Benefon EXION TDP80DN, Service Manual

Page: 35 / 63

9.2.2001
4Z2700GB.fm 8
Product: TDP80DN / OC2720 Processor/Audio/RF
5.2.2.2 Battery connector, V50
5.2.2.3 Battery identification connector, V51
5.2.2.4 Display connector, V80
5.2.2.5 Keyboard connector, V52
Keypad matrix inputs normally low state, when key pressed 17.5 kHz square wave is
seen also in corresponding key input port.
1 VB
3 – 5 V DC
2 GND ground
1
SBAT_ID0 Battery temperature, pulled at VCCS
2
SBAT_ID1 Detect different battery packs, pulled at VCCS
1 VRAM 2.5 V
2 GND 0 V
3 GND 0 V
4 GND 0 V
5 VRAM 2.5 V
6 SI Serial data input
7 SCL Serial clock 0 / 2.8 V pulses
8 NC Not connected
9 NC Not connected
10 NC Not connected
11 NC Not connected
12 NC Not connected
13 NC Not connected
14 NC Not connected
15 NC Not connected
16 A0 Control data / Display data
17
X_LOGRST Reset, 0 V reset active, normally 2.8 V
18
CS1 Display chip select
1 Keyin 00 Keypad matrix input
2 Keyin 01 Keypad matrix input
3 Keyin 02 Keypad matrix input
4 Keyin 03 Keypad matrix input
5 Keyin 04 Keypad matrix input
6 Keyout 00 Keypad matrix output, 17.5 kHz square
7 Keyout 01 Keypad matrix output, 17.5 kHz square
8 Keyout 02 Keypad matrix output, 17.5 kHz square
9 Keyout 03 Keypad matrix output, 17.5 kHz square
10 PWRKEY Normally high (VB), grounded when key pressed