ELAN EM32100 Datasheet
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 .
EM32100
EM32100
8/10 DIGIT LCD DRIVER
8/10 DIGIT LCD DRIVER
APPLICATION FIELD
Telephone and Digital display system.
PIN ASSIGNMENTS
V
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
NC
VP
VN
NC
ENRTC
24/12
121110
13
14
15
EE
16
17
18
19
20
21
22
23
24
2526272829303132333435
SEG16
SEG15
SEG14
VSS
XOUTNCXIN
VDDHKS
SDI
987654321
EM32100
NC
SEG9
SEG10
SEG8
SEG13
SEG12
SEG11
MS2
SEG7
MS1
48
47
46
45
44
43
42
41
40
39
38
37
36
SEG6
NC
F32H
TESTI
TEST2
COM3
COM2
COM1
SEG1
SEG2
SEG3
SEG4
SEG5
* This specification are subject to be changed without notice.
2.10.1999
1
FUNCTION BLOCK DIAGRAM
EM32100
8/10 DIGIT LCD DRIVER
SDI
XIN
XOUT
VDD
VSS
COM1~3
1/3 Duty 1/2 Bias LCD Driver
Serial
Data
Samplin
Decoding
Sampling
Signal
Generator
OSC.
Power
Supply
Circuit
VP
VEE
&
VN
Serial
Display
SEG1~24
Data
Buffer
RTC/STW
Counter
Timing
&
Control
Circuit
ENRTC*
24/12
HKS*
*
MS2
MS1
F32HZ
TESTI*
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 )
V
DD
XIN,XOUT Crystal input and output pins(crystal=32768Hz)
V
SS
24/12 RTC display 24 or 12 hours format select pin.(This pin "high",24 hours form;"low",12
ENRTC RTC enable or disable detect pin. ( This pin detect "high", RTC disable; "low" , RTC
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
Power supply pin
Power supply pin
hours form,input pin)
enable , input pin )
* This specification are subject to be changed without notice.
2.10.1999
2
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
LCD Panel Description
EM32100
8/10 DIGIT LCD DRIVER
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.
2.10.1999
3
EM32100
8/10 DIGIT LCD DRIVER
<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:
0
Start bit
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:
* This specification are subject to be changed without notice.
1
Bit0
Bit1
Bit2
Data bits
Bit3
Bit4 Bit5
0
Stop bit
1
2.10.1999
4
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