User's Manual

PMAC2 PCI Lite Hardware Reference Manual – Preliminary Documentation
24 Base Board Connector Pinouts
J5 (JRS232) Serial Port Connector
Pin # Symbol Function Description Notes
1 PHASE Output Phasing clock
2 DTR Bidirect Data terminal ready Tied to DSR
DSR TXD/ Input Receive data Host transmit data
4 CTS Input Clear to send Host ready bit
5 RXD/ Output Send data Host receives data
6 RTS Output Req. to send PMAC ready bit
7 DSR Bidirect Data set ready Tied to DTR
8 SERVO Output Servo clock
9 GND Common PMAC common
10 +5V Output +5Vdc supply Power supply out
The JRS232 connector provides the PMAC2-PC with the ability to communicate serially with an RS232
port. This connector cannot be used for daisy-chain interconnection of multiple PMACs. The J5A RS-
422 port must be used for daisy chaining.
E17 and E18 must connect pins 1 and 2 to use the RS-232 port for serial communications.
J5A (RS422) Serial Port Connector
JRS422 (26-PIN Connector)
Front View
Pin # Symbol Function Description Notes
1 CHASSI Common PMAC common
2 S+5V Output +5Vdc supply
3 RD- Input Receive data Diff. I/O low true
4 RD+ Input Receive data Diff. I/O high true
5 SD- Output Send data Diff. I/O low true
6 SD+ Output Send data Diff. I/O high true
7 CS+ Input Clear to send Diff I/O high true
8 CS- Input Clear to send Diff. I/O low true
9 RS+ Output Req. to send Diff. I/O high true
10 RS- Output Req. to send Diff I/O low true
11 DTR Bidirect Data term read Tied to DSR
12 INIT/ Input PMAC reset Low is "reset"
13 GND Common PMAC common
14 DSR Bidirect Data set ready Tied to DTR
15 SDIO- Bidirect Special data Diff. I/O low true
16 SDIO+ Bidirect Special data Diff. I/O high true
17 SCIO- Bidirect Special ctrl. Diff I/O low true
18 SCIO+ Bidirect Special ctrl. Diff. I/O high true
19 SCK- Bidirect Special clock Diff. I/O low true
20 SCK+ Bidirect Special clock Diff. I/O high true
21 SERVO- Bidirect Servo clock Diff. I/O low true
22 SERVO+ Bidirect Servo clock Diff. I/O high true
23 PHASE- Bidirect Phase clock Diff. I/O low true
24 PHASE+ Bidirect Phase clock Diff. I/O high true
25 GND Common PMAC common
26 +5V Output +5Vdc supply Power supply out
E17 and E18 must connect pins 2 and 3 to use the RS-422 port for serial communications. This connector
could be also used to daisychain interconnect multiple PMACs for synchronized operation.