EM32117
16DIGITLCDDRIVERWITHCHECKTIMEFUNCTION
FUNCTION BLOCK DIAGRAM
SEG0~31
COM0~3
GF
1/4 Duty 1/3 bias LCD Driver
Serial Data
Sampling
&
Serial Data
Display Buffer
RTC/STW
Counter
SD1
Decoding
Sampling
Signal
Generator
ENCLND
ENRTC
24/12
HKS
MS2
XIN
XOUT
Timing
&
Control
Circuit
OSC
MS1
Power
Supply
Circuit
VDD
VSS
TEST
PIN DESCRIPTION
Pin Name
SPARE1, SPARE2
COM0~COM3
SEG0~SEG31
TEST
Description
Need to be connected to VSS.
LCD panel driver common output pins.
LCD panel driver segment output pins.
Reserved for testing, should be left open.
MS1
Manual setting and check last conversation time input pin 1, with built-in pull-up optimal
resistor. The optimal resistor before keying=100kΩ, after keying change to 1MΩ for
reducing power consumption.
MS2
Manual setting input pin 2 with built-in pull-up; optimal resistor. The
optimal resistor before keying=100kΩ, after keying change to 1MΩ for reducing power
consumption.
SDI
HKS
VDD, VSS
V2, V3
Serial data input pin with built-in 150 KΩ pull-up resistor.
Hook switch status input pin with built-in 1 MΩ pull-up resistor.
Positive power supply pin.
Voltage tripler circuit for LCD driver.
VC1, VC2
XIN, XOUT
Voltage tripler circuit for LCD driver.
Crystal input and output pins for connecting a 32768Hz crystal (Internal built-in 2-p
capacitor).
24/12
RTC display 24 or 12 hours format selection pin (when this pin is pulled "high, RTC will
be displayed in 24 hour format. Otherwise will be display in 12 hour format).
Calendar enable pin. When disabled (ENCLND* = high), the Calendar field of LCD
panel will be blanked. When 12 digit LCD panels are used, Calendar should be disable
to suppress output of calendar.
ENCLND
ENRTC
GF
RTC enable pin. When disabled (ENRTC* = high), the LCD panel will be blanked when
HKS pin is at high level.
General Flag input pin without built-in resistor. When GF pull "High" LCD panel will
display Icon. GF pull "Low", "GF" Icon will blank.
* This specification are subject to be changed without notice.
3.17.1999
2
ELAN [ ELAN MICROELECTRONICS CORP ]
