1
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
2.10.1999
GENERAL DESCRIPTION
The EM32100 is a CMOS LCD display driver which can receive dialing data from dialer IC and display on
the LCD panel. The EM32100 can also display real time clock, conversation time (stopwatch).
FEATURES
• Drive 8/10 digits LCD panel.
• Display dialing number.
• Display real time clock (RTC) in 12 hour or 24 hour format selectable.
• Stopwatch function for counting conversation time up to 59 minutes 59 seconds.
• Operating voltage: 1.5 VDC ( typical )
• Operating current : 3 µA (max.)
• LCD driver method : 1/3 duty , 1/2 bias.
• Internal voltage doubler circuit for drive LCD.
• Internal dialer interface.
• Use single colck 32768Hz crystal.
• Package in QFP 48 pins or chip form .
APPLICATION FIELD
Telephone and Digital display system.
EM32100
8/10 DIGIT LCD DRIVER
PIN ASSIGNMENTS
NC
VP
VN
V
EE
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
13
14
15
16
17
18
19
20
21
22
23
24
12
11
10
9
8
7
6
5
4
3
2
1
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
NC
SEG9
SEG8
SEG7
SEG6
EM32100
48
47
46
45
44
43
42
41
40
39
38
37
25
26
27
28
29
30
31
32
33
34
35
36
NC
F32H
TESTI
TEST2
COM3
COM2
COM1
SEG1
SEG2
SEG3
SEG4
SEG5
NC
ENRTC
24/12
VSS
XOUT
NC
XIN
V
DD
HKS
SDI
MS2
MS1
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
2
2.10.1999
FUNCTION BLOCK DIAGRAM
Serial
Data
Samplin
&
Decoding
RTC/STW
Counter
COM1~3
OSC.
SEG1~24
1/3 Duty 1/2 Bias LCD Driver
Timing
&
Control
Circuit
Sampling
Signal
Generator
Power
Supply
Circuit
SDI
XIN
XOUT
VDD
VSS
VP VEE VN
F32HZ
HKS*
24/12
*
ENRTC*
MS1
MS2
TESTI*
Serial Data
Display Buffer
PIN DESCRIPTIONS
Symbol Function
MS1 RTC (Real Time Clock ) manual setting pin 1 (internal pull up resistor typ. 150kΩ,debounce
time=15.6ms)
MS2 RTC ( Real Time Clock ) manual setting pin 2 ; internal pull up resistor : idle ( On-Hook ) =
5MΩ , normal ( Off- Hook ) = 150kΩ ; at idle and normal state , debounce time=15.6ms ,
at test mode state , no debounce time )
SDI Serial data input pin ( internal pull up resistor = 5 MΩ)
HKS Hook switch status input pin. ( This pin "High",On-Hook ; "Low",Off-Hook )
VDD Power supply pin
XIN,XOUT Crystal input and output pins(crystal=32768Hz)
VSS Power supply pin
24/12 RTC display 24 or 12 hours format select pin.(This pin "high",24 hours form;"low",12
hours form,input pin)
ENRTC RTC enable or disable detect pin. ( This pin detect "high", RTC disable; "low" , RTC
enable , input pin )
VEE,VP,VN Voltage doubler circuit for LCD driver ( DC-DC frequency conversion=1024Hz )
SEG1~SEG24 LCD panel driver segment output pins
COM1~COM3 LCD panel driver common output pins ( Frame Frequency= 34.13 Hz).
TEST2 No connection , reserve for testing
TESTI Enter test mode detect pin
F32H Signal 32 Hz output for testing ,NMOS open drain structure
3
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
2.10.1999
LCD Panel Description
The relationship between ENRTC and EM32100 system LCD display method is as follows:
ON-HOOK (HKS="High") OFF-HOOK(HKS="Low")
ENRTC="High" blank dialing number
STW
ENRTC="Low" RTC dialing number
STW
RTC
SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17
COM3 9a 10f 10b 9f 9b 8f 8b 6a
COM2 8a 10e 10g 9e 9g 8e 8g 5a
COM1 10a 10d 10c 9d 9c 8d 8c 7a
SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9
COM3 7f 7b 6f 6b 5f 5b 3a 4f
COM2 7e 7g 6e 6g 5e 5g 2a 4e
COM1 7d 7c 6d 6c 5d 5c 4a 4d
SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1
COM3 4b 3f 3b 2f 2b 1f 1b AM
COM2 4g 3e 3g 2e 2g 1e 1g PM
COM1 4c 3d 3c 2d 2c 1d 1c 1a
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
4
2.10.1999
<Note>: If SEG20~23 are not used, then it can be used as an 8 digits LCD display driver.
Serial Data Interface
When the EM32100 senses the falling edge of the Start bit, it will sample subsequent bits in the middle of
each bit. The received bit will then be assembled and decoded, and corresponding pattern will be displayed
on LCD panel. The serial data format is as follows:
The frequence of every bit is 256Hz ( about 3.9 ms)
There are two categories of dialing data, and representation of serial data is as the following:
01Bit0 Bit1 Bit2 Bit3 Bit4 Bit5 01
Start bit Stop bit
Data bits
5
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
2.10.1999
(b5b4 = 00) Digit key
Key 1234567890*#PP→T
b3b2b1b0 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110
Display 1 2 34567890 P
(b5b4 = 10 ) function key
Key F
b3b2b1b0 1111
Display
Note:
1. Flash key will be treated as "clear LCD panel" command.
2. Any invalid data will be ignored by the EM32100.
FUNCTION DESCRIPTION
Dialing dispaly
The serial data received by SDI pin of EM32100 will be decoded and shown on LCD panel. Display format
is as follows:
Off-Hook state mode:
F
F
T
F
F
TF
T
F
T
F
F
T
T
T
F
F
F
T
T
T
T
F
F
T
T
T
T
F
D
ata
V
alid?
27
RTC M
o
d
e
24
6S
e
c
.
Exp
ire
?
21
D
ata
V
ali
d
?
20
D
ata
I
n?
19
6S
e
c
.E
xp
ire
?
18
HKS = 1?
17
S
tart Ti
m
er
16
D
is
p
la
y
D
iali
n
g
N
o
.
15
D
ata
V
ali
d?
14
HKS=0
13
S
tart
T
i
m
er
12
MS1 = 0?
11
D
ata i
n?
10
HKS = 1?
9
D
is
p
la
y
RTC
8
MS1 = 0
7
MS2 = 0?
6
D
ata
I
n?
5
HKS = 1?
4
STW D
is
p
la
y
3
R
eset S
TW
2
S
tart
1
T
F
MS2 = 0 ?
F
T
MS1=0?
MS2=0?
T
F
F
T
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
6
2.10.1999
RTC (Real time clock) display
12 hours format:
24 hours format:
<Note>:
12 or 24 hours format is selected by 24/12 pin. When this pin is pulled "high", then RTC is displayed in 24
hours format, otherwise RTC is displayed in 12 hours format. The AM, PM patterns will not show for RTC
display in 24 hours format.
STW (stop watch ) display
When HKS pin is high, the system work in RTC display mode .When HKS pin switches from "high" to "low",
the system enter STW display mode.STW count up from 00:00 up to 59:59. For example:
7
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
2.10.1999
Setting RTC
With the HKS pin at "high", RTC can be set up by operating MS1 and MS2 pins as described as in the following:
1.In on-Hook state, press MS1, hour digit will flash,
2.Press MS2 to count up data.
3.Press MS1 once again, move to minute digit, digit flash, and reset second.
4.Press MS2 to count up minute digit.
5.Press MS1 again to finish RTC set up.
<Note>:
1. If MS2 are pressed and hold for over 2 sec ,then data automatically count up in every 0.5 sec.
2. Digit flash time is 1 Hz (0.5 sec on, 0.5 sec off)
RTC setup Flowchart:
F
T
F
F T
F
F
F T
T
F
T
T
T
T
F
S
top
W
atch
M
ode
1
0
Minute +1
9
MS
2
=
L
o?
8
MS
1
=
L
o?
7
HKS=0?
6
Minute Flash and reset second
5
Hour +1
9
MS
2
=
L
o?
8
MS
1
=
L
o?
7
HKS=0?
6
Hour Flash
5
MS
1
=
L
o?
4
HKS=0?
3
RTC D
isplay
2
S
tart
1
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
8
2.10.1999
RTC display and STW reset at Off-hook state
1.When at On-hook state,operating MS1 and MS2 can setup RTC.
2.When at Off-hook state,operating MS1 and MS2 can display RTC and clear STW.
Describe as following table:
HKS="high" HKS="low"
MS1 Select RTC setup position Toggle display RTC/STW
MS2 Count up hour or minute data Reset STW
Testing operating
The F32HZ pin is a 32 Hertz clock source. This pin is intended to support LCD module testing in production
line in the following two ways:
1. F32HZ can be connected to MS2 pin and, by operating the MS1 pin, can be used to test RTC setting
function.
2.At off-HOOK state; In the TEST mode (the TEST pin is at "Low" level), the SDI pin sampling signal frequency
is 32 Hz. F32HZ pin can be connected to SDI pin and with each reception of SDI data of "0" key, the LCD
will display "1", "2", ..., "9", *, #, P,P→T with each digit shifted left sequentially. Then the LCD panel goes
blank, AM,PM goes on, and finally all patterns go on. And this sequence will repeat again.
F32HZ
SDI 0101010101
Start bit Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Stop bitData bits
• After entering test mode and 6 digits of "0" are received, the LCD panel is as follows:
•
Then 8 more digits of “0” are received, the LCD panel is as follows:
•
Then the LCD panel will go blank.
9
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
2.10.1999
•
Turn on “AM”indicator
•
Then turn on “PM”indicator
PM
•
Finally all patterns are turned on.
• Then the sequence will repeat all over again.
ABSOLUTE MAXIMUM RATINGS
Items Sym. Condition Rating
Supply voltage VDD - 0.5V to 1.5V
Input voltage VIN - 0.5V to VDD+0.5V
Output voltage VOExcept open-drain - 0.5V to VEE+0.5V
Open-drain -0.5 V to 3V
Output current IOOthers 3.2 mA
Power dissipation PDTOPR = 50oC 300 mW
Operating temperature TOPR 0oC to 50oC
Storage temperature T STR -55oC to 125oC
RECOMMENDED OPERATING CONDITIONS
1. Supply voltage at 1.5V D.C.
2. Operation frequency fosc : 32768 Hz.
AM
PM
AM
PM
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
10
2.10.1999
DC AND AC ELECTRICAL CHARACTERISTICS (fosc=32768 Hz,VDD =1.5V)
Parameter Sym. Condition Min. Typ. Max. Unit
Operating voltage VDD 1.2 1.5 1.8 V
VEE 2.4 3 3.6 V
Operating current (no load) IDD - 1.5 3 µA
Power on
crystal start oscillation voltage VSTART 1.3 1.5 1.8 V
Input voltage VIH VDD-0.3 - VDD V
VIL VSS -V
SS+0.3 V
Standby current (ENRTC=H) ISTBY --1µA
Input pins pull-up resistor RI- 150 - KΩ
(MS1, TestI pins)
MS2 pin input resistance RIHKS=1, VI=VSS -5-MΩ
HKS=0, VI=VSS - 150 - KΩ
SDI pin input resistance RIVIN=VSS -5-MΩ
SDI input data every bit time TBIT 3.8 3.9 4.1 mS
Oscillator frequency fosc. - 32768 - Hz
Oscillator start time TSTART VDD=1.45 - - 2 Sec.
Common/Segment pins
Source curent IOH VO=VEE-0.5V 6 - - µA
Sink current IOL VO=0.5 6 - - µA
F32HZ pin sink current ISVO=0.5V 0.2 0.5 - mA
HKS, MS1, TESTI, MS2 Tdb VO=0.5V - 15.6 - mS
(not at test mode), input pin
debouce time
11
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
2.10.1999
APPLICATION CIRCUIT
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
37
38
39
40
41
42
43
44
45
46
47
48
SEG5
SEG4
SEG3
SEG2
SEG1
COM1
COM2
COM3
TEST2
TEST1
F32H
NC
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
V
EE
VN
VP
NC
SEG6
SEG7
SEG8
SEG9
NC
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
MS1
MS2
SD1
HKS
V
DD
XIN
NC
XOUT
V
SS
24/12
ENRTC
NC
.1µ
.1µ
EM32100
V
CC
8/10 Digits LCD Pannel
1.5V
32768Hz
1µ
100k
200k
100k
20p
20p
3
1
3
1
1
1
2
2
2
3
1
2
2
2
C945
220k
220k
47kDIODE
DIODE
DIODE
C945
V
DD
HKS
HDO
HFO
V
SS
SDO
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
12
2.10.1999
PAD DIAGRAM
Pad No. Symbol X Y
1 MS1 712.8 992.2
2 MS2 561.6 992.2
3 SDI 412.2 992.2
4 HKS 261.0 992.2
5V
DD 103.5 1012.0
6 XIN -59.5 992.2
7
8 XOUT -209.8 1006.2
9V
SS -371.8 1006.2
10 24/12 -523.9 992.2
11 ENRTC -673.3 992.2
12
13
14 VP -917.2 1033.6
15 VN -917.2 884.2
16 VEE -931.2 733.3
17 SEG24 -949.2 552.1
18 SEG23 -949.2 371.7
19 SEG22 -949.2 191.3
20 SEG21 -949.2 11.0
Chip Size : 2230 x 2480 µm
1
2
3
4
5
6
8
9
10
11
14
15
16
17
18
19
20
21
22
23
24
25 26 27 28 29 30 31 33 34 35 36
37
38
39
40
41
42
43
44
45
46
47 F32H
TESTI
TEST2
COM3
COM2
COM1
SEG1
SEG2
SEG3
SEG4
SEG5
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
VP
SEG24
SEG23
VN
VEE
SEG21
SEG20
SEG19
SEG18
SEG17
SEG22
MS1
HKS
VDD
MS2
SDI
XOUT
VSS
24/12
ENRTC
XIN
(0,0)
EM32100
13
* This specification are subject to be changed without notice.
EM32100
8/10 DIGIT LCD DRIVER
2.10.1999
Pad No. Symbol X Y
21 SEG20 -949.2 -169.4
22 SEG19 -949.2 -349.7
23 SEG18 -949.2 -530.1
24 SEG17 -949.2 -710.5
25 SEG16 -895.7 -1074.2
26 SEG15 -715.3 -1074.2
27 SEG14 -535.0 -1074.2
28 SEG13 -354.6 -1074.2
29 SEG12 -174.2 -1074.2
30 SEG11 6.1 -1074.2
31 SEG10 186.5 -1074.2
32
33 SEG9 366.8 -1074.2
34 SEG8 547.2 -1074.2
35 SEG7 727.6 -1074.2
36 SEG6 907.9 -1074.2
37 SEG5 949.1 -723.1
38 SEG4 949.1 -542.7
39 SEG3 949.1 -362.3
40 SEG2 949.1 -182.0
41 SEG1 949.1 -1.6
42 COM1 917.1 237.0
43 COM2 917.1 388.2
44 COM3 917.1 539.4
45 TEST2 903.1 695.6
46 TESTI 903.1 845.0
47 F32H 903.1 996.2
48
