Sony Ericsson GR47/GR48 - Manual (Page 40)

5. SYSTEM CONNECTOR INTERFACE
40
LZT 123 7589 R1A
5.9.5 UART3 - TD3, RD3
UART3 is a full duplex serial communication port with transmission and
reception lines. It has the same timing and electrical signal characteristics
as UART1, TD and RD.
Transmitted Data 3 (TD3)
TD3 is used by your application to send data to the radio device via
UART3.
Received Data 3 (RD3)
RD3 is used to send data to your application via UART3.
5.10 SIM Card Related Signals
These connections allow you to communicate with the SIM card holder in
your application.
1RWH
The distance between the SIM card holder and the radio device can be up
to 25cm.
This SIM interface allows the use of 3 V and 5 V SIM cards. By default it
works on 3 V levels but will automatically switch to 5 V, if a 5 V SIM card
is fitted.
SIM voltage levels, as shown in the following table, are dependent on the
type of SIM card detected by the radio device.
Pin Signal Dir Description
15 SIMVCC - SIM card power supply
16 SIMPRESENCE I SIM card presence
17 SIMRST O SIM card reset
19 SIMCLK O SIM card clock
18 SIMDATA I/O SIM card data
Signal Parameter Mode Min. Typ. Max. Unit
SIMVCC SIM supply voltage 3 V 2.7 3.0 3.3 V
5 V 4.5 5.0 5.5 V
SIMDAT High Level Input
voltage (V
,+
)
3 V 2.1 3.0 V
5 V 3.5 5.0 V
SIMDAT Low Level Input
voltage (V
,/
)
3 V 0 0.9 V
5 V 0 1.5 V