Microhard Systems IP-921 Operating Manual page 27

3.0 Hardware Features
© Microhard Systems Inc.
Pin Name No.
Vcc 1,3 Positive supply voltage for the module (9-30
VRF 2 Voltage Output (4.5VDC)
!CONFIG 4 Active low input signal to put the module into
GND 5,7 Ground reference for logic, radio and I/O pins.
+3V3 FPGA 6 Voltage Output ON during sleep mode.
+3V3 8 Voltage Output OFF during sleep mode.
NC 9-18 *Reserved for factory use.*
TXD0 19 Data Port. Transmit Data. Logic Level Output
NC 20-21 *Reserved for future use.*
CTS1 22 Diagnostics Port. Clear To Send. Active low
CTS0 23 Data Port. Clear To Send. Active low output.
RTS1 24 Diagnostics Port. Request To Send. Active low
RTS0 25 Data Port. Request To Send. Active low input.
TXD1 26 Diagnostics Port. Transmit Data. Logic level
RXD1 27 Diagnostics Port. Receive Data. Logic level
DCD0 28 Data Port.
DTR0 29 Data Port. Data Terminal Ready. Active low
DSR0 30 Data Port. Data Set Ready. Active low output.
GND 31-32 Ground reference for logic, radio, and I/O pins
CONFIDENTIAL
Description
VDC)
FLASH FILE SYSTEM RECOVERY mode.
(3.3VDC)
(3.3VDC)
from the modem.
output.
input.
output from modem.
input into the modem.
Data Carrier Detect. Active low
output.
input.
Table 3E: SIP921 Pin-Out Description
IP9xx Series
In/
Out
I
O
I
O
O
O
O
O
I
I
O
I
O
I
O
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