HOLTEK HT1626

HT1626
RAM Mapping 48´16 LCD Controller for I/O MCU
PATENTED
PAT No. : 099352
Technical Document
· Application Note
Features
· Operating voltage: 2.7V~5.2V
· Built-in LCD display RAM
· Built-in RC oscillator
· R/W address auto increment
· External 32.768kHz crystal or 32kHz frequency
· Two selection buzzer frequencies (2kHz or 4kHz)
source input
· Power down command reduces power consumption
· 1/5 bias, 1/16 duty, frame frequency is 64Hz
· Software configuration feature
· Max. 48´16 patterns, 16 commons, 48 segments
· Data mode and Command mode instructions
· Built-in internal resistor type bias generator
· Three data accessing modes
· 3-wire serial interface
· VLCD pin to adjust LCD operating voltage
· 8 kinds of time base or WDT selection
· 100-pin QFP package
· Time base or WDT overflow output
General Description
HT1626 make it suitable for multiple LCD applications
including LCD modules and display subsystems. Only
three lines are required for the interface between the
host controller and the HT1626. The HT162X series
have many kinds of products that match various applications.
HT1626 is a peripheral device specially designed for I/O
type MCU used to expand the display capability. The
max. display segment of the device are 768 patterns
(48´16). It also supports serial interface, buzzer sound,
Watchdog Timer or time base timer functions. The
HT1626 is a memory mapping and multi-function LCD
controller. The software configuration feature of the
Selection Table
HT162X
HT1620
HT1621
HT1622
HT16220
HT1623
HT1625
HT1626
COM
4
4
8
8
8
8
16
SEG
32
32
32
32
48
64
48
Built-in Osc.
¾
Ö
Ö
¾
Ö
Ö
Ö
Crystal Osc.
Ö
Ö
¾
Ö
Ö
Ö
Ö
Rev. 1.60
1
November 9, 2010
PATENTED
HT1626
Block Diagram
D is p la y R A M
O S C O
O S C I
C S
C o n
a n
T im
C ir c
R D
W R
tro l
d
in g
u it
C O M 0
C O M 1 5
L C D D r iv e r /
B ia s C ir c u it
D A T A
S E G 0
S E G 4 7
V D D
V L C D
V S S
B Z
W a tc h d o g T im e r
a n d
T im e B a s e G e n e r a to r
T o n e F re q u e n c y
G e n e ra to r
B Z
IR Q
Pin Assignment
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
3 0
3 1
3 2
3 3
3 4
3 5
3 6
3 7
3 8
3 9
4 0
4 1
4 2
4 3
4 4
4 5
4 6
4 7
C S
R D
O
C
C
C
W R
D A T A
N C
N C
V S S
O S C I
S C O
V D D
V L C D
IR Q
B Z
B Z
T 1
T 2
T 3
T 4
C O M 0
C O M 1
C O M 2
C O M 3
C O M 4
N C
C O M 5
C O M 6
C O M 7
C O M 8
C O M 9
O M 1 0
O M 1 1
O M 1 2
1 0 0 9 9 9 8 9 7 9 6 9 5 9 4 9 3 9 2 9 1 9 0 8 9 8 8 8 7 8 6 8 5 8 4 8 3 8 2 8 1
1
8 0
2
7 9
3
7 8
4
7 7
5
7 6
6
7 5
7
7 4
8
7 3
9
7 2
1 0
7 1
1 1
7 0
1 2
6 9
1 3
6 8
1 4
6 7
H T 1 6 2 6
1 0 0 Q F P -A
1 5
1 6
6 6
6 5
1 7
6 4
1 8
6 3
1 9
6 2
2 0
6 1
2 1
6 0
2 2
5 9
2 3
5 8
2 4
5 7
2 5
5 6
2 6
5 5
2 7
5 4
2 8
5 3
2 9
5 2
3 0
3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 5 0
5 1
S E G
S E G
S E G
S E G
S E G
S E G
N C
N C
N C
N C
N C
N C
N C
N C
N C
N C
N C
N C
N C
N C
N C
N C
N C
S E G
S E G
S E G
S E G
S E G
S E G
S E G
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
C O M
C O M
C O M
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
1 5
2
8
7
6
5
4
3
2
1
0
1 4
1 3
Rev. 1.60
November 9, 2010
PATENTED
HT1626
Pad Assignment
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
2 8
2 4
2 9
2 5
3 0
2 6
3 1
2 7
3 4
3 2
3 5
3 3
3 6
3 7
6 7
6 6 6 5
6 4
6 3
6 2
6 1 6 0
5 9
5 8
5 7
5 6
5 5 5 4
3 6
3 7
3 9
4 0
4 1
4 2
4 4 4 5
4 6
4 7
4 8
6 9 6 8
3 8
3 9
7 1 7 0
4 0
7 2
4 1
7 3
4 2
7 4
4 3
4 4
7 5
4 5
7 6
4 6
7 7
4 7
D A T A
C S
R D
W R
V S S
7 8
5 3
5 2
4 9 5 0
5 1
2
V D D
3
V L C D
4
5
B Z
6
B Z
7
T 1
7 9
1
O S C I
O S C O
IR Q
8 0
(0 , 0 )
8
T 2
9
T 3
1 0
T 4
C O M 0
1 2
1 1
C O M 1
C O M 2
1 3
C O M 3
C O M 4
1 5
1 4
1 6
1 7
1 8
1 9
2 0
2 1 2 2 2 3
2 4
2 5
2 6
2 7
2 8
2 9
3 0
3 1 3 2
3 3
3 4
3 5
3 8
4 3
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
C O M
C O M
C O M
C O M
C O M
C O M
C O M
C O M
C O M
C O M
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
1 5
1 0
9
8
7
6
5
4
3
2
1
0
1 4
1 3
1 2
1 1
1 0
9
8
7
6
C O M 5
Chip size: 148 ´ 123 (mil)2
* The IC substrate should be connected to VDD in the PCB layout artwork.
Rev. 1.60
3
November 9, 2010
PATENTED
HT1626
Pad Coordinates
Unit: mm
Pad No.
X
Y
Pad No.
X
Y
1
2
-1745.115
1195.533
41
729.836
-1455.425
-1745.115
1096.513
42
828.935
-1455.425
3
-1744.679
775.806
43
927.956
-1455.425
4
-1744.765
651.256
44
1027.055
-1455.425
5
-1751.917
505.882
45
1126.075
-1455.425
6
-1746.120
308.253
46
1225.175
-1455.425
7
-1746.120
19.855
47
1324.196
-1455.425
8
-1744.765
-131.999
48
1423.294
-1455.425
9
-1744.765
-317.380
49
1522.315
-1455.425
10
-1744.765
-416.479
50
1621.415
-1455.425
11
-1744.765
-601.860
51
1720.436
12
-1744.765
-700.959
52
1766.902
-1455.425
1453.104
13
-1744.765
-886.341
53
1667.883
1453.104
14
-1744.765
-985.440
54
1568.782
1453.104
15
-1744.765
-1170.821
55
1469.762
1453.104
16
-1744.765
-1269.919
56
1370.662
1453.104
17
-1744.765
-1455.300
57
1271.642
1453.104
18
-1548.505
-1455.425
58
1172.542
1453.104
19
-1449.484
-1455.425
59
1073.522
1453.104
20
-1350.385
-1455.425
60
974.422
1453.104
21
-1251.365
-1455.425
61
875.402
1453.104
22
-1152.266
-1455.425
62
776.302
1453.104
23
-1053.245
-1455.425
63
677.282
1453.104
24
-954.146
-1455.425
64
578.182
1453.104
25
-855.125
-1455.425
65
479.163
1453.104
26
-756.026
-1455.425
66
380.062
1453.104
27
-657.005
-1455.425
67
281.042
1453.104
28
-557.906
-1455.425
68
181.943
1453.104
29
-458.885
-1455.425
69
82.923
1453.104
30
-359.786
-1455.425
70
-16.177
1453.104
31
-260.764
-1455.425
71
-115.197
1453.104
32
-161.665
-1455.425
72
-214.298
1453.104
33
-1455.425
-313.318
1453.104
34
-62.645
36.454
73
-1455.425
74
-412.417
1453.104
35
135.475
-1455.425
75
-511.438
1453.104
36
234.574
-1455.425
76
-610.536
1453.104
37
333.596
-1455.425
77
-709.557
1453.104
38
432.695
-1455.425
78
-808.656
1453.104
39
531.716
-1455.425
79
-977.680
1453.104
40
630.815
-1455.425
80
-1207.287
1453.629
Rev. 1.60
4
November 9, 2010
PATENTED
HT1626
Pad Description
Pad No.
Pad Name
I/O
Description
The OSCI and OSCO pads are connected to a 32.768kHz crystal in order to
generate a system clock. If the system clock comes from an external clock
source, the external clock source should be connected to the OSCI pad. But
if an on-chip RC oscillator is selected instead, the OSCI and OSCO pads
can be left open.
1
OSCI
I
2
OSCO
O
3
VDD
¾
4
VLCD
I
LCD operating voltage input pad.
5
IRQ
O
Time base or Watchdog Timer overflow flag, NMOS open drain output
6, 7
BZ, BZ
O
2kHz or 4kHz tone frequency output pair
8~11
T1~T4
I
Not connected
12~27
COM0~COM15
O
LCD common outputs
28~75
SEG0~SEG47
O
LCD segment outputs
I
Chip selection input with pull-high resistor. When the CS is logic high, the
data and command read from or write to the HT1626 are disabled. The serial interface circuit is also reset. But if the CS is at logic low level and is input to the CS pad, the data and command transmission between the host
controller and the HT1626 are all enabled.
76
CS
Positive power supply
77
RD
I
READ clock input with pull-high resistor. Data in the RAM of the HT1626 are
clocked out on the falling edge of the RD signal. The clocked out data will
appear on the data line. The host controller can use the next rising edge to
latch the clocked out data.
78
WR
I
WRITE clock input with pull-high resistor. Data on the DATA line are latched
into the HT1626 on the rising edge of the WR signal.
79
DATA
I/O
Serial data input or output with pull-high resistor
80
VSS
¾
Negative power supply, ground
Absolute Maximum Ratings
Supply Voltage .........................................-0.3V to 5.5V
Storage Temperature ............................-50°C to 125°C
Input Voltage.............................VSS-0.3V to VDD+0.3V
Operating Temperature...........................-25°C to 75°C
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.
Rev. 1.60
5
November 9, 2010
PATENTED
HT1626
D.C. Characteristics
Symbol
Parameter
VDD
Operating Voltage
IDD1
Operating Current
IDD2
Operating Current
IDD11
Operating Current
IDD22
Operating Current
ISTB
Standby Current
VIL
Input Low Voltage
VIH
Input High Voltage
IOL1
BZ, BZ, IRQ
IOH1
BZ, BZ
IOL2
DATA
IOH2
DATA
IOL3
LCD Common Sink Current
Test Conditions
VDD
Conditions
¾
¾
3V
5V
3V
5V
3V
5V
3V
5V
No load or LCD ON
On-chip RC oscillator
No load or LCD ON
Crystal oscillator
No load or LCD OFF
On-chip RC oscillator
No load or LCD OFF
Crystal oscillator
3V
No load, Power down mode
5V
3V
3V
IOL4
LCD Segment Sink Current
IOH4
LCD Segment Source Current
RPH
Pull-high Resistor
Typ.
Max.
Unit
2.7
¾
5.2
V
¾
155
310
mA
¾
260
420
mA
¾
150
310
mA
¾
250
420
mA
¾
8
30
mA
¾
20
60
mA
¾
¾
20
mA
¾
¾
35
mA
¾
1
12
mA
¾
2
24
mA
0
¾
0.6
V
0
¾
1.0
V
2.4
¾
3.0
V
4.0
¾
5.0
V
DATA, WR, CS, RD
5V
LCD Common Source Current
Min.
DATA, WR, CS, RD
5V
IOH3
Rev. 1.60
Ta=25°C
3V
VOL=0.3V
0.9
1.8
¾
mA
5V
VOL=0.5V
1.7
3.0
¾
mA
3V
VOH=2.7V
-0.9
-1.8
¾
mA
5V
VOH=4.5V
-1.7
-3.0
¾
mA
3V
VOL=0.3V
0.9
1.8
¾
mA
5V
VOL=0.5V
1.7
3.0
¾
mA
3V
VOH=2.7V
-0.9
-1.8
¾
mA
5V
VOH=4.5V
-1.7
-3.0
¾
mA
3V
VOL=0.3V
80
160
¾
mA
5V
VOL=0.5V
180
360
¾
mA
3V
VOH=2.7V
-40
-80
¾
mA
5V
VOH=4.5V
-90
-180
¾
mA
3V
VOL=0.3V
50
100
¾
mA
5V
VOL=0.5V
120
240
¾
mA
3V
VOH=2.7V
-30
-60
¾
mA
5V
VOH=4.5V
-70
-140
¾
mA
100
200
300
kW
50
100
150
kW
3V
DATA, WR, CS, RD
5V
6
November 9, 2010
PATENTED
HT1626
A.C. Characteristics
Symbol
Parameter
Ta=25°C
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
fSYS1
System Clock
5V
On-chip RC oscillator
24
32
40
kHz
fSYS2
System Clock
¾
External clock source
¾
32
¾
kHz
fLCD1
LCD Frame Frequency
5V
On-chip RC oscillator
48
64
80
Hz
fLCD2
External clock source
¾
64
¾
Hz
n: Number of COM
¾
n/fLCD
¾
sec
4
¾
150
kHz
4
¾
300
kHz
¾
¾
75
kHz
¾
¾
150
kHz
CS
500
600
¾
ns
Write mode
3.34
¾
125
Read mode
6.67
¾
¾
Write mode
1.67
¾
125
Read mode
3.34
¾
¾
LCD Frame Frequency
¾
tCOM
LCD Common Period
¾
fCLK1
Serial Data Clock (WR Pin)
3V
Duty cycle 50%
5V
3V
fCLK2
Serial Data Clock (RD Pin)
tCS
Serial Interface Reset Pulse Width
(Figure 3)
Duty cycle 50%
5V
¾
3V
WR, RD Input Pulse Width
(Figure 1)
tCLK
5V
ms
ms
t r, t f
Rise or Fall Time Serial Data Clock
Width (Figure 1)
¾
¾
¾
120
160
ns
tsu
Setup Time for DATA to WR, RD
Clock Width (Figure 2)
¾
¾
60
120
¾
ns
tsu1
Setup Time for CS to WR, RD
Clock Width (Figure 3)
¾
¾
500
600
¾
ns
th
Hold Time for DATA to WR, RD
Clock Width (Figure 2)
¾
¾
500
600
¾
ns
th1
Hold Time for CS to WR, RD Clock
Width (Figure 3)
¾
¾
50
100
¾
ns
1.5
2.0
2.5
kHz
3.0
4.0
5.0
kHz
20
¾
¾
ms
0.05
¾
¾
V/ms
1
¾
¾
ms
Tone Frequency (2kHz)
fTONE
5V
On-chip RC oscillator
Tone Frequency (4kHz)
tOFF
VDD OFF Times (Figure 4)
¾
VDD drop down to 0V
tSR
VDD Rising Slew Rate (Figure 4)
¾
¾
tRSTD
Delay Time after Reset (Figure 4)
¾
Note:
¾
1. If the conditions of Power-on Reset timing are not satisfied in power On/Off sequence, the internal
Power-on Reset (POR) circuit will not operate normally.
2. If the VDD drops below the minimum voltage of operating voltage spec. during operating, the conditions
of Power-on Reset timing must be satisfied also. That is, the VDD must drop to 0V and keep at 0V for
20ms (min.) before rising to the normal operating voltage.
Rev. 1.60
7
November 9, 2010
PATENTED
tf
W R , R D
C lo c k
9 0 %
5 0 %
1 0 %
tr
tC
V
tC
L K
HT1626
V A L ID D A T A
D D
D B
G N D
L K
ts
Figure 1
V
D D
5 0 %
G N D
th
u
V
W R , R D
C lo c k
5 0 %
D D
G N D
Figure 2
tC
C S
V
th
u 1
G N D
1
V
5 0 %
F IR S T
C lo c k
tS
D D
5 0 %
ts
W R , R D
C lo c k
V D D
S
0 V
tO
D D
R
0 .9 V
F F
D D
tR
S T D
G N D
L A S T
C lo c k
C S
Figure 3
Figure 4. Power-on Reset Timing
Functional Description
Display Memory - RAM Structure
If an external clock is selected as the source of system
frequency, the SYS DIS command turns out invalid and
the power down mode fails to be carried out until the external clock source is removed.
The static display RAM is organized into 192´4 bits and
stores the display data. The contents of the RAM are directly mapped to the contents of the LCD driver. Data in
the RAM can be accessed by the READ, WRITE and
READ-MODIFY-WRITE commands. The following is a mapping from
the RAM to the LCD patterns.
Buzzer Tone Output
A simple tone generator is implemented in the HT1626.
The tone generator can output a pair of differential driving signals on the BZ and BZ which are used to generate
a single tone.
Time Base and Watchdog Timer - WDT
The time base generator and WDT share the same divided (/256) counter. TIMER DIS/EN/CLR, WDT
DIS/EN/CLR and IRQ EN/DIS are independent from each
other. Once the WDT time-out occurs, the IRQ pin will
remain at logic low level until the CLR WDT or the IRQ
DIS command is issued.
C O M 1 5
C O M 1 4
C O M 1 3
Command Format
The HT1626 can be configured by the software setting.
There are two mode commands to configure the
HT1626 resource and to transfer the LCD display data.
C O M 3
C O M 1 2
C O M 2
C O M 1
C O M 0
S E G 0
3
0
S E G 1
7
4
S E G 2
1 1
8
S E G 3
1 5
1 2
S E G 4 7
1 9 1
1 8 8
D 3
D 2
D 1
D 0
A d d r
D 3
D a ta
D 2
D 1
D 0
A d d r e s s 8 B its
(A 7 , A 6 , ...., A 0 )
A d d r
D a ta
D a ta 4 B its
(D 3 , D 2 , D 1 , D 0 )
RAM Mapping
Rev. 1.60
8
November 9, 2010
PATENTED
HT1626
T im e B a s e
T IM E R
/2 5 6
C lo c k S o u r c e
V
C L R T im e r
D D
Q
D
W D T
/4
C K
C L R
IR Q
E N /D IS
W D T E N /D IS
IR Q
E N /D IS
R
W D T
Timer and WDT Configurations
The following are the data mode ID and the command
mode ID:
Mode
ID
READ
Operation
Data
110
WRITE
Data
101
READ-MODIFY-WRITE
Data
101
Command
100
COMMAND
Name
If successive commands have been issued, the command mode ID can be omitted. While the system is operating in the non-successive command or the
non-successive address data mode, the CS pin should
be set to ²1², and the previous operation mode will be
reset also. The CS pin returns to ²0², a new operation
mode ID should be issued first.
Command Code
Function
TONE OFF
0000-1000-X
Turn-off tone output
TONE 4K
010X-XXXX-X
Turn-on tone output, tone frequency is 4kHz
TONE 2K
0110-XXXX-X
Turn-on tone output, tone frequency is 2kHz
Timing Diagrams
READ Mode (Command Code : 1 1 0)
C S
W R
R D
D A T A
1
0
1
A 7
A 5
A 6
A 3
A 4
A 2
A 1
A 0
D 0
D 1
D 2
D 3
1
A 7
0
1
A 5
A 6
D a ta (M A 1 )
M e m o ry A d d re s s 1 (M A 1 )
A 4
A 3
A 2
A 1
A 0
D 0
M e m o ry A d d re s s 2 (M A 2 )
D 1
D 2
D 3
D a ta (M A 2 )
READ Mode (Successive Address Reading)
C S
W R
R D
D A T A
1
1
0
A 7
A 6
A 5
A 4
A 3
A 2
M e m o ry A d d re s s (M A )
Rev. 1.60
A 1
A 0
D 0
D 1
D 2
D a ta (M A )
9
D 3
D 0
D 1
D 2
D 3
D a ta (M A + 1 )
D 0
D 1
D 2
D a ta (M A + 2 )
D 3
D 0
D 1
D 2
D 3
D 0
D a ta (M A + 3 )
November 9, 2010
PATENTED
HT1626
WRITE Mode (Command Code : 1 0 1)
C S
W R
1
D A T A
1
0
A 7
A 5
A 6
A 3
A 4
A 2
A 1
A 0
D 0
D 2
D 1
M e m o ry A d d re s s 1 (M A 1 )
D 3
1
1
0
A 7
A 6
D a ta (M A 1 )
A 5
A 4
A 3
A 2
A 1
A 0
D 0
D 2
D 1
M e m o ry A d d re s s 2 (M A 2 )
D 3
D a ta (M A 2 )
WRITE Mode (Successive Address Writing)
C S
W R
1
D A T A
A 7
1
0
A 5
A 6
A 4
A 3
A 2
A 1
A 0
D 0
M e m o ry A d d re s s (M A )
D 2
D 1
D 3
D 0
D 1
D 2
D 3
D 0
D a ta (M A + 1 )
D a ta (M A )
D 1
D 2
D 3
D 0
D a ta (M A + 2 )
D 2
D 1
D 3
D 0
D a ta (M A + 3 )
READ-MODIFY-WRITE Mode (Command Code : 1 0 1)
C S
W R
R D
D A T A
1
1
0
A 6
A 7
A 5
A 4
A 3
A 2
A 1
A 0
D 0
M e m o ry A d d re s s 1 (M A 1 )
D 1
D 2
D 3
D 0
D 1
D 2
D 3
1
0
1
A 7
D a ta (M A 1 )
D a ta (M A 1 )
A 6
A 1
A 0
D 0
M e m o ry A d d re s s 2 (M A 2 )
D 1
D 2
D 3
D a ta (M A 2 )
READ-MODIFY-WRITE Mode (Successive Address Accessing)
C S
W R
R D
D A T A
1
0
1
A 7
A 6
A 5
A 4
A 3
A 2
A 1
M e m o ry A d d re s s (M A )
Rev. 1.60
A 0
D 0
D 1
D 2
D 3
D a ta (M A )
10
D 0
D 1
D 2
D a ta (M A )
D 3
D 0
D 1
D 2
D a ta (M A + 1 )
D 3
D 0
D 1
D 2
D a ta (M A + 1 )
D 3
D 0
D 1
D 2
D 3
D 0
D a ta (M A + 2 )
November 9, 2010
PATENTED
HT1626
Command Mode (Command Code : 1 0 0)
C S
W R
D A T A
1
0
0
C 8
C 7
C 6
C 5
C 4
C 3
C o m m a n d 1
C 2
C 1
C 8
C 0
C o m m a n d ...
C 7
C 6
C 5
C 4
C 3
C 2
C 1
C 0
C o m m a n d i
C o m m a n d
o r
D a ta M o d e
Mode (Data And Command Mode)
C S
W R
D A T A
C o m m a n d
o r
D a ta M o d e
A d d re s s a n d D a ta
C o m m a n d
o r
D a ta M o d e
A d d re s s a n d D a ta
C o m m a n d
o r
D a ta M o d e
A d d re s s a n d D a ta
R D
Rev. 1.60
11
November 9, 2010
PATENTED
HT1626
Application Circuits
C S
*
V D D
R D
*V R
W R
V L C D
D A T A
M C U
H T 1 6 2 6
*R
B Z
P ie z o
IR Q
B Z
O S C I
C lo c k O u t
O S C O
C O M 0 ~ C O M 1 5
S E G 0 ~ S E G 4 7
E x te r n a l C lo c k 1 ( 3 2 k H z )
E x te r n a l C lo c k 2 ( 3 2 k H z )
1 /5 B ia s , 1 /1 6 D u ty
O n - c h ip O S C
L C D
P a n e l
C ry s ta l
3 2 7 6 8 H z
The connection of IRQ and RD pin can be selected depending on the requirement of the MCU.
Note:
The volatage applied to VLCD pin must be equal to or lower than VDD.
Adjust VR to fit LCD display, at VDD=5V, VLCD=4V, VR=15kW±20%.
Adjust R (external pull-high resistance) to fit user¢s time base clock.
Instruction Set Summary
Name
ID
Command Code
D/C
Function
Def.
READ
1 1 0 A7A6A5A4A3A2A1A0D0D1D2D3
D
Read data from the RAM
WRITE
1 0 1 A7A6A5A4A3A2A1A0D0D1D2D3
D
Write data to the RAM
READ-MODIFY1 0 1 A7A6A5A4A3A2A1A0D0D1D2D3
WRITE
D
Read and Write data to the RAM
SYS DIS
1 0 0 0000-0000-X
C
Turn off both system oscillator and LCD
Yes
bias generator
SYS EN
1 0 0 0000-0001-X
C
Turn on system oscillator
LCD OFF
1 0 0 0000-0010-X
C
Turn off LCD display
LCD ON
1 0 0 0000-0011-X
C
Turn on LCD display
TIMER DIS
1 0 0 0000-0100-X
C
Disable time base output
Yes
WDT DIS
1 0 0 0000-0101-X
C
Disable WDT time-out flag output
Yes
TIMER EN
1 0 0 0000-0110-X
C
Enable time base output
WDT EN
1 0 0 0000-0111-X
C
Enable WDT time-out flag output
TONE OFF
1 0 0 0000-1000-X
C
Turn off tone outputs
CLR TIMER
1 0 0 0000-1101-X
C
Clear the contents of the time base
generator
CLR WDT
1 0 0 0000-1111-X
C
Clear the contents of the WDT stage
RC 32K
1 0 0 0001-10XX-X
C
System clock source, on-chip RC
oscillator
Rev. 1.60
12
Yes
Yes
Yes
November 9, 2010
PATENTED
Name
D/C
Function
EXT (XTAL) 32K 1 0 0 0001-11XX-X
C
System clock source, external 32kHz
cl o ck so u r ce o r cr yst a l o sci l l a t o r
32.768kHz
TONE 4K
1 0 0 010X-XXXX-X
C
Tone frequency output: 4kHz
TONE 2K
1 0 0 0110-XXXX-X
C
Tone frequency output: 2kHz
IRQ DIS
1 0 0 100X-0XXX-X
C
Disable IRQ output
IRQ EN
1 0 0 100X-1XXX-X
C
Enable IRQ output
F1
1 0 0 101X-0000-X
C
Time base clock output: 1Hz
The WDT time-out flag after: 4s
F2
1 0 0 101X-0001-X
C
Time base clock output: 2Hz
The WDT time-out flag after: 2s
F4
1 0 0 101X-0010-X
C
Time base clock output: 4Hz
The WDT time-out flag after: 1s
F8
1 0 0 101X-0011-X
C
Time base clock output: 8Hz
The WDT time-out flag after: 1/2s
F16
1 0 0 101X-0100-X
C
Time base clock output: 16Hz
The WDT time-out flag after: 1/4s
F32
1 0 0 101X-0101-X
C
Time base clock output: 32Hz
The WDT time-out flag after: 1/8s
F64
1 0 0 101X-0110-X
C
Time base clock output: 64Hz
The WDT time-out flag after: 1/16s
F128
1 0 0 101X-0111-X
C
Time base clock output: 128Hz
The WDT time-out flag after: 1/32s
TEST
1 0 0 1110-0000-X
C
Test mode, user don¢t use.
NORMAL
1 0 0 1110-0011-X
C
Normal mode
Note:
ID
Command Code
HT1626
Def.
Yes
Yes
Yes
X : Don¢t care
A7~A0 : RAM address
D3~D0 : RAM data
D/C : Data/Command mode
Def. : Power on reset default
All the bold forms, namely 1 1 0, 1 0 1, and 1 0 0, are mode commands. Of these, 1 0 0 indicates the command
mode ID. If successive commands have been issued, the command mode ID except for the first command will
be omitted. The source of the tone frequency and of the time base or WDT clock frequency can be derived from
an on-chip 32kHz RC oscillator, a 32.768kHz crystal oscillator, or an external 32kHz clock. Calculation of the
frequency is based on the system frequency sources as stated above. It is recommended that the host controller should initialize the HT1626 after power on reset, for power on reset may fail, which in turn leads to the malfunctioning of the HT1626.
Rev. 1.60
13
November 9, 2010
PATENTED
HT1626
Package Information
100-pin QFP (14mm´20mm) Outline Dimensions
C
H
D
8 0
G
5 1
I
5 0
8 1
F
A
B
E
3 1
1 0 0
K
=
J
1
Symbol
Dimensions in inch
Min.
Nom.
Max.
A
0.728
¾
0.756
B
0.547
¾
0.555
C
0.965
¾
0.992
D
0.783
¾
0.791
E
¾
0.026
¾
F
¾
0.012
¾
G
0.098
¾
0.122
H
¾
¾
0.134
I
¾
0.004
¾
J
0.039
¾
0.055
K
0.004
¾
0.008
a
0°
¾
7°
Symbol
Rev. 1.60
3 0
Dimensions in mm
Min.
Nom.
Max.
A
18.50
¾
19.20
B
13.90
¾
14.10
C
24.50
¾
25.20
D
19.90
¾
20.10
E
¾
0.65
¾
F
¾
0.30
¾
G
2.50
¾
3.10
H
¾
¾
3.40
I
¾
0.1
¾
J
1.00
¾
1.40
K
0.10
¾
0.20
a
0°
¾
7°
14
November 9, 2010
PATENTED
HT1626
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. (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 (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 2010 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. 1.60
15
November 9, 2010