Themis Computer
A-3
A. Connector Pinouts, LEDs, Switches
A.2.2
Baseboard VME P2
SCSI port A, Ethernet MII port A and alarm signals are routed to P2. Additional P2 pinout varies with the
board configuration: in PS/2 mode, either PS/2 keyboard/mouse signals or serial port B signals are available
on P2. In Sun mode, Sun keyboard/mouse signals are available on P2. Refer to Section 2.1, "Determine Board
Type and Configuration," on page 2-1. Selection between serial port B and PS/2 keyboard/mouse signals is
made by solder beads SB1801 to SB1811. Refer to Section B.3.1, "Baseboard Solder Beads," on page B-6.
P2 also contains 3 unbuffered, active low, alarm output signals:
– POWER FAIL: Asserted on Power Failure (refer to 6.1.4, "Power Management System," on page
6-3) or when VME ACFAIL is active
– HI TEMP: Asserted when Critical Temperature is reached (refer to 6.2, "Temperature Sensor," on
page 6-5)
– SW ALARM: User-defined. Asserted on a write access to address 0x1ff.f110.0000. Refer to the
USPIIi-1v Software Manual.
• Connector Type: VME32
Figure A-2.
Baseboard VME P2 Connector Orientation
Table A-2.
Baseboard VME P2 Connector in PS/2 Mode
Pin
Row A
Signal Name
Row B
Signal Name
Row C
Signal Name
1
VCC
VCC
VCC
2
MII A MDIO
GND
SCSI A P2
a
3
MII A MDC
SCSI A TERMPWR
b
SCSI A TERMPWR
4
MII A RXD3
VME A24
SCSI A ATN
5
MII A RXD2
VME A25
SCSI A BSY
6
MII A RXD1
VME A26
SCSI A ACK
7
MII A RXD0
VME A27
SCSI A RST
8
MII A RX DV
VME A28
SCSI A MSG
9
MII A RX CLK
VME A29
SCSI A SEL
10
MII A RX ER
VME A30
SCSI A CD
11
MII A TX ER
VME A31
SCSI A REQ
12
MII A TX CLK
GND
SCSI A IO
1
32
Row A
Row B
Row C
(Top View)
PCB Edge
Содержание USPIIi-1v
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Страница 105: ...Themis Computer B 5 B Jumper and Solder Bead Configurations Figure B 2 I O Board Jumper Locations...
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