Specifications

Wireless CPU
®
Q24 Series
Interfaces
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WM_PRJ_Q24NG_PTS_001-004
January 16, 2007
3.7 Auxiliary Serial Link (UART2)
For specific applications, an auxiliary serial interface (UART2) is available on the
Wireless CPU
®
Q24 Series.
E.g. Bluetooth connectivity: See AT commands interface guide (Bluetooth)
[5].
Figure 5: UART2 Serial Link signals
Pin description
Signal Pin I/O I/O type Reset state Description
Multiplexed
with
CT103 /
TXD2
18 I CMOS (C4)
Pull down to
0V
Transmit serial
data
GPI
CT104 /
RXD2
20 O
CMOS 1X
(C3)
2V8
Receive serial
data
GPO2
CT106 /
CTS2
24 O
CMOS 2X
(C1)
High
impedance
Clear To Send GPIO0
CT105 /
RTS2
35 I CMOS
High
impedance
Request To Send GPIO5
(C1), (C3) and (C4): To obtain more details on I/O type, refer to section 4.2 "I/O Circuit diagram"
3.8 SIM Interface
3.8.1 General Description
The following five signals are available:
• SIM_VCC: SIM power supply.
• SIM_RST: Reset.
• SIM_CLK: Clock.
• SIM_DATA: I/O port.
• SIM_PRES: SIM Card detection.
The SIM interface controls a 3V / 1V8 SIM (and a 5V SIM through an external SIM
driver). This interface is fully compliant with the GSM 11.12 recommendations
concerning SIM functions.