TECHNICAL DESCRIPTION
Issue 1
Section 4
PMCD030901C8
Revision 0
– 16 –
Service Manual
4.4.6.
Infrared Transceiver
The Infrared transceiver is a 115 kbits/s IrDA transceiver with a transmission range of approximately 20 cm. The transceiver is
connected directly to via RX, TX and shutdown (SD) data lines.
4.5.
4.5.1
Introduction
contains the DSP, CPU, GSM timing and peripheral functions. The software for DSP is contained in masked
ROM.
4.5.2.
Subscriber Identity Module (SIM)
The SIM interface is designed to support 3 V SIMs.
4.5.3
TPU
The TPU provides the GSM TPU TDMA timing requirements for the system.
The TPU parallel outputs are as follows:
The timed serial port is used to control the SYREN device and the PLL of the RF section. It can be controlled either by the
CPU or by the TPU. The serial ports are as follows:
The MCU controls the TPU through a double-page memory buffer, the TPU Communication buffer. Only one page is
accessible by the MCU at any time. Page selection is handled by TPU. The size of each page is 256 x 16.
TPU Timing output signal assignments of
Name
Ball No.
Function
Connection
Configuration
TSPACT 0
V10
PAON
External
TSPACT 1
V11
PLLON
RF
TSPACT 2
V12
N/C
TSPACT 3
R12
TX_ON1
RF
TSPACT 4
P12
N/C
TSPACT 5
W13
N/C
TSPACT 6
AA13
DCS_PAON
RF
TSPACT 7
V13
GSM_PAON
RF
TSPACT 8
V14
N/C
TSPACT 9
R13
N/C
TSPACT 10
P13
N/C
TSPACT 11
W15
N/C
Timing serial port assignments of
Name
Ball No.
Function
Connection
Configuration
TSPEN 0
V15
nTSPEN
SYREN
TSPEN 1
Y17
N/C
TSPEN 2
AA17
PLL_STRB
RF
TSPEN 3
V16
N/C
N/A
TSPEN 4
W17
N/C
TSPCLKX
V14
PLL_CLK
RF
TSPDI
Y16
N/C
TSPDO
W16
PLL_SD/TDR
RF
