HOLTEK HT48CA0-3

HT48RA0-3/HT48CA0-3
Remote Type 8-Bit MCU
Technical Document
· Tools Information
· FAQs
· Application Note
- HA0016E Writing and Reading to the HT24 EEPROM with the HT48 MCU Series
- HA0018E Controlling the HT1621 LCD Controller with the HT48 MCU Series
- HA0041E Using the HT48CA0 to Generate the HT6221 Output Signals
- HA0075E MCU Reset and Oscillator Circuits Application Note
- HA0076E HT48RAx/HT48CAx Software Application Note
- HA0082E HT48xA0-1 and HT48xA0-2 Power-on Reset Timing
Features
· Power-down and wake-up features reduce power
· Operating voltage: fSYS=4MHz(±3%) at 2.0V~3.6V,
consumption
Temperature = 0°C ~ +50°C
· 10 bidirectional I/O lines
· 62 powerful instructions
· 6 Schmitt trigger input lines
· Up to 1ms instruction cycle with 4MHz system clock
· All instructions executed in 1 or 2 machine cycles
(PB7 without Pull-high resistor)
· One programmable carrier output - using 9-bit timer
· 14-bit table read instructions
· On-chip RC oscillator - 4MHz ±3% when
· One-level subroutine nesting
· Bit manipulation instructions
VDD=2.0V~3.6V; Temperature = 0°C ~ +50°C
· Watchdog Timer
· Low voltage reset function
· 1K´14 program memory
· 20-pin SOP/SSOP package
· 32´8 data RAM
General Description
The advantages of low power consumption, I/O flexibility, timer functions, watchdog timer, HALT and wake-up
functions, as well as low cost, enhance the versatility of
this device to suit a wide range of application possibilities such as industrial control, consumer products, and
particularly suitable for use in products such as infrared
remote controllers and various subsystem controllers.
The HT48RA0-3/HT48CA0-3 are 8-bit high performance, RISC architecture microcontroller devices specifically designed for multiple I/O control product
applications. The mask version HT48CA0-3 is fully pin
and functionally compatible with the OTP version
HT48RA0-3 device.
Rev.1.10
1
October 12, 2007
HT48RA0-3/HT48CA0-3
Block Diagram
P ro g ra m
In s tr u c tio n
R e g is te r
S T A C K
P ro g ra m
C o u n te r
fS
M
M P
U
D A T A
M e m o ry
X
W D T
C a r r ie r
G e n e ra to r
M U X
R E M
9 - b it T im e r
S T A T U S
A L U
O S C 1
V D D
V S S
/4
F re q u e n c y
D iv id e r
In s tr u c tio n
D e c o d e r
T im in g
G e n e ra to r
Y S
S h ifte r
P O R T B
P B
A C C
P A
P B 0 ~ P B 1
P B 2 ~ P B 7
P O R T A
P A 0 ~ P A 7
Pin Assignment
P A 1
1
2 0
P A 2
P A 0
2
1 9
P A 3
P B 1
3
1 8
P A 4
P B 0
4
1 7
P A 5
R E M
5
1 6
P A 6
V S S
6
1 5
P A 7
P B 6
7
1 4
P B 2
O S C 1
8
1 3
P B 3
V D D
9
1 2
P B 4
P B 7
1 0
1 1
P B 5
H T 4 8 R A 0 -3 /H T 4 8 C A 0 -3
2 0 S O P -A /S S O P -A
Rev.1.10
2
October 12, 2007
HT48RA0-3/HT48CA0-3
Pin Description
Pin Name
I/O
Configuration
Option
Description
PA0~PA7
I/O
¾
Bidirectional 8-bit input/output port with pull-high resistors. Software instructions
determine if the pin is an NMOS output or Schmitt Trigger input.
PB0, PB1
I/O
Wake-up
Bidirectional 2-bit input/output lines with pull-high resistors. Each individual bit
can be configured as a wake-up input by a configuration option. Software instructions determine if the pin is an NMOS output or Schmitt Trigger input.
PB2~PB6
I
Wake-up
5-bit Schmitt Trigger input lines with pull-high resistors. Each individual bit can
be configured as a wake-up input by a configuration option.
PB7
I
Wake-up
1-bit Schmitt trigger input lines without pull-high resistor. This bit can be configured as a wake-up input by a configuration option.
REM
O
¾
Carrier output pin.
OSC1
I
¾
OSC1 is connected to an external resistor for the internal system clock.
VDD
¾
¾
Positive power supply
VSS
¾
¾
Negative power supply, ground
Absolute Maximum Ratings
Supply Voltage ...........................VSS-0.3V to VSS+4.0V
Storage Temperature ............................-50°C to 125°C
Input Voltage..............................VSS-0.3V to VDD+0.3V
IOL Total ..............................................................150mA
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
Ta=25°C
Test Conditions
Symbol
Parameter
VDD
Conditions
¾
Min.
Typ.
Max.
Unit
2.0
¾
3.6
V
VDD
Operating Voltage
¾
IDD
Operating Current
3V
No load, fSYS=4MHz
¾
0.7
1.5
mA
ISTB
Standby Current
3V
No load, system HALT
¾
¾
1
mA
VIL
Input Low Voltage for I/O Ports
3V
¾
0
¾
0.2VDD
V
VIH
Input High Voltage for I/O Ports
3V
¾
0.8VDD
¾
VDD
V
VLVR
Low Voltage Reset Voltage
¾
¾
1.8
1.9
2.0
V
IOL
I/O Ports Sink Current
3V
VOL=0.1VDD
4
8
¾
mA
IOH
REM Output Source Current
3V
VOH=0.9VDD
-5
-7
¾
mA
RPH
Pull-high Resistance
3V
¾
100
150
200
kW
VPOR
VDD Start Voltage to ensure
Power-on Reset
¾
¾
¾
¾
100
mV
RPOR
VDD Rise Rate to ensure
Power-on Reset
¾
¾
0.035
¾
¾
V/ms
Rev.1.10
3
October 12, 2007
HT48RA0-3/HT48CA0-3
A.C. Characteristics
Symbol
Ta=25°C
Test Conditions
Parameter
Conditions
VDD
Min.
Typ.
Max.
Unit
3880
4000
4120
kHz
fSYS
System Clock
3V
fSYS=4MHz(±3%) ,
Temp. = 0°C ~ +50°C
tSST
System Start-up Timer Period
¾
Power-up, reset or wake-up
from HALT
¾
1024
¾
tSYS
tLVR
Low Voltage Width to Reset
¾
¾
0.25
1
2
ms
tPOR
Power-on Reset Low Pulse Width
¾
¾
1
¾
¾
ms
Note: tSYS=1/fSYS
Functional Description
Execution Flow
Program Counter - PC
The HT48RA0-3/HT48CA0-3 system clock is an RC
type clock which requires the connection of an external
resistor for its operation. It is internally divided into four
non-overlapping clocks. One instruction cycle consists
of four system clock cycles.
The 10-bit program counter (PC) controls the sequence
in which the instructions stored in program memory are
executed and its contents specify a maximum of 1024
addresses.
After accessing a program memory word to fetch an instruction code, the contents of the program counter are
incremented by one. The program counter then points to
the memory word containing the next instruction code.
Instruction fetching and execution are pipelined in such
a way that a fetch takes one instruction cycle while decoding and execution takes the next instruction cycle.
However, the pipelining scheme causes each instruction to effectively execute within one cycle. If an instruction changes the program counter, two cycles are
required to complete the instruction.
T 1
S y s te m
T 2
T 3
T 4
When executing a jump instruction, conditional skip execution, loading PCL register, subroutine call, initial reset or return from subroutine, the PC manipulates the
program transfer by loading the address corresponding
to each instruction.
T 1
T 2
T 3
T 4
T 1
T 2
T 3
T 4
C lo c k
In s tr u c tio n C y c le
P C
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 )
Execution Flow
Mode
Program Counter
*9
*8
*7
*6
*5
*4
*3
*2
*1
*0
0
0
0
0
0
0
0
0
0
0
Loading PCL
*9
*8
@7
@6
@5
@4
@3
@2
@1
@0
Jump, call branch
#9
#8
#7
#6
#5
#4
#3
#2
#1
#0
Return from subroutine
S9
S8
S7
S6
S5
S4
S3
S2
S1
S0
Initial reset
Skip
Program Counter + 2
Program Counter
Note:
*9~*0: Program counter bits
S9~S0: Stack register bits
#9~#0: Instruction code bits
@7~@0: PCL bits
Rev.1.10
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October 12, 2007
HT48RA0-3/HT48CA0-3
ble is well-defined, the other bits of the table word are
transferred to the lower portion of TBLH, the remaining 2 bits are read as ²0². The Table Higher-order byte
register (TBLH) is read only. The table pointer (TBLP)
is a read/write register (07H), where P indicates the
table location. Before accessing the table, the location
must be placed in TBLP. The TBLH is read only and
cannot be restored. All table related instructions need
2 cycles to complete the operation. These areas may
function as normal program memory depending upon
the requirements.
The conditional skip is activated by instruction. Once the
condition is met, the next instruction, fetched during the
current instruction execution, is discarded and a dummy
cycle replaces it to get the proper instruction. Otherwise
proceed with the next instruction.
The lower byte of the program counter (PCL) is a readable and writeable register (06H). Moving data into the
PCL performs a short jump. The destination will be
within 256 locations.
When a control transfer takes place, an additional
dummy cycle is required.
Stack Register - STACK
This is a special part of the memory used to save the
contents of the program counter only. The stack is organized into one level and is neither part of the data nor
part of the program space, and is neither readable nor
writeable. The activated level is indexed by the stack
pointer and is neither readable nor writeable. At a subroutine call the contents of the program counter are
pushed onto the stack. At the end of a subroutine signaled by a return instruction, RET, the program counter
is restored to its previous value from the stack. After a
chip reset, the SP will point to the top of the stack.
Program Memory - ROM
The program memory is used to store the program instructions which are to be executed. It also contains
data and table and is organized into 1024´14 bits, addressed by the program counter and table pointer.
Certain locations in the program memory are reserved
for special usage:
· Location 000H
This area is reserved for the initialization program. After a device reset, the program always begins execution at location 000H.
If the stack is full and a ²CALL² is subsequently executed, stack overflow occurs and the first entry will be
lost and only the most recent return address is stored.
· Table location
Any location in the Program Memory space can be
used as a look-up table. The instructions TABRDC [m]
(the current page, one page=256 words) and TABRDL
[m] (the last page) transfer the contents of the
lower-order byte to the specified data memory
register, and the higher-order byte to TBLH (08H).
Only the destination of the lower-order byte in the ta0 0 0 H
Data Memory - RAM
The data memory is divided into two functional groups:
special function registers and general purpose data
memory (32´8). Most are read/write, but some are read
only.
D e v ic e in itia liz a tio n p r o g r a m
The remaining space before the 20H is reserved for future expanded usage and reading these locations will
return the result 00H. The general purpose data memory, addressed from 20H to 3FH, is used for data and
control information under instruction command. All data
memory areas can handle arithmetic, logic, increment,
decrement and rotate operations directly. Except for some
dedicated bits, each bit in the data memory can be set and
reset by the SET [m].i and CLR [m].i instructions, respectively. They are also indirectly accessible through memory
pointer register (MP;01H).
n 0 0 H
P ro g ra m
L o o k - u p ta b le ( 2 5 6 w o r d s )
n F F H
L o o k - u p ta b le ( 2 5 6 w o r d s )
3 F F H
1 4 b its
Program Memory
Table Location
Instruction(s)
*9
*8
*7
*6
*5
*4
*3
*2
*1
*0
TABRDC [m]
P9
P8
@7
@6
@5
@4
@3
@2
@1
@0
TABRDL [m]
1
1
@7
@6
@5
@4
@3
@2
@1
@0
Table Location
Note:
*9~*0: Table location bits
P9~P8: Current program counter bits
Rev.1.10
@7~@0: Table pointer bits
5
October 12, 2007
HT48RA0-3/HT48CA0-3
0 0 H
IA R
0 1 H
M P
Indirect Addressing Register
Location 00H is an indirect addressing register that is
not physically implemented. Any read/write operation to
[00H] accesses the data memory pointed to by MP
(01H). Reading location 00H itself indirectly will return
the result 00H. Writing indirectly results in no operation.
0 2 H
0 3 H
0 4 H
0 5 H
A C C
0 6 H
P C L
0 7 H
T B L P
0 8 H
T B L H
The memory pointer register MP (01H) is a 7-bit register.
Bit 7 of MP is undefined and reading will return the result
²1². Any writing operation to MP will only transfer the
lower 7-bits of data to MP.
0 9 H
0 A H
S T A T U S
0 B H
Accumulator
0 C H
0 D H
0 E H
The accumulator closely relates to ALU operations. It is
also mapped to location 05H of the data memory and is
capable of carrying out immediate data operations. Data
movement between two data memory locations has to
pass through the accumulator.
S p e c ia l P u r p o s e
D a ta M e m o ry
0 F H
1 0 H
1 1 H
1 2 H
P A
1 3 H
1 4 H
Arithmetic and Logic Unit - ALU
P B
This circuit performs 8-bit arithmetic and logic operation.
The ALU provides the following functions.
1 5 H
1 6 H
· Arithmetic operations (ADD, ADC, SUB, SBC, DAA)
1 7 H
1 8 H
T S R 0
· Logic operations (AND, OR, XOR, CPL)
1 9 H
T S R 1
1 A H
· Rotation (RL, RR, RLC, RRC)
C A R L 0
1 B H
C A R L 1
1 C H
C A R H 0
1 D H
C A R H 1
· Increment and Decrement (INC, DEC)
· Branch decision (SZ, SNZ, SIZ, SDZ ....)
1 E H
: U n u s e d
1 F H
2 0 H
R e a d a s "0 0 "
The ALU not only saves the results of a data operation but
also changes the contents of the status register.
Status Register - STATUS
G e n e ra l P u rp o s e
D a ta M e m o ry
(3 2 B y te s )
3 F H
This 8-bit status register (0AH) 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). It also records the status information and controls the operation sequence.
RAM Mapping
Bit No.
Label
Function
0
C
C is set if the operation results in a carry during an addition operation or if a borrow does not
take place during a subtraction operation; otherwise C is cleared. C is also affected by a rotate through carry instruction.
1
AC
AC is set if the 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; otherwise AC is cleared.
2
Z
3
OV
OV is set if the operation results in a carry into the highest-order bit but not a carry out of the
highest-order bit, or vice versa; otherwise OV is cleared.
4
PDF
PDF is cleared when either a system power-up or executing the CLR WDT instruction. PDF
is set by executing the HALT instruction.
5
TO
TO is cleared by a system power-up or executing the CLR WDT or HALT instruction. TO is
set by a WDT time-out.
6~7
¾
Unused bit, read as ²0²
Z is set if the result of an arithmetic or logic operation is zero; otherwise Z is cleared.
Status (0AH) Register
Rev.1.10
6
October 12, 2007
HT48RA0-3/HT48CA0-3
With the exception of the TO and PDF flags, the other
status register bits can be altered by instructions like
most other register. Any data written into the status register will not change the TO or PDF flags. In addition it
should be noted that operations related to the status register may give different results from those intended. The
TO and PDF flags can only be changed by the Watchdog
Timer overflow, device power-up, clearing the Watchdog
Timer and executing the HALT instruction.
Watchdog Timer - WDT
The Z, OV, AC and C flags generally reflect the status of
the latest operations.
The WDT timer is designed to prevent a software malfunction or sequence jumping to an unknown location
with unpredictable results. The Watchdog Timer can be
disabled by configuration option. If the Watchdog Timer
is disabled, all the executions related to the WDT result
in no operation and the WDT will lose its protection purpose. In this situation the logic can only be restarted by
external logic.
The WDT clock source is implemented by the instruction
clock which is the system clock divided by 4. The clock
source is processed by a frequency divider and a
prescaler to provide various time out periods.
WDT time out period =
Where n= 8~11 selected by a configuration option.
In addition, on executing a subroutine call, the status
register will not be automatically pushed onto the stack.
If the contents of the status are important and if the subroutine can corrupt the status register, precautions must
be taken to save it properly.
Oscillator Configuration
A WDT overflow under normal operation will initialise a
²chip reset² and set the status bit ²TO². To clear the contents of the WDT prescaler, two methods are adopted,
software instructions or a HALT instruction. There are two
types of software instructions. One type is the single instruction ²CLR WDT², the other type comprises two instructions, ²CLR WDT1² and ²CLR WDT2². Of these two
types of instructions, only one can be active depending on
the configuration option - ²CLR WDT times selection option². If the ²CLR WDT² is selected (i.e.. CLR WDT times
equal one), any execution of the CLR WDT instruction will
clear the WDT. In case ²CLR WDT1² and ²CLR WDT2² are
chosen (i.e.. CLR WDT times equal two), these two instructions must be executed to clear the WDT; otherwise,
the WDT may reset the chip due to a time-out.
Only an external RC oscillator type is supported for the
HT48RA0-3/HT48CA0-3.
O S C 1
1 2 k W
R C
Clock Source
2n
O s c illa to r
System Oscillator
An external resistor between OSC1 and VSS in needed
whose resistance must be 12kW for a 4MHz frequency.
The RC oscillator provides ± 3% accuracy, the conditions are:
· VDD= 2.0V ~ 3.6V
· Temperature = 0°C ~ +50°C
· fSYS= 4MHz
C le a r W D T
F r e q u e n c y D iv id e r
C lo c k S o u r c e
( S y s te m C lo c k /4 )
3 - b it C o u n te r
P r e s c a lle r
( 8 - b it)
C o d e O p tio n
S e le c t
C o d e
O p tio n
W D T
T im e - o u t
C lo c k S o u r c e
2 n
(n = 8 ~ 1 1 )
Watchdog Timer
Rev.1.10
7
October 12, 2007
HT48RA0-3/HT48CA0-3
Power Down Operation - HALT
Some registers remain unchanged during reset conditions. Most registers are reset to the ²initial condition²
when the reset conditions are met. By examining the
PDF and TO flags, the program can distinguish between
different chip resets.
The Power-down mode is initialised by the HALT instruction and results in the following:
· The system oscillator turns off and the WDT stops.
· The contents of the on-chip Data Memory and regis-
ters remain unchanged.
TO
PDF
· WDT prescaler is cleared.
0
0
Power-on reset during power-up
u
u
LVR reset during normal operation
1
u
WDT time-out during normal operation
· All I/O ports maintain their original status.
· The PDF flag is set and the TO flag is cleared.
The system can quit the HALT mode by means of an external falling edge signal on port B. By examining the TO
and PDF flags, the reason for chip reset can be determined. The PDF flag is cleared when the system powers
up or when a CLR WDT instruction is executed and is set
when the HALT instruction is executed. The TO flag is set
if the WDT time-out occurs during normal operation.
RESET Conditions
Note: ²u² means unchanged.
To guarantee that the system oscillator has started and
stabilized, the SST (System Start-up Timer) provides an
extra-delay of 1024 system clock pulses when the system powers up or when the system awakes from a HALT
state.
The port B wake-up can be considered as a continuation
of normal execution. Each bit in port B can be independently selected to wake up the device by the code option.
Awakening from an I/O port stimulus, the program will
resume execution of the next instruction.
When a system power up occurs, an SST delay is added
during the reset period. Any wake-up from HALT will enable the SST delay.
The functional unit chip reset status is shown below.
Once a wake-up event(s) occurs, it takes 1024 tSYS
(system clock periods) to resume normal operation. In
other words, a dummy cycle period will be inserted after
the wake-up.
To minimize power consumption, all I/O pins should be
carefully managed before entering the HALT status.
Program Counter
000H
WDT Prescaler
Clear
Input/Output ports
Input mode
Stack Pointer
Points to the top of the stack
Carrier output
Low level
Reset
There are three ways in which a reset can occur:
H A L T
· Power On reset
W D T
· Low Voltage reset
· WDT time-out reset during normal operation
C o ld R e s e t
L V R
O S C 1
V D D
S S T
1 0 -s ta g e
R ip p le C o u n te r
P o w e r - o n D e te c tio n
P o w e r-o n R e s e t
tR
S T D
Reset Configuration
S S T T im e - o u t
In te rn a l R e s e t
Reset Timing Chart
Rev.1.10
8
October 12, 2007
HT48RA0-3/HT48CA0-3
The chip reset status of the registers is summarised in the following table:
Power On
Low Voltage Reset
WDT Time-out
(Normal Operation)
000H
000H
000H
MP
-xxx xxxx
-uuu uuuu
-uuu uuuu
ACC
xxxx xxxx
uuuu uuuu
uuuu uuuu
TBLP
xxxx xxxx
uuuu uuuu
uuuu uuuu
TBLH
--xx xxxx
--uu uuuu
--uu uuuu
STATUS
--00 xxxx
--uu uuuu
--1u uuuu
PA
1111 1111
1111 1111
1111 1111
PB
1111 1111
1111 1111
1111 1111
TSR0
0000 0000
0000 0000
0000 0000
TSR1
1000 0000
1000 0000
1000 0000
CARL0
0000 0000
0000 0000
0000 0000
CARL1
0000 0000
0000 0000
0000 0000
CARH0
0000 0000
0000 0000
0000 0000
CARH1
0000 0010
0000 0010
0000 0010
Register
Program Counter
Note:
²u² means unchanged
²x² means unknown
²-² stands for unimplemented
Input/Output Ports
When PA and PB0~PB1 is used for input operation, it
should be noted that before reading data from the pads,
a ²1² should be written to the related bits to disable the
NMOS device. That is, the instruction ²SET [m].i² (i=0~7
for PA, i=0~1 for PB) is executed first to disable related
NMOS device, and then ²MOV A, [m]² to get stable data.
There are an 8-bit bidirectional input/output port, a 6-bit
input with 2-bit I/O port in the HT48RA0-3/HT48CA0-3,
labeled PA and PB which are mapped to [12H], [14H] of
the Data Memory, respectively. Each bit of PA can be selected as NMOS output or Schmitt trigger input with
pull-high resistor by a software instruction. PB0~PB1
have the same structure as PA, while PB2~PB6 can only
be used for input operation - Schmitt trigger with pull-high
resistors. PB7 is used for input operation - Schmitt trigger
but without pull-high resistor.
After chip reset, PA and PB remain at a high level input
line. Each bit of PA and PB0~PB1 output latches can be
set or cleared by the ²SET [m].i² and ²CLR [m].i²
(m=12H or 14H) instructions respectively.
Some instructions first input data and then follow the
output operations. For example, ²SET [m].i², ²CLR [m]²,
²CPL [m]², ²CPLA [m]² read the entire port states into
the CPU, execute the defined operations (bit-operation),
and then write the results back to the latches or to the
accumulator.
When PA and PB are used for input operation, these
ports are non-latched, that is, the inputs should be ready
at the T2 rising edge of the instruction ²MOV A, [m]²
(m=12H or 14H). For PA and PB0~PB1 output operation, all data is latched and remains unchanged until the
output latch is rewritten.
Each line of PB has a wake-up capability selectable via
a configuration option.
Rev.1.10
9
October 12, 2007
HT48RA0-3/HT48CA0-3
V
D a ta b u s
W r ite
D
W e a k
P u ll- u p
Q
C K
S
D D
P A 0 ~ P A 7
P B 0 ~ P B 1
Q
C h ip R e s e t
R e a d D a ta
S y s te m
W a k e -u p
C o d e O p tio n
P B 0 ~ P B 1 o n ly
PA, PB0~PB1 Input/Output Lines
V
D D
P u ll- u p
R e a d D a ta
D a ta b u s
S y s te m
P B 2 ~ P B 6
W a k e -u p
C o d e O p tio n
PB2~PB6 Input Lines
D a ta B u s
R e a d D a ta
S y s te m
P B 7
W a k e -u p
C o d e O p tio n
PB7 Input Line
Timer
Timer Operation
The timer is an internal unit for creating a remote control
transmission pattern. As shown, it consists of a 9-bit
down counter (t8 to t0), a flag (t9) permitting the 1-bit
timer output, and a zero detector.
The timer starts counting down when a value other than
²0² is set for the down counter with a timer manipulation
instruction. The timer manipulation instructions for making the timer start operation are shown below:
No.
Label
MOV A,XXH
Function
; XX = 00H ~ FFH
MOV TSR0,A
0~7
t0~t7
Down counter
MOV A,XXH
TSR0 (18H) Register
SET TSR1.1
No.
Label
0
t8
Down counter
1
t9
Timer enable, initial value is ²0².
2~6
¾
Unused bit, read as ²0².
7
TOEF
; XX £ 01H, t8
MOV TSR1,A
Function
; The timer is started by set t9=1
Addition notes for the 9-bit timer:
· Writing to TSR0 will only put the written data to the
TSR0 register (t7~t0) and writing to TSR1 (t8) will
transfer the specified data and contents of TSR0 to
the Down Counter. TOEF will be cleared after the data
transferred from TSR1 and TSR0 to the Down Counter is completed and then wait until TSR1.1 is set by
user.
Timer operation end flag, initial
value is ²1².
TSR1 (19H) Register
· Setting TSR1.1=1, the timer will start counting. The
timer will stop when its count is equal to ²0² and then
TOEF is set equal to ²1².
Rev.1.10
10
October 12, 2007
HT48RA0-3/HT48CA0-3
· If the TSR1.1 is cleared during the timer counting, the
In the case above, the timer output time is as follows.
timer will be stopped. Once the TSR1.1 is set
(1®0®1), the down counter will reload data from
t8~t0, and then the down counter begins counting
down with the new load data.
(Set value+1) ´ 64/fSYS
= (511+1) ´ 16ms
= 8.192ms
· If TSR1.1 and TOEF are equal to 1 both, the timer can
re-start, after new data is written to TSR0, TSR1
(t0~t8) in sequence.
Note:
R E M
8 .1 9 2 m s
If the contents of the Down counter is 000H, set
the t9 to start the timer counting, the timer will
only count 1 step. The timer output
time=64/fSYS. ® [ (0+1) ´ 64/fSYS=64/fSYS ]
By setting the flag (t9) that enables the timer output to
²1², the timer can output its operation status from the
REM pin. The REM pin can also output the carrier while
the timer is in operation.
The down counter is decremented (-1) in the cycle of
64/fSYS. If the value of the down counter becomes ²0²,
the zero detector generates the timer operation end signal to stop the timer operation. At this time, TOEF will be
set to ²1². The output of the timer operation end signal is
continued while the down counter is ²0² and the timer is
stopped. The following relational expression applies between the timer¢s output time and the down counter¢s
set value.
Note:
The carrier output results if bit 9 of the high-level
period setting modulo register (CARH) is
cleared (²0²).
R E M
T im e r O u tp u t T im e :
( S e t v a lu e + 1 ) x 6 4 /fS
Timer output time = (Set value+1) ´ 64/fSYS
Y S
Timer Output when Carrier is not Output
An example is shown below.
MOV A,0FFH
MOV TSR0,A
MOV A,01H
MOV TSR1,A
SET TSR1.1
tS
t9
tS
R 1
t8
t7
t6
t5
R 0
t4
t3
t2
t1
D o w n C o u n te r, (t8 ~ t0 )+ 1
t0
C o u n t
C lo c k
fS
Y S
/6 4
t9
T O E F
Z e ro D e te c to r
C a r r ie r
S y n c h ro n o u s
C ir c u it
R E M
C a r r ie r S ig n a l
Timer Configuration
Rev.1.10
11
October 12, 2007
HT48RA0-3/HT48CA0-3
Carrier Output
· Carrier output generator
The carrier generator consists of a 9-bit counter and two modulo registers for setting the high-level and low-level periods - CARH and CARL respectively.
Register
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
CARL0
CL.7
CL.
CL.
CL.
CL.3
CL.2
CL.1
CL.0
CARL1
¾
¾
¾
¾
¾
¾
Fix ²0²
CL.8
CARH0
CH.7
CH.6
CH.5
CH.4
CH.3
CH.2
CH.1
CH.0
CARH1
¾
¾
¾
¾
¾
¾
CH.9
(CARY)
CH.8
CARL0 (1AH) Register, CARL1 (1BH), CARH0 (1CH) Register, CARH1 (1DH), Register
Note: 1. CARH1.1 (CARY) initial value is ²1².
2. CARL1.2 (CARH1.2)~CARL1.7 (CARH1.7) are unused bits, read as ²0².
The carrier duty ratio and carrier frequency can be determined by setting the high-level and low-level widths using the
respective modulo registers. Each of these widths can be set in a range of 500ns to 64ms at fSYS = 4MHz.
CARH (CARH1.0, CARH0.7~CARH0.0) and CARL (CARL1.0, CARL0.7~CARL0.0) are read and written using instructions.
Example:
MOV
A,XXH
MOV
CARL0,A
; XXH = 00H~FFH
; XXH £ 01H, CL.8 (CARL1.0)
MOV
A,XXH
MOV
CARL1,A
MOV
A,XXH
MOV
CARH0,A
; XXH = 00H~FFH
; XXH ³ 02H, CH.8 (CARH1.0)
MOV
A,XXH
MOV
CARH1,A
CLR
CARH1.1
; The carrier is started by clearing CARY(CARH1.1)=²0²
C A R H
C A R H 1
C a r r ie r
S ig n a l
C H .9
C A R Y
C A R L
C A R H 0
C H .8
C H .7
C H .6
C H .5
C H .4
C H .3
C A R L 1
C H .2
C H .1
C H .0
M o d u lo r e g is te r fo r s e ttin g th e h ig h - le v e l p e r io d
(C A R H .8 ~ C A R H .0 )
C L .9 (0 )
N o te 1 .
C A R L 0
C L .8
C L .7
C L .6
C L .5
C L .4
C L .3
C L .2
C L .1
C L .0
M o d u lo r e g is te r fo r s e ttin g th e lo w - le v e l p e r io d
(C A R L .8 ~ C A R L .0 )
S e le c to r
F /F
M a tc h
C le a r
C o m p a ra to r
9 - b it C o u n te r
fS
Y S
t9 (N o te 2 )
fS
Y S
Configuration of Remote Controller Carrier Generator
Note:
1. Bit 9 of the modulo register for setting the low-level period (CARL) is fixed to ²0².
2. t9: Flag that enables timer output (timer block, see Timer Configuration)
Rev.1.10
12
October 12, 2007
HT48RA0-3/HT48CA0-3
The values of CARH and CARL can be calculated from the following expressions.
CARL (CARL1.0, CARL0.7~CARL0.0) = ( fSYS ´ (1-D) ´ T) - 1
CARH (CARH1.0, CARH0.7~CARH0.0) = ( fSYS ´ D ´ T) - 1
D: Carrier duty ratio (0 < D < 1)
fSYS: Input clock (Mhz)
T: Carrier cycle (ms)
Ensure to input values in the range of 001H to 1FFH to CARL and CARH.
Example:
fSYS = 4MHz, fc = 38.1kHz, T = 1/ fc = 26.25ms, duty = 1/3
CARL = (4M ´ (1-1/3) ´ 26.25ms) - 1 = 69 = 45H
CARH = (4M ´ 1/3 ´ 26.25ms) - 1 = 34 = 22H
MOV
A,045H
MOV
CARL0,A
MOV
A,022H
MOV
CARH0,A
CLR
CARH1.1
; The carrier is started by clearing CARY(CARH1.1) = ²0²
· Carrier output control
The remote controller carrier can be output from the REM pin by clearing (0) bit 9 (CARY) of the modulo register for
setting the high-level period (CARH).
When performing a carrier output, be sure to set the timer operation after setting the CARH (CARH1.0,
CARH0.7~CARH0.0) and CARL (CARL1.0, CARL0.7~CARL0.0) values.
Note that a malfunction may occur if the values of CARH (CARH1.0, CARH0.7~CARH0.0) and CARL (CARL1.0,
CARL0.7~CARL0.0) are changed while the carrier is being output from the REM pin.
Executing the timer manipulation instruction starts the carrier output from the low level.
T im e r O u tp u t T im e :
( S e t v a lu e + 1 ) x 6 4 /fS Y
S
T im e r O u tp u t
C a r r ie r
tL
S e e N o te
tH
Timer Output when Carrier Is an Output
Note:
When the carrier signal is active and during the time when the signal is high, if the timer output should go low,
the carrier signal will first complete its high level period before going low.
Rev.1.10
13
October 12, 2007
HT48RA0-3/HT48CA0-3
The output from the REM pin is as follows, in accordance with the values set to bit 9 (CARY) of CARH and the timer
output enable flag (t9), and the value of the timer block¢s 9-bit down counter (t0 to t8).
CARH1.1
(CARY)
Timer Output Enable Flag
(t9: TSR1.1)
9-bit Down Counter
(TSR0.0~TSR0.7, TSR1.0)
REM Pin
0
0
0
0
0
Other than 0
0
1
0
0
1
Other than 0
1
0
¾
Low-level output
1
1
¾
High-level output
Low-level output
64/fsys (with carrier output)
Carrier output (Note)
Note: Input values in the range of 001H to 1FFH to CARH (CARH1.0, CARH0.7~CARH0.0) and
CARL (CARL1.0, CARL0.7~CARL0.0).
Caution: CARH (CARH1.0, CARH0.7~CARH0.0) and CARL (CARL1.0, CARL0.7~CARL0.0) must be set while the
REM pin is low level (t9 = 0 or t0 to t8 = 0).
CARH (CARH1.0,
CARH0.7~CARH0.0)
CARL (CARL1.0,
CARL0.7~CARL0.0)
tH (ms)
tL (ms)
t (ms)
fC (kHz)
Duty
01H
01H
0.5
0.5
1.0
1000
1/2
03H
05H
1.0
1.5
2.5
400
2/5
09H
09H
2.5
2.5
5.0
200
1/2
13H
13H
5.0
5.0
10.0
100
1/2
20H
20H
8.25
8.25
16.5
60.6
1/2
21H
41H
8.25
16.75
25
40
1/3
22H
44H
8.75
17.25
26.0
38.5
1/3
22H
45H
8.75
17.5
26.25
38.10
1/3
22H
46H
8.8
17.6
26.4
37.9
1/3
23H
48H
9.0
18.25
27.25
36.7
1/3
24H
49H
9.26
18.52
27.78
36.0
1/3
34H
6AH
13.33
26.66
40.0
25
1/3
3BH
3BH
15.0
15.0
30.0
33.3
1/2
63H
63H
25.0
25.0
50.0
20
1/2
7FH
7FH
32.0
32.0
64.0
15.6
1/2
Carrier Frequency Setting (fSYS=4MHz)
tL
tH
C a r r ie r S ig n a l
t
Rev.1.10
14
October 12, 2007
HT48RA0-3/HT48CA0-3
Low Voltage Reset - LVR
The relationship between VDD and VLVR is shown below.
The microcontroller provides a low voltage reset circuit
in order to monitor the supply voltage of the device. If the
supply voltage of the device is within the range
0.9V~VLVR, such as when changing a battery, the LVR
will automatically reset the device internally.
V D D
3 .6 V
The LVR includes the following specifications:
V
L V R
1 .9 V
· The low voltage (0.9V~VLVR) has to remain in this
state for a time in excess of 1ms. If the low voltage
state does not exceed 1ms, the LVR will ignore it and
will not perform a reset function.
0 .9 V
V
D D
3 .6 V
V
L V R D e te c t V o lta g e
L V R
0 .9 V
0 V
R e s e t S ig n a l
N o r m a l O p e r a tio n
R e s e t
R e s e t
*1
*2
Low Voltage Reset
Note:
²*1² To make sure that the system oscillator has stabilised, the SST provides an extra delay of 1024 system
clock pulses before entering normal operation.
²*2² Since low voltage has to be maintained in its original state and exceed 1ms, a 1ms delay enters
the reset mode.
Configuration Options
The following table shows eight kinds of configuration options for the HT48RA0-3/HT48CA0-3. All the configuration options must be defined to ensure proper system functioning.
No.
Code Option
1
WDT time-out period selection
2n
, where n=8~11.
Time-out period=
Clock Source
2
WDT enable/disable selection. This option is to decide whether the WDT timer is enabled or disabled.
3
CLR WDT times selection. This option defines how to clear the WDT by instruction. ²One time² means that the
CLR WDT instruction can clear the WDT. ²Two times² means only if both of the CLR WDT1 and CLR WDT2 instructions have been executed, the WDT can be cleared.
4
Wake-up selection. This option defines the wake-up activity function. External input pins (PB only) all have the
capability to wake-up the device.
5
LVR function: enable or disable
Rev.1.10
15
October 12, 2007
HT48RA0-3/HT48CA0-3
Application Circuits
P A 0 ~ P A 7
O S C
C ir c u it
V
P B 0 ~ P B 1
O S C 1
D D
P B 2 ~ P B 7
4 7 0 p F
R
R E M
H T 4 8 R A 0 -3 /H T 4 8 C A 0 -3
O S C 1
R C S y s te m
R O S C = 1 2 k W
O s c illa to r
O S C
O S C
C ir c u it
Example
P B 1
P B 0
P A 3
P A 2
P A 1
P A 0
P B 3
P B 4
P B 5
P B 6
P B 7
3 3 W
1 W
P B 2
V D D
1 0 0 m F
P A 7
P A 6
V b a t
P A 5
2 2 0 W ~ 1 k W
O S C
C ir c u it
R E M
P A 4
O S C 1
H T 4 8 R A 0 -3 /H T 4 8 C A 0 -3
Rev.1.10
16
October 12, 2007
HT48RA0-3/HT48CA0-3
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
Central to the successful operation of any
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
Rev.1.10
17
October 12, 2007
HT48RA0-3/HT48CA0-3
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]
Rev.1.10
Increment Data Memory with result in ACC
Increment Data Memory
Decrement Data Memory with result in ACC
Decrement Data Memory
18
October 12, 2007
HT48RA0-3/HT48CA0-3
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.
Rev.1.10
19
October 12, 2007
HT48RA0-3/HT48CA0-3
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
Rev.1.10
20
October 12, 2007
HT48RA0-3/HT48CA0-3
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
Rev.1.10
21
October 12, 2007
HT48RA0-3/HT48CA0-3
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
Rev.1.10
22
October 12, 2007
HT48RA0-3/HT48CA0-3
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
Rev.1.10
23
October 12, 2007
HT48RA0-3/HT48CA0-3
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
24
October 12, 2007
HT48RA0-3/HT48CA0-3
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
25
October 12, 2007
HT48RA0-3/HT48CA0-3
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
26
October 12, 2007
HT48RA0-3/HT48CA0-3
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
27
October 12, 2007
HT48RA0-3/HT48CA0-3
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
28
October 12, 2007
HT48RA0-3/HT48CA0-3
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
29
October 12, 2007
HT48RA0-3/HT48CA0-3
Package Information
20-pin SOP (300mil) 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
394
¾
419
B
290
¾
300
C
14
¾
20
C¢
490
¾
510
D
92
¾
104
E
¾
50
¾
F
4
¾
¾
G
32
¾
38
H
4
¾
12
a
0°
¾
10°
30
October 12, 2007
HT48RA0-3/HT48CA0-3
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°
31
October 12, 2007
HT48RA0-3/HT48CA0-3
Product Tape and Reel Specifications
Reel Dimensions
D
T 2
A
C
B
T 1
SOP 20W
Symbol
Description
A
Reel Outer Diameter
B
Reel Inner Diameter
Dimensions in mm
330±1.0
62±1.5
13.0+0.5
-0.2
C
Spindle Hole Diameter
D
Key Slit Width
2.0±0.5
T1
Space Between Flange
24.8+0.3
-0.2
T2
Reel Thickness
30.2±0.2
SSOP 20S (150mil)
Symbol
Description
A
Reel Outer Diameter
B
Reel Inner Diameter
Dimensions in mm
330±1.0
62±1.5
13.0+0.5
-0.2
C
Spindle Hole Diameter
D
Key Slit Width
2.0±0.5
T1
Space Between Flange
16.8+0.3
-0.2
T2
Reel Thickness
22.2±0.2
Rev.1.10
32
October 12, 2007
HT48RA0-3/HT48CA0-3
Carrier Tape Dimensions
P 0
D
P 1
t
E
F
W
C
D 1
B 0
P
K 0
A 0
SOP 20W
Symbol
W
Description
Dimensions in mm
24.0+0.3
-0.1
Carrier Tape Width
P
Cavity Pitch
12.0±0.1
E
Perforation Position
1.75±0.1
F
Cavity to Perforation (Width Direction)
11.5±0.1
D
Perforation Diameter
1.5+0.1
D1
Cavity Hole Diameter
1.5+0.25
P0
Perforation Pitch
4.0±0.1
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
t
Carrier Tape Thickness
0.3±0.05
C
Cover Tape Width
21.3
SSOP 20S (150mil)
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
16.0+0.3
-0.1
P
Cavity Pitch
8.0±0.1
E
Perforation Position
1.75±0.1
F
Cavity to Perforation (Width Direction)
7.5±0.1
D
Perforation Diameter
1.5+0.1
D1
Cavity Hole Diameter
1.5+0.25
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
t
Carrier Tape Thickness
C
Cover Tape Width
Rev.1.10
2.3±0.1
0.30±0.05
13.3
33
October 12, 2007
HT48RA0-3/HT48CA0-3
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)
7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233
Tel: 86-21-6485-5560
Fax: 86-21-6485-0313
http://www.holtek.com.cn
Holtek Semiconductor Inc. (Shenzhen Sales Office)
5/F, Unit A, Productivity Building, Cross of Science M 3rd Road and Gaoxin M 2nd Road, Science Park, 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 Inc. (Chengdu Sales Office)
709, Building 3, Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016
Tel: 86-28-6653-6590
Fax: 86-28-6653-6591
Holtek Semiconductor (USA), Inc. (North America Sales Office)
46729 Fremont Blvd., Fremont, CA 94538
Tel: 1-510-252-9880
Fax: 1-510-252-9885
http://www.holtek.com
Copyright Ó 2007 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
34
October 12, 2007