User guide

UC864-E/G/WD/WDU Hardware User Guide
1vv0300766a Rev.4
- 03/02/09
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 13 of 78
Pin Signal I/O Function
Internal
Pull up
Type
UC864-
E/G/WD/
WDU
21
SIMIN I External SIM signal - Presence (active low) 1.8 / 3V
22
SIMCLK O External SIM signal – Clock 1.8 / 3V
Trace
23
RX_TRACE I RX Data for debug monitor
CMOS
2.6V
24
TX_TRACE O TX Data for debug monitor
CMOS
2.6V
Prog. / Data + Hw Flow Control
25
C103/TXD I Serial data input (TXD) from DTE
CMOS
2.6V
26
C104/RXD O Serial data output to DTE
CMOS
2.6V
27
C107/DSR O Output for Data set ready signal (DSR) to DTE
CMOS
2.6V
28
C106/CTS O Output for Clear to send signal (CTS) to DTE
CMOS
2.6V
29
C108/DTR I
Input for Data terminal ready signal (DTR) from
DTE
CMOS
2.6V
30
C125/RING O Output for Ring indicator signal (RI) to DTE
CMOS
2.6V
31
C105/RTS I
Input for Request to send signal (RTS) from
DTE
CMOS
2.6V
32
C109/DCD O
Output for Data carrier detect signal (DCD) to
DTE
CMOS
2.6V
Miscellaneous Functions
35
USB_ID AI
Analog input used to sense whether a
peripheral device is connected, and
determine the peripheral type, a host
or a peripheral
Analog
36
PCM_CLOCK I/O PCM clock out
CMOS
2.6V
DAC and ADC
37
ADC_IN1 AI Analog/Digital converter input A/D
38
ADC_IN2 AI Analog/Digital converter input A/D
39
ADC_IN3 AI Analog/Digital converter input A/D
40
DAC_OUT AO Digital/Analog converter output D/A
Miscellaneous Functions
45
STAT_LED O Status indicator led
CMOS
1.8V
46
GND - Ground Ground