Sony Ericsson GR47/GR48 Manuale Utente
5. SYSTEM CONNECTOR INTERFACE
36
LZT 123 7589 R1A
5.9 Serial Data Interfaces
The serial channels, consisting of three UARTs, are asynchronous
communication links to the application or accessory units.
communication links to the application or accessory units.
• UART1 has RS-232 functionality and is used for all on- and off -line
communication.
• UART2 behaves as a general-purpose serial data link. For example, it
can be used for GPS, downloading software and receiving logging
information.
information.
• UART3 behaves as a general-purpose serial data link. It can be used by
an embedded application.
Typical Rise/Fall times
Rise Time
Fall Time
Unit
PCMCLK
19
18
ns
PCMSYN
19
15
ns
PCMOUT
900
900
ns
PCMDLD
20
19
ns
Pin
Signal
Dir
Description
RS232
CCITT Nº
41
TD
I
Serial data to radio device (UART1)
103
42
RD
O
Serial data from radio device (UART1)
104
39
RTS
IO9
I
I/O
Request To Send (UART1)
General purpose input/output 9
105
40
CTS
KeyCOL4
O4
O
O
O
Clear To Send (UART1)
Key column 4
General purpose output 4
106
37
DTR
KeyROW1
IN1
I
I
Data Terminal Ready (UART1)
Keyboard row 1
General purpose input 1
108.2
32
DSR
KeyCOL3
O3
O
O
O
Data Set Ready (UART)
Key column 3
General purpose output 3
107
38
DCD
KeyCOL 1
O1
O
O
O
Data Carrier Detect (UART1)
Key column 1
General purpose output 1
109
36
RI
KeyCOL 2
O2
O
O
O
Ring Indicator (UART1)
Key Column 2
General output 2
125
45
TD2
I
Transmitted Data (UART2)
46
RD2
O
Received Data (UART2)
43
TD3
I
Transmitted Data (UART3)
44
RD3
O
Received Data (UART3)