TM8705
5
tenx technology, inc.
Rev 1.3
03/12/01
PIN DESCRIPTION
Name
I/O
Description
BAK
P
Positive Back-up voltage.
At Li power mode, connect a 0.1u capacitor to GND.
VDD1,2,3
P
LCD supply voltage, and positive supply voltage.
.In Ag Mode, connect positive power to VDD1.
.In Li or ExtV power mode, connect positive power to VDD2.
RESET
I
Input pin for external reset request signal, built-in internal pull-down resistor.
INT
I
Input pin for external INT request signal.
. Falling edge or rising edge triggered is defined by mask option.
. Internal pull-down or pull-up resistor is defined by mask option.
TEST
Test signal input pin.
CUP1,2
O
Switching pins for supply the LCD driving voltage to the VDD1, 2, 3 pins.
. Connect the CUP1 and CUP2 pins with non-polarized electrolytic capacitors when
chip operated in 1/2 or 1/3 bias mode.
. In no BIAS mode application, leave these pins opened.
XIN
XOUT
I
O
Time base counter frequency (clock specified. LCD alternating frequency. Alarm signal
frequency) or system clock oscillation.
. The usage of 32KHz Crystal oscillator or external RC oscillator is defined by mask
option.
CFIN
CFOUT
I
O
System clock oscillation for FAST clock only or DUAL clock operation.
. The usage of 3.58MHz ceramic/resonator oscillator or external R type oscillator is
defined by mask option
COM1~6
O
Output pins for driving the common pins of the LCD panel.
COM5~6 could be defined as COMS or Open Drain type output.
SEG1-40
O
Output pins for driving the LCD panel segment.
IOA1-4
I/O
Input / Output port A, (muxed with SEG24~27)
IOB1-4
I/O
Input / Output port B, (muxed with SEG28~31)
IOC1-4
I/O
Input / Output port C, (muxed with SEG32~35)
IOD1~4
I/O
Input / Output port D, (muxed with SEG36~39)
CX
RR/RT/RH
I
O
1 input pin and 3 output pins for RFC application. (muxed with SEG24~27)
ELC/ELP
O
Output port for El panel driver. (muxed with SEG28~29)
BZB/BZ
O
Output port for alarm, clock or single tone melody generator. (muxed with SEG30~31)
K1~16
O
Output port for key matrix scanning.(Shared with SEG1~SEG16)
KI1~4
I
Input port for key matrix scanning.(Muxed with SEG32~SEG35)
GND
P
Negative supply voltage.
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