be examined and the necessary serial bit
set high or low. Another application where rotate data
operations are used is to implement multiplication and
division calculations.
Instruction Timing
Most instructions are implemented within one instruction cycle. The exceptions to this are branch, call, or table read instructions where two instruction cycles are
required. One instruction cycle is equal to 4 system
clock cycles, therefore in the case of an 8MHz system
oscillator, most instructions would be implemented
within 0.5ms and branch or call instructions would be implemented within 1ms. Although instructions which require one more cycle to implement are generally limited
to the JMP, CALL, RET, RETI and table read instructions, it is important to realize that any other instructions
which involve manipulation of the Program Counter Low
register or PCL will also take one more cycle to implement. As instructions which change the contents of the
PCL will imply a direct jump to that new address, one
more cycle will be required. Examples of such instructions would be ²CLR PCL² or ²MOV PCL, A². For the
case of skip instructions, it must be noted that if the result of the comparison involves a skip operation then
this will also take one more cycle, if no skip is involved
then only one cycle is required.
Branches and Control Transfer
Program branching takes the form of either jumps to
specified locations using the JMP instruction or to a subroutine using the CALL instruction. They differ in the
sense that in the case of a subroutine call, the program
must return to the instruction immediately when the subroutine has been carried out. This is done by placing a
return instruction RET in the subroutine which will cause
the program to jump back to the address right after the
CALL instruction. In the case of a JMP instruction, the
program simply jumps to the desired location. There is
no requirement to jump back to the original jumping off
point as in the case of the CALL instruction. One special
and extremely useful set of branch instructions are the
conditional branches. Here a decision is first made regarding the condition of a certain data memory or individual bits. Depending upon the conditions, the program
will continue with the next instruction or skip over it and
jump to the following instruction. These instructions are
the key to decision making and branching within the program perhaps determined by the condition of certain input switches or by the condition of internal data bits.
Moving and Transferring Data
The transfer of data within the microcontroller program
is one of the most frequently used operations. Making
use of three kinds of MOV instructions, data can be
transferred from registers to the Accumulator and
vice-versa as well as being able to move specific immediate data directly into the Accumulator. One of the most
important data transfer applications is to receive data
from the input ports and transfer data to the output ports.
Arithmetic Operations
The ability to perform certain arithmetic operations and
data manipulation is a necessary feature of most
microcontroller applications. Within the Holtek
microcontroller instruction set are a range of add and
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Bit Operations
Other Operations
The ability to provide single bit operations on Data Memory is an extremely flexible feature of all Holtek
microcontrollers. This feature is especially useful for
output port bit programming where individual bits or port
pins can be directly set high or low using either the ²SET
[m].i² or ²CLR [m].i² instructions respectively. The feature removes the need for programmers to first read the
8-bit output port, manipulate the input data to ensure
that other bits are not changed and then output the port
with the correct new data. This read-modify-write process is taken care of automatically when these bit operation instructions are used.
In addition to the above functional instructions, a range
of other instructions also exist such as the ²HALT² instruction for Power-down operations and instructions to
control the operation of the Watchdog Timer for reliable
program operations under extreme electric or electromagnetic environments. For their relevant operations,
refer to the functional related sections.
Instruction Set Summary
The following table depicts a summary of the instruction
set categorised according to function and can be consulted as a basic instruction reference using the following listed conventions.
Table Read Operations
Table conventions:
Data storage is normally implemented by using registers. However, when working with large amounts of
fixed data, the volume involved often makes it inconvenient to store the fixed data in the Data Memory. To overcome this problem, Holtek microcontrollers allow an
area of Program Memory to be setup as a table where
data can be directly stored. A set of easy to use instructions provides the means by which this fixed data can be
referenced and retrieved from the Program Memory.
Mnemonic
x: Bits immediate data
m: Data Memory address
A: Accumulator
i: 0~7 number of bits
addr: Program memory address
Description
Cycles
Flag Affected
1
1Note
1
1
1Note
1
1
1Note
1
1Note
1Note
Z, C, AC, OV
Z, C, AC, OV
Z, C, AC, OV
Z, C, AC, OV
Z, C, AC, OV
Z, C, AC, OV
Z, C, AC, OV
Z, C, AC, OV
Z, C, AC, OV
Z, C, AC, OV
C
1
1
1
1Note
1Note
1Note
1
1
1
1Note
1
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
1
1Note
1
1Note
Z
Z
Z
Z
Arithmetic
ADD A,[m]
ADDM A,[m]
ADD A,x
ADC A,[m]
ADCM A,[m]
SUB A,x
SUB A,[m]
SUBM A,[m]
SBC A,[m]
SBCM A,[m]
DAA [m]
Add Data Memory to ACC
Add ACC to Data Memory
Add immediate data to ACC
Add Data Memory to ACC with Carry
Add ACC to Data memory with Carry
Subtract immediate data from the ACC
Subtract Data Memory from ACC
Subtract Data Memory from ACC with result in Data Memory
Subtract Data Memory from ACC with Carry
Subtract Data Memory from ACC with Carry, result in Data Memory
Decimal adjust ACC for Addition with result in Data Memory
Logic Operation
AND A,[m]
OR A,[m]
XOR A,[m]
ANDM A,[m]
ORM A,[m]
XORM A,[m]
AND A,x
OR A,x
XOR A,x
CPL [m]
CPLA [m]
Logical AND Data Memory to ACC
Logical OR Data Memory to ACC
Logical XOR Data Memory to ACC
Logical AND ACC to Data Memory
Logical OR ACC to Data Memory
Logical XOR ACC to Data Memory
Logical AND immediate Data to ACC
Logical OR immediate Data to ACC
Logical XOR immediate Data to ACC
Complement Data Memory
Complement Data Memory with result in ACC
Increment & Decrement
INCA [m]
INC [m]
DECA [m]
DEC [m]
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Increment Data Memory with result in ACC
Increment Data Memory
Decrement Data Memory with result in ACC
Decrement Data Memory
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Mnemonic
Description
Cycles
Flag Affected
Rotate Data Memory right with result in ACC
Rotate Data Memory right
Rotate Data Memory right through Carry with result in ACC
Rotate Data Memory right through Carry
Rotate Data Memory left with result in ACC
Rotate Data Memory left
Rotate Data Memory left through Carry with result in ACC
Rotate Data Memory left through Carry
1
1Note
1
1Note
1
1Note
1
1Note
None
None
C
C
None
None
C
C
Move Data Memory to ACC
Move ACC to Data Memory
Move immediate data to ACC
1
1Note
1
None
None
None
Clear bit of Data Memory
Set bit of Data Memory
1Note
1Note
None
None
Jump unconditionally
Skip if Data Memory is zero
Skip if Data Memory is zero with data movement to ACC
Skip if bit i of Data Memory is zero
Skip if bit i of Data Memory is not zero
Skip if increment Data Memory is zero
Skip if decrement Data Memory is zero
Skip if increment Data Memory is zero with result in ACC
Skip if decrement Data Memory is zero with result in ACC
Subroutine call
Return from subroutine
Return from subroutine and load immediate data to ACC
Return from interrupt
2
1Note
1note
1Note
1Note
1Note
1Note
1Note
1Note
2
2
2
2
None
None
None
None
None
None
None
None
None
None
None
None
None
Read table (current page) to TBLH and Data Memory
Read table (last page) to TBLH and Data Memory
2Note
2Note
None
None
No operation
Clear Data Memory
Set Data Memory
Clear Watchdog Timer
Pre-clear Watchdog Timer
Pre-clear Watchdog Timer
Swap nibbles of Data Memory
Swap nibbles of Data Memory with result in ACC
Enter power down mode
1
1Note
1Note
1
1
1
1Note
1
1
None
None
None
TO, PDF
TO, PDF
TO, PDF
None
None
TO, PDF
Rotate
RRA [m]
RR [m]
RRCA [m]
RRC [m]
RLA [m]
RL [m]
RLCA [m]
RLC [m]
Data Move
MOV A,[m]
MOV [m],A
MOV A,x
Bit Operation
CLR [m].i
SET [m].i
Branch
JMP addr
SZ [m]
SZA [m]
SZ [m].i
SNZ [m].i
SIZ [m]
SDZ [m]
SIZA [m]
SDZA [m]
CALL addr
RET
RET A,x
RETI
Table Read
TABRDC [m]
TABRDL [m]
Miscellaneous
NOP
CLR [m]
SET [m]
CLR WDT
CLR WDT1
CLR WDT2
SWAP [m]
SWAPA [m]
HALT
Note:
1. For skip instructions, if the result of the comparison involves a skip then two cycles are required,
if no skip takes place only one cycle is required.
2. Any instruction which changes the contents of the PCL will also require 2 cycles for execution.
3. For the ²CLR WDT1² and ²CLR WDT2² instructions the TO and PDF flags may be affected by
the execution status. The TO and PDF flags are cleared after both ²CLR WDT1² and
²CLR WDT2² instructions are consecutively executed. Otherwise the TO and PDF flags
remain unchanged.
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Instruction Definition
ADC A,[m]
Add Data Memory to ACC with Carry
Description
The contents of the specified Data Memory, Accumulator and the carry flag are added. The
result is stored in the Accumulator.
Operation
ACC ¬ ACC + [m] + C
Affected flag(s)
OV, Z, AC, C
ADCM A,[m]
Add ACC to Data Memory with Carry
Description
The contents of the specified Data Memory, Accumulator and the carry flag are added. The
result is stored in the specified Data Memory.
Operation
[m] ¬ ACC + [m] + C
Affected flag(s)
OV, Z, AC, C
ADD A,[m]
Add Data Memory to ACC
Description
The contents of the specified Data Memory and the Accumulator are added. The result is
stored in the Accumulator.
Operation
ACC ¬ ACC + [m]
Affected flag(s)
OV, Z, AC, C
ADD A,x
Add immediate data to ACC
Description
The contents of the Accumulator and the specified immediate data are added. The result is
stored in the Accumulator.
Operation
ACC ¬ ACC + x
Affected flag(s)
OV, Z, AC, C
ADDM A,[m]
Add ACC to Data Memory
Description
The contents of the specified Data Memory and the Accumulator are added. The result is
stored in the specified Data Memory.
Operation
[m] ¬ ACC + [m]
Affected flag(s)
OV, Z, AC, C
AND A,[m]
Logical AND Data Memory to ACC
Description
Data in the Accumulator and the specified Data Memory perform a bitwise logical AND operation. The result is stored in the Accumulator.
Operation
ACC ¬ ACC ²AND² [m]
Affected flag(s)
Z
AND A,x
Logical AND immediate data to ACC
Description
Data in the Accumulator and the specified immediate data perform a bitwise logical AND
operation. The result is stored in the Accumulator.
Operation
ACC ¬ ACC ²AND² x
Affected flag(s)
Z
ANDM A,[m]
Logical AND ACC to Data Memory
Description
Data in the specified Data Memory and the Accumulator perform a bitwise logical AND operation. The result is stored in the Data Memory.
Operation
[m] ¬ ACC ²AND² [m]
Affected flag(s)
Z
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CALL addr
Subroutine call
Description
Unconditionally calls a subroutine at the specified address. The Program Counter then increments by 1 to obtain the address of the next instruction which is then pushed onto the
stack. The specified address is then loaded and the program continues execution from this
new address. As this instruction requires an additional operation, it is a two cycle instruction.
Operation
Stack ¬ Program Counter + 1
Program Counter ¬ addr
Affected flag(s)
None
CLR [m]
Clear Data Memory
Description
Each bit of the specified Data Memory is cleared to 0.
Operation
[m] ¬ 00H
Affected flag(s)
None
CLR [m].i
Clear bit of Data Memory
Description
Bit i of the specified Data Memory is cleared to 0.
Operation
[m].i ¬ 0
Affected flag(s)
None
CLR WDT
Clear Watchdog Timer
Description
The TO, PDF flags and the WDT are all cleared.
Operation
WDT cleared
TO ¬ 0
PDF ¬ 0
Affected flag(s)
TO, PDF
CLR WDT1
Pre-clear Watchdog Timer
Description
The TO, PDF flags and the WDT are all cleared. Note that this instruction works in conjunction with CLR WDT2 and must be executed alternately with CLR WDT2 to have effect. Repetitively executing this instruction without alternately executing CLR WDT2 will have no
effect.
Operation
WDT cleared
TO ¬ 0
PDF ¬ 0
Affected flag(s)
TO, PDF
CLR WDT2
Pre-clear Watchdog Timer
Description
The TO, PDF flags and the WDT are all cleared. Note that this instruction works in conjunction with CLR WDT1 and must be executed alternately with CLR WDT1 to have effect. Repetitively executing this instruction without alternately executing CLR WDT1 will have no
effect.
Operation
WDT cleared
TO ¬ 0
PDF ¬ 0
Affected flag(s)
TO, PDF
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CPL [m]
Complement Data Memory
Description
Each bit of the specified Data Memory is logically complemented (1¢s complement). Bits
which previously contained a 1 are changed to 0 and vice versa.
Operation
[m] ¬ [m]
Affected flag(s)
Z
CPLA [m]
Complement Data Memory with result in ACC
Description
Each bit of the specified Data Memory is logically complemented (1¢s complement). Bits
which previously contained a 1 are changed to 0 and vice versa. The complemented result
is stored in the Accumulator and the contents of the Data Memory remain unchanged.
Operation
ACC ¬ [m]
Affected flag(s)
Z
DAA [m]
Decimal-Adjust ACC for addition with result in Data Memory
Description
Convert the contents of the Accumulator value to a BCD ( Binary Coded Decimal) value resulting from the previous addition of two BCD variables. If the low nibble is greater than 9 or
if AC flag is set, then a value of 6 will be added to the low nibble. Otherwise the low nibble
remains unchanged. If the high nibble is greater than 9 or if the C flag is set, then a value of
6 will be added to the high nibble. Essentially, the decimal conversion is performed by adding 00H, 06H, 60H or 66H depending on the Accumulator and flag conditions. Only the C
flag may be affected by this instruction which indicates that if the original BCD sum is
greater than 100, it allows multiple precision decimal addition.
Operation
[m] ¬ ACC + 00H or
[m] ¬ ACC + 06H or
[m] ¬ ACC + 60H or
[m] ¬ ACC + 66H
Affected flag(s)
C
DEC [m]
Decrement Data Memory
Description
Data in the specified Data Memory is decremented by 1.
Operation
[m] ¬ [m] - 1
Affected flag(s)
Z
DECA [m]
Decrement Data Memory with result in ACC
Description
Data in the specified Data Memory is decremented by 1. The result is stored in the Accumulator. The contents of the Data Memory remain unchanged.
Operation
ACC ¬ [m] - 1
Affected flag(s)
Z
HALT
Enter power down mode
Description
This instruction stops the program execution and turns off the system clock. The contents
of the Data Memory and registers are retained. The WDT and prescaler are cleared. The
power down flag PDF is set and the WDT time-out flag TO is cleared.
Operation
TO ¬ 0
PDF ¬ 1
Affected flag(s)
TO, PDF
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INC [m]
Increment Data Memory
Description
Data in the specified Data Memory is incremented by 1.
Operation
[m] ¬ [m] + 1
Affected flag(s)
Z
INCA [m]
Increment Data Memory with result in ACC
Description
Data in the specified Data Memory is incremented by 1. The result is stored in the Accumulator. The contents of the Data Memory remain unchanged.
Operation
ACC ¬ [m] + 1
Affected flag(s)
Z
JMP addr
Jump unconditionally
Description
The contents of the Program Counter are replaced with the specified address. Program
execution then continues from this new address. As this requires the insertion of a dummy
instruction while the new address is loaded, it is a two cycle instruction.
Operation
Program Counter ¬ addr
Affected flag(s)
None
MOV A,[m]
Move Data Memory to ACC
Description
The contents of the specified Data Memory are copied to the Accumulator.
Operation
ACC ¬ [m]
Affected flag(s)
None
MOV A,x
Move immediate data to ACC
Description
The immediate data specified is loaded into the Accumulator.
Operation
ACC ¬ x
Affected flag(s)
None
MOV [m],A
Move ACC to Data Memory
Description
The contents of the Accumulator are copied to the specified Data Memory.
Operation
[m] ¬ ACC
Affected flag(s)
None
NOP
No operation
Description
No operation is performed. Execution continues with the next instruction.
Operation
No operation
Affected flag(s)
None
OR A,[m]
Logical OR Data Memory to ACC
Description
Data in the Accumulator and the specified Data Memory perform a bitwise logical OR operation. The result is stored in the Accumulator.
Operation
ACC ¬ ACC ²OR² [m]
Affected flag(s)
Z
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OR A,x
Logical OR immediate data to ACC
Description
Data in the Accumulator and the specified immediate data perform a bitwise logical OR operation. The result is stored in the Accumulator.
Operation
ACC ¬ ACC ²OR² x
Affected flag(s)
Z
ORM A,[m]
Logical OR ACC to Data Memory
Description
Data in the specified Data Memory and the Accumulator perform a bitwise logical OR operation. The result is stored in the Data Memory.
Operation
[m] ¬ ACC ²OR² [m]
Affected flag(s)
Z
RET
Return from subroutine
Description
The Program Counter is restored from the stack. Program execution continues at the restored address.
Operation
Program Counter ¬ Stack
Affected flag(s)
None
RET A,x
Return from subroutine and load immediate data to ACC
Description
The Program Counter is restored from the stack and the Accumulator loaded with the
specified immediate data. Program execution continues at the restored address.
Operation
Program Counter ¬ Stack
ACC ¬ x
Affected flag(s)
None
RETI
Return from interrupt
Description
The Program Counter is restored from the stack and the interrupts are re-enabled by setting the EMI bit. EMI is the master interrupt global enable bit. If an interrupt was pending
when the RETI instruction is executed, the pending Interrupt routine will be processed before returning to the main program.
Operation
Program Counter ¬ Stack
EMI ¬ 1
Affected flag(s)
None
RL [m]
Rotate Data Memory left
Description
The contents of the specified Data Memory are rotated left by 1 bit with bit 7 rotated into bit
0.
Operation
[m].(i+1) ¬ [m].i; (i = 0~6)
[m].0 ¬ [m].7
Affected flag(s)
None
RLA [m]
Rotate Data Memory left with result in ACC
Description
The contents of the specified Data Memory are rotated left by 1 bit with bit 7 rotated into bit
0. The rotated result is stored in the Accumulator and the contents of the Data Memory remain unchanged.
Operation
ACC.(i+1) ¬ [m].i; (i = 0~6)
ACC.0 ¬ [m].7
Affected flag(s)
None
Rev. 1.10
74
June 9, 2009
HT46R064/065/066/0662/067
RLC [m]
Rotate Data Memory left through Carry
Description
The contents of the specified Data Memory and the carry flag are rotated left by 1 bit. Bit 7
replaces the Carry bit and the original carry flag is rotated into bit 0.
Operation
[m].(i+1) ¬ [m].i; (i = 0~6)
[m].0 ¬ C
C ¬ [m].7
Affected flag(s)
C
RLCA [m]
Rotate Data Memory left through Carry with result in ACC
Description
Data in the specified Data Memory and the carry flag are rotated left by 1 bit. Bit 7 replaces
the Carry bit and the original carry flag is rotated into the bit 0. The rotated result is stored in
the Accumulator and the contents of the Data Memory remain unchanged.
Operation
ACC.(i+1) ¬ [m].i; (i = 0~6)
ACC.0 ¬ C
C ¬ [m].7
Affected flag(s)
C
RR [m]
Rotate Data Memory right
Description
The contents of the specified Data Memory are rotated right by 1 bit with bit 0 rotated into
bit 7.
Operation
[m].i ¬ [m].(i+1); (i = 0~6)
[m].7 ¬ [m].0
Affected flag(s)
None
RRA [m]
Rotate Data Memory right with result in ACC
Description
Data in the specified Data Memory and the carry flag are rotated right by 1 bit with bit 0 rotated into bit 7. The rotated result is stored in the Accumulator and the contents of the Data
Memory remain unchanged.
Operation
ACC.i ¬ [m].(i+1); (i = 0~6)
ACC.7 ¬ [m].0
Affected flag(s)
None
RRC [m]
Rotate Data Memory right through Carry
Description
The contents of the specified Data Memory and the carry flag are rotated right by 1 bit. Bit 0
replaces the Carry bit and the original carry flag is rotated into bit 7.
Operation
[m].i ¬ [m].(i+1); (i = 0~6)
[m].7 ¬ C
C ¬ [m].0
Affected flag(s)
C
RRCA [m]
Rotate Data Memory right through Carry with result in ACC
Description
Data in the specified Data Memory and the carry flag are rotated right by 1 bit. Bit 0 replaces the Carry bit and the original carry flag is rotated into bit 7. The rotated result is
stored in the Accumulator and the contents of the Data Memory remain unchanged.
Operation
ACC.i ¬ [m].(i+1); (i = 0~6)
ACC.7 ¬ C
C ¬ [m].0
Affected flag(s)
C
Rev. 1.10
75
June 9, 2009
HT46R064/065/066/0662/067
SBC A,[m]
Subtract Data Memory from ACC with Carry
Description
The contents of the specified Data Memory and the complement of the carry flag are subtracted from the Accumulator. The result is stored in the Accumulator. Note that if the result
of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or
zero, the C flag will be set to 1.
Operation
ACC ¬ ACC - [m] - C
Affected flag(s)
OV, Z, AC, C
SBCM A,[m]
Subtract Data Memory from ACC with Carry and result in Data Memory
Description
The contents of the specified Data Memory and the complement of the carry flag are subtracted from the Accumulator. The result is stored in the Data Memory. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is
positive or zero, the C flag will be set to 1.
Operation
[m] ¬ ACC - [m] - C
Affected flag(s)
OV, Z, AC, C
SDZ [m]
Skip if decrement Data Memory is 0
Description
The contents of the specified Data Memory are first decremented by 1. If the result is 0 the
following instruction is skipped. As this requires the insertion of a dummy instruction while
the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program
proceeds with the following instruction.
Operation
[m] ¬ [m] - 1
Skip if [m] = 0
Affected flag(s)
None
SDZA [m]
Skip if decrement Data Memory is zero with result in ACC
Description
The contents of the specified Data Memory are first decremented by 1. If the result is 0, the
following instruction is skipped. The result is stored in the Accumulator but the specified
Data Memory contents remain unchanged. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not
0, the program proceeds with the following instruction.
Operation
ACC ¬ [m] - 1
Skip if ACC = 0
Affected flag(s)
None
SET [m]
Set Data Memory
Description
Each bit of the specified Data Memory is set to 1.
Operation
[m] ¬ FFH
Affected flag(s)
None
SET [m].i
Set bit of Data Memory
Description
Bit i of the specified Data Memory is set to 1.
Operation
[m].i ¬ 1
Affected flag(s)
None
Rev. 1.10
76
June 9, 2009
HT46R064/065/066/0662/067
SIZ [m]
Skip if increment Data Memory is 0
Description
The contents of the specified Data Memory are first incremented by 1. If the result is 0, the
following instruction is skipped. As this requires the insertion of a dummy instruction while
the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program
proceeds with the following instruction.
Operation
[m] ¬ [m] + 1
Skip if [m] = 0
Affected flag(s)
None
SIZA [m]
Skip if increment Data Memory is zero with result in ACC
Description
The contents of the specified Data Memory are first incremented by 1. If the result is 0, the
following instruction is skipped. The result is stored in the Accumulator but the specified
Data Memory contents remain unchanged. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not
0 the program proceeds with the following instruction.
Operation
ACC ¬ [m] + 1
Skip if ACC = 0
Affected flag(s)
None
SNZ [m].i
Skip if bit i of Data Memory is not 0
Description
If bit i of the specified Data Memory is not 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two
cycle instruction. If the result is 0 the program proceeds with the following instruction.
Operation
Skip if [m].i ¹ 0
Affected flag(s)
None
SUB A,[m]
Subtract Data Memory from ACC
Description
The specified Data Memory is subtracted from the contents of the Accumulator. The result
is stored in the Accumulator. Note that if the result of subtraction is negative, the C flag will
be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1.
Operation
ACC ¬ ACC - [m]
Affected flag(s)
OV, Z, AC, C
SUBM A,[m]
Subtract Data Memory from ACC with result in Data Memory
Description
The specified Data Memory is subtracted from the contents of the Accumulator. The result
is stored in the Data Memory. Note that if the result of subtraction is negative, the C flag will
be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1.
Operation
[m] ¬ ACC - [m]
Affected flag(s)
OV, Z, AC, C
SUB A,x
Subtract immediate data from ACC
Description
The immediate data specified by the code is subtracted from the contents of the Accumulator. The result is stored in the Accumulator. Note that if the result of subtraction is negative, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will
be set to 1.
Operation
ACC ¬ ACC - x
Affected flag(s)
OV, Z, AC, C
Rev. 1.10
77
June 9, 2009
HT46R064/065/066/0662/067
SWAP [m]
Swap nibbles of Data Memory
Description
The low-order and high-order nibbles of the specified Data Memory are interchanged.
Operation
[m].3~[m].0 « [m].7 ~ [m].4
Affected flag(s)
None
SWAPA [m]
Swap nibbles of Data Memory with result in ACC
Description
The low-order and high-order nibbles of the specified Data Memory are interchanged. The
result is stored in the Accumulator. The contents of the Data Memory remain unchanged.
Operation
ACC.3 ~ ACC.0 ¬ [m].7 ~ [m].4
ACC.7 ~ ACC.4 ¬ [m].3 ~ [m].0
Affected flag(s)
None
SZ [m]
Skip if Data Memory is 0
Description
If the contents of the specified Data Memory is 0, the following instruction is skipped. As
this requires the insertion of a dummy instruction while the next instruction is fetched, it is a
two cycle instruction. If the result is not 0 the program proceeds with the following instruction.
Operation
Skip if [m] = 0
Affected flag(s)
None
SZA [m]
Skip if Data Memory is 0 with data movement to ACC
Description
The contents of the specified Data Memory are copied to the Accumulator. If the value is
zero, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the
program proceeds with the following instruction.
Operation
ACC ¬ [m]
Skip if [m] = 0
Affected flag(s)
None
SZ [m].i
Skip if bit i of Data Memory is 0
Description
If bit i of the specified Data Memory is 0, the following instruction is skipped. As this requires the insertion of a dummy instruction while the next instruction is fetched, it is a two
cycle instruction. If the result is not 0, the program proceeds with the following instruction.
Operation
Skip if [m].i = 0
Affected flag(s)
None
TABRDC [m]
Read table (current page) to TBLH and Data Memory
Description
The low byte of the program code (current page) addressed by the table pointer (TBLP) is
moved to the specified Data Memory and the high byte moved to TBLH.
Operation
[m] ¬ program code (low byte)
TBLH ¬ program code (high byte)
Affected flag(s)
None
TABRDL [m]
Read table (last page) to TBLH and Data Memory
Description
The low byte of the program code (last page) addressed by the table pointer (TBLP) is
moved to the specified Data Memory and the high byte moved to TBLH.
Operation
[m] ¬ program code (low byte)
TBLH ¬ program code (high byte)
Affected flag(s)
None
Rev. 1.10
78
June 9, 2009
HT46R064/065/066/0662/067
XOR A,[m]
Logical XOR Data Memory to ACC
Description
Data in the Accumulator and the specified Data Memory perform a bitwise logical XOR operation. The result is stored in the Accumulator.
Operation
ACC ¬ ACC ²XOR² [m]
Affected flag(s)
Z
XORM A,[m]
Logical XOR ACC to Data Memory
Description
Data in the specified Data Memory and the Accumulator perform a bitwise logical XOR operation. The result is stored in the Data Memory.
Operation
[m] ¬ ACC ²XOR² [m]
Affected flag(s)
Z
XOR A,x
Logical XOR immediate data to ACC
Description
Data in the Accumulator and the specified immediate data perform a bitwise logical XOR
operation. The result is stored in the Accumulator.
Operation
ACC ¬ ACC ²XOR² x
Affected flag(s)
Z
Rev. 1.10
79
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Package Information
16-pin DIP (300mil) Outline Dimensions
A
B
A
1 6
9
1
8
B
1 6
9
1
8
H
H
C
C
D
D
G
E
G
E
I
F
I
F
Fig1. Full Lead Packages
Fig2. 1/2 Lead Packages
· MS-001d (see fig1)
Symbol
A
Dimensions in mil
Min.
Nom.
Max.
780
¾
880
B
240
¾
280
C
115
¾
195
D
115
¾
150
E
14
¾
22
F
45
¾
70
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
· MS-001d (see fig2)
Symbol
A
Rev. 1.10
Dimensions in mil
Min.
Nom.
Max.
735
¾
775
B
240
¾
280
C
115
¾
195
D
115
¾
150
E
14
¾
22
70
F
45
¾
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
80
June 9, 2009
HT46R064/065/066/0662/067
· MO-095a (see fig2)
Symbol
A
Rev. 1.10
Dimensions in mil
Min.
Nom.
Max.
745
¾
785
B
275
¾
295
C
120
¾
150
D
110
¾
150
E
14
¾
22
F
45
¾
60
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
81
June 9, 2009
HT46R064/065/066/0662/067
16-pin NSOP (150mil) Outline Dimensions
1 6
A
9
B
8
1
C
C '
G
H
D
E
Symbol
Rev. 1.10
a
F
Dimensions in mil
Min.
Nom.
Max.
A
228
¾
244
B
149
¾
157
C
14
¾
20
C¢
386
¾
394
D
53
¾
69
E
¾
50
¾
F
4
¾
10
G
22
¾
28
H
4
¾
12
a
0°
¾
10°
82
June 9, 2009
HT46R064/065/066/0662/067
20-pin DIP (300mil) Outline Dimensions
A
B
A
2 0
1 1
1
1 0
B
2 0
1 1
1 0
1
H
H
C
C
D
D
E
F
I
G
E
F
Fig1. Full Lead Packages
I
G
Fig2. 1/2 Lead Packages
· MS-001d (see fig1)
Symbol
Dimensions in mil
Min.
Nom.
Max.
A
980
¾
1060
B
240
¾
280
C
115
¾
195
D
115
¾
150
E
14
¾
22
F
45
¾
70
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
· MO-095a (see fig2)
Symbol
Rev. 1.10
Dimensions in mil
Min.
Nom.
Max.
A
945
¾
985
B
275
¾
295
C
120
¾
150
D
110
¾
150
E
14
¾
22
F
45
¾
60
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
83
June 9, 2009
HT46R064/065/066/0662/067
20-pin SOP (300mil) Outline Dimensions
1 1
2 0
A
B
1
1 0
C
C '
G
H
D
E
a
F
· MS-013
Symbol
Rev. 1.10
Dimensions in mil
Min.
Nom.
Max.
A
393
¾
419
B
256
¾
300
C
12
¾
20
C¢
496
¾
512
D
¾
¾
104
E
¾
50
¾
F
4
¾
12
G
16
¾
50
H
8
¾
13
a
0°
¾
8°
84
June 9, 2009
HT46R064/065/066/0662/067
20-pin SSOP (150mil) Outline Dimensions
1 1
2 0
A
B
1
1 0
C
C '
G
H
D
E
Symbol
Rev. 1.10
a
F
Dimensions in mil
Min.
Nom.
Max.
A
228
¾
244
B
150
¾
158
C
8
¾
12
C¢
335
¾
347
D
49
¾
65
E
¾
25
¾
F
4
¾
10
G
15
¾
50
H
7
¾
10
a
0°
¾
8°
85
June 9, 2009
HT46R064/065/066/0662/067
24-pin SKDIP (300mil) Outline Dimensions
A
A
1 3
2 4
B
1 3
2 4
B
1 2
1
1 2
1
H
H
C
C
D
D
E
F
I
G
E
F
I
G
Fig2. 1/2 Lead Packages
Fig1. Full Lead Packages
· MS-001d (see fig1)
Symbol
Dimensions in mil
Min.
Nom.
Max.
A
1230
¾
1280
B
240
¾
280
C
115
¾
195
D
115
¾
150
E
14
¾
22
F
45
¾
70
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
· MS-001d (see fig2)
Symbol
Rev. 1.10
Dimensions in mil
Min.
Nom.
Max.
A
1160
¾
1195
B
240
¾
280
C
115
¾
195
D
115
¾
150
E
14
¾
22
F
45
¾
70
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
86
June 9, 2009
HT46R064/065/066/0662/067
· MO-095a (see fig2)
Symbol
A
Rev. 1.10
Dimensions in mil
Min.
Nom.
Max.
1145
¾
1185
B
275
¾
295
C
120
¾
150
D
110
¾
150
E
14
¾
22
F
45
¾
60
G
¾
100
¾
H
300
¾
325
I
¾
¾
430
87
June 9, 2009
HT46R064/065/066/0662/067
24-pin SOP (300mil) Outline Dimensions
1 3
2 4
A
B
1 2
1
C
C '
G
H
D
E
a
F
· MS-013
Symbol
Rev. 1.10
Dimensions in mil
Min.
Nom.
Max.
A
393
¾
419
B
256
¾
300
C
12
¾
20
C¢
598
¾
613
D
¾
¾
104
E
¾
50
¾
F
4
¾
12
G
16
¾
50
H
8
¾
13
a
0°
¾
8°
88
June 9, 2009
HT46R064/065/066/0662/067
24-pin SSOP (150mil) Outline Dimensions
1 3
2 4
A
B
1 2
1
C
C '
G
H
D
E
Symbol
Rev. 1.10
a
F
Dimensions in mil
Min.
Nom.
Max.
A
228
¾
244
B
150
¾
157
C
8
¾
12
C¢
335
¾
346
D
54
¾
60
E
¾
25
¾
F
4
¾
10
G
22
¾
28
H
7
¾
10
a
0°
¾
8°
89
June 9, 2009
HT46R064/065/066/0662/067
28-pin SKDIP (300mil) Outline Dimensions
A
B
2 8
1 5
1
1 4
H
C
D
E
Symbol
A
Rev. 1.10
F
I
G
Dimensions in mil
Min.
Nom.
Max.
1375
¾
1395
B
278
¾
298
C
125
¾
135
D
125
¾
145
E
16
¾
20
F
50
¾
70
G
¾
100
¾
H
295
¾
315
I
¾
¾
375
90
June 9, 2009
HT46R064/065/066/0662/067
28-pin SOP (300mil) Outline Dimensions
2 8
1 5
A
B
1
1 4
C
C '
G
H
D
E
a
F
· MS-013
Symbol
Rev. 1.10
Dimensions in mil
Min.
Nom.
Max.
A
393
¾
419
B
256
¾
300
C
12
¾
20
C¢
697
¾
713
D
¾
¾
104
E
¾
50
¾
F
4
¾
12
G
16
¾
50
H
8
¾
13
a
0°
¾
8°
91
June 9, 2009
HT46R064/065/066/0662/067
28-pin SSOP (150mil) Outline Dimensions
1 5
2 8
A
B
1 4
1
C
C '
G
H
D
E
Symbol
Rev. 1.10
a
F
Dimensions in mil
Min.
Nom.
Max.
A
228
¾
244
B
150
¾
157
C
8
¾
12
C¢
386
¾
394
D
54
¾
60
E
¾
25
¾
F
4
¾
10
G
22
¾
28
H
7
¾
10
a
0°
¾
8°
92
June 9, 2009
HT46R064/065/066/0662/067
44-pin QFP (10mm´10mm) Outline Dimensions
H
C
D
G
2 3
3 3
I
3 4
2 2
L
F
A
B
E
1 2
4 4
K
a
J
1
Symbol
A
Rev. 1.10
1 1
Dimensions in mm
Min.
Nom.
Max.
13.00
¾
13.40
B
9.90
¾
10.10
C
13.00
¾
13.40
D
9.90
¾
10.10
E
¾
0.80
¾
F
¾
0.30
¾
G
1.90
¾
2.20
H
¾
¾
2.70
I
0.25
¾
0.50
J
0.73
¾
0.93
K
0.10
¾
0.20
L
¾
0.10
¾
a
0°
¾
7°
93
June 9, 2009
HT46R064/065/066/0662/067
Product Tape and Reel Specifications
Reel Dimensions
D
T 2
A
C
B
T 1
SOP 16N (150mil)
Symbol
Description
A
Reel Outer Diameter
B
Reel Inner Diameter
C
Spindle Hole Diameter
D
Key Slit Width
T1
Space Between Flange
T2
Reel Thickness
Dimensions in mm
330.0±1.0
100.0±1.5
13.0
+0.5/-0.2
2.0±0.5
16.8
+0.3/-0.2
22.2±0.2
SOP 20W, SOP 24W, SOP 28W (300mil)
Symbol
Description
A
Reel Outer Diameter
B
Reel Inner Diameter
C
Spindle Hole Diameter
D
Key Slit Width
T1
Space Between Flange
T2
Reel Thickness
Dimensions in mm
330.0±1.0
100.0±1.5
13.0
+0.5/-0.2
2.0±0.5
24.8
+0.3/-0.2
30.2±0.2
SSOP 20S (150mil), SSOP 24S (150mil), SSOP 28S (150mil)
Symbol
Description
A
Reel Outer Diameter
B
Reel Inner Diameter
C
Spindle Hole Diameter
D
Key Slit Width
T1
Space Between Flange
T2
Reel Thickness
Rev. 1.10
Dimensions in mm
330.0±1.0
100.0±1.5
13.0
+0.5/-0.2
2.0±0.5
16.8
+0.3/-0.2
22.2±0.2
94
June 9, 2009
HT46R064/065/066/0662/067
Carrier Tape Dimensions
P 0
D
P 1
t
E
F
W
B 0
C
D 1
P
K 0
A 0
R e e l H o le
IC p a c k a g e p in 1 a n d th e r e e l h o le s
a r e lo c a te d o n th e s a m e s id e .
SOP 16N (150mil)
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
P
Cavity Pitch
8.0±0.1
E
Perforation Position
1.75±0.1
16.0±0.3
F
Cavity to Perforation (Width Direction)
D
Perforation Diameter
1.55
+0.10/-0.00
D1
Cavity Hole Diameter
1.50
+0.25/-0.00
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
6.5±0.1
B0
Cavity Width
10.3±0.1
K0
Cavity Depth
2.1±0.1
7.5±0.1
t
Carrier Tape Thickness
0.30±0.05
C
Cover Tape Width
13.3±0.1
SOP 20W
Symbol
Description
Dimensions in mm
24.0
+0.3/-0.1
W
Carrier Tape Width
P
Cavity Pitch
12.0±0.1
E
Perforation Position
1.75±0.10
F
Cavity to Perforation (Width Direction)
D
Perforation Diameter
11.5±0.1
1.5
1.50
+0.1/-0.0
+0.25/-0.00
D1
Cavity Hole Diameter
P0
Perforation Pitch
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
10.8±0.1
B0
Cavity Width
13.3±0.1
K0
Cavity Depth
3.2±0.1
4.0±0.1
t
Carrier Tape Thickness
0.30±0.05
C
Cover Tape Width
21.3±0.1
Rev. 1.10
95
June 9, 2009
HT46R064/065/066/0662/067
SOP 24W
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
24.0±0.3
P
Cavity Pitch
12.0±0.1
E
Perforation Position
1.75±0.1
F
Cavity to Perforation (Width Direction)
D
Perforation Diameter
1.55
+0.10/-0.00
D1
Cavity Hole Diameter
1.50
+0.25/-0.00
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
10.9±0.1
B0
Cavity Width
15.9±0.1
K0
Cavity Depth
11.5±0.1
3.1±0.1
t
Carrier Tape Thickness
0.35±0.05
C
Cover Tape Width
21.3±0.1
SOP 28W (300mil)
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
24.0±0.3
P
Cavity Pitch
12.0±0.1
E
Perforation Position
1.75±0.10
F
Cavity to Perforation (Width Direction)
11.5±0.1
D
Perforation Diameter
1.5
D1
Cavity Hole Diameter
1.50
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
10.85±0.10
B0
Cavity Width
18.34±0.10
K0
Cavity Depth
2.97±0.10
t
Carrier Tape Thickness
0.35±0.01
C
Cover Tape Width
21.3±0.1
Rev. 1.10
96
+0.1/-0.0
+0.25/-0.00
June 9, 2009
HT46R064/065/066/0662/067
SSOP 20S (150mil)
Symbol
Description
W
Carrier Tape Width
P
Cavity Pitch
E
Perforation Position
F
Cavity to Perforation (Width Direction)
D
Perforation Diameter
Dimensions in mm
16.0
+0.3/-0.1
8.0±0.1
1.75±0.10
7.5±0.1
1.5
1.50
+0.1/-0.0
+0.25/-0.00
D1
Cavity Hole Diameter
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
6.5±0.1
B0
Cavity Width
9.0±0.1
K0
Cavity Depth
2.3±0.1
t
Carrier Tape Thickness
0.30±0.05
C
Cover Tape Width
13.3±0.1
SSOP 24S (150mil)
Symbol
Description
Dimensions in mm
16.0
+0.3/-0.1
W
Carrier Tape Width
P
Cavity Pitch
E
Perforation Position
F
Cavity to Perforation (Width Direction)
D
Perforation Diameter
1.5
D1
Cavity Hole Diameter
1.50
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
6.5±0.1
B0
Cavity Width
9.5±0.1
K0
Cavity Depth
2.1±0.1
8.0±0.1
1.75±0.10
7.5±0.1
+0.1/-0.0
+0.25/-0.00
t
Carrier Tape Thickness
0.30±0.05
C
Cover Tape Width
13.3±0.1
Rev. 1.10
97
June 9, 2009
HT46R064/065/066/0662/067
SSOP 28S (150mil)
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
16.0±0.3
P
Cavity Pitch
8.0±0.1
E
Perforation Position
1.75±0.1
F
Cavity to Perforation (Width Direction)
D
Perforation Diameter
1.55
+0.10/-0.00
D1
Cavity Hole Diameter
1.50
+0.25/-0.00
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
6.5±0.1
B0
Cavity Width
10.3±0.1
K0
Cavity Depth
2.1±0.1
7.5±0.1
t
Carrier Tape Thickness
0.30±0.05
C
Cover Tape Width
13.3±0.1
Rev. 1.10
98
June 9, 2009
HT46R064/065/066/0662/067
Holtek Semiconductor Inc. (Headquarters)
No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan
Tel: 886-3-563-1999
Fax: 886-3-563-1189
http://www.holtek.com.tw
Holtek Semiconductor Inc. (Taipei Sales Office)
4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan
Tel: 886-2-2655-7070
Fax: 886-2-2655-7373
Fax: 886-2-2655-7383 (International sales hotline)
Holtek Semiconductor Inc. (Shanghai Sales Office)
G Room, 3 Floor, No.1 Building, No.2016 Yi-Shan Road, Minhang District, Shanghai, China 201103
Tel: 86-21-5422-4590
Fax: 86-21-5422-4705
http://www.holtek.com.cn
Holtek Semiconductor Inc. (Shenzhen Sales Office)
5F, Unit A, Productivity Building, No.5 Gaoxin M 2nd Road, Nanshan District, Shenzhen, China 518057
Tel: 86-755-8616-9908, 86-755-8616-9308
Fax: 86-755-8616-9722
Holtek Semiconductor Inc. (Beijing Sales Office)
Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031
Tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752
Fax: 86-10-6641-0125
Holtek Semiconductor (USA), Inc. (North America Sales Office)
46729 Fremont Blvd., Fremont, CA 94538, USA
Tel: 1-510-252-9880
Fax: 1-510-252-9885
http://www.holtek.com
Copyright Ó 2009 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used
solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable
without further modification, nor recommends the use of its products for application that may present a risk to human life
due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices
or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information,
please visit our web site at http://www.holtek.com.tw.
Rev. 1.10
99
June 9, 2009