Benefon TGP-65-EU iO, Service Manual

Page: 31 / 62

15.1.1999
4a1800gb 5
Product: TGP-60-EU (Vega) / OA1800
controls. DSP includes two separate digital signal processors, fullrate speech cod-
ing, channel coding, data decryption and chiper key generation according to A52
algorithm.
CPU is 16 bit processor with a 2 megabyte memory address space. From this
address space a RAM circuit uses 128*8 kbits and flash PROM uses 1*8 Mbits.
HIGOLD uses a 13 MHz external clock derived from radio module TCXO. The inter-
nal clock can be run on either 6.5, 13 or 26 MHz.
Keypad is a 4*5 matrix and connected directly to HIGOLD IO pins. The display is a
graphical 32*95 pixel matrix including 23 symbols.
PIC processor (PIC16C620) takes care of Real Time Clock and has a protected
memory where IMEI information is stored. PIC has its own 32 kHz oscillator and it
runs independently and continuously (back up battery).
SIM card 3/5 V conversion IC. Since the logig runs on 3 V and the SIM card on 5 V
the LTC1555 takes care of the conversion.
Baseband power supply is a LTC1433 step down DC/DC converter.
5.3.2 Connectors
Base connector pin specification:
N Name Function State In/Out
1 V_Charge Charge voltage for battery Max 8V 1.3A In
2 V_Charge Charge voltage for battery Max 8V 1.3A In
3 V_BAT Battery voltage 4.0-7.5V Out
4 V_PROG Flash programming voltage 12V In
5 EXTMIC
+PWR External MIC signal
Power on/off control 250 mVrms
GND active In
6 GND Ground
7 GND Ground
8 EXTERP
+HOOK External loudspeaker line
+Hook identify 103V
GND active Out
+In
9 AUXDET Accessory identify for audio 0/3 V digital In
10 I2CINT/
RXD0 Incoming RS323 data 0/3 V digital In
11 TXD0/SCL Outgoing RS323 data/I2C clock 0/3 V digital Out
12 SDA/EXIO General purpose IO/I2C data 0/3 V digital In/Out
13 TXD1 Outgoing RS323 data 0/3 V digital Out
14 RXD1 Incoming RS323 data 0/3 V digital In
15 EXTIO Headset identify IO 0/3 V digital In
16 CHGCONT Charger control 0..3V DC Out