Configuration Register 2 - Offset 0X0000000A; Control Register 1 - Offset 0X0000000C; Table 3-15 Configuration Register 2; Table 3-16 Control Register 1 - GE IMP2B Hardware Reference Manual

3.15.7 Configuration Register 2 – Offset 0x0000000A

Table 3-15 Configuration Register 2

Bits
0
1
2
3
4
5
15 to 6
Software can use bit 5 to detect whether the IMP2B is built for System Controller or 'Peripheral only'/'Limited Host, Full
a.
PMC User I/O' mode.
3.15.8 Control Register 1 – Offset 0x0000000C

Table 3-16 Control Register 1

Bits Mode Description
0 Read/Write I C EEPROM write protection
2
1 Read/Write COM1 Transceiver Driver Skew Control A
2 Read/Write COM1 Transceiver Driver Skew Control B
3 Reserved
4 Read/Write cPCI Arbiter Mode
5 Read/Write Ethernet PHY0 COMA Mode
6 Read/Write Ethernet PHY2 COMA Mode
7 Read/Write Ethernet PHY0 Reset
8 Read/Write Ethernet PHY2 Reset
9 Read/Write USB 2.0 Port 0 Power enable (drives PWREN_AA)
10 Read/Write USB 2.0 Port 1 Power enable (drives PWREN_AB)
12 & 11 Reserved
13 Read/Write GPIO External Buffer Enable
14 Read/Write Disco5, Timer/Counter 2 to Timer/Counter 3 cascade
15 Read/Write cPCI Interrupt Monitoring
Publication No. IMP2B-0HH/5
Mode Description
Read only PMC fitted
Read/Write Ethernet channel 0 configuration
Read only Ethernet channel 1 configuration
Read only COM1 configuration
Read only COM2 configuration
Read only PMC I/O configuration
Reserved
Notes
0 = PMC not fitted
1 = PMC fitted
0 = ETH1 10/100/1000BaseT [Gigabit]
1 = ETH1 10/100BaseT (default)
[Can only be modified when both PHYs are in Reset]
0 = ETH2 10/100BaseT (default)
1 = ETH2 unavailable
0 = RS422 Termination fitted
1 = RS422 Termination not fitted
0 = PMC User I/O 1 to 49 configured
a
1 = PMC User I/O 1 to 64 configured
Notes
0 = I C EEPROM writable
2
1 = I C EEPROM write protected (default)
2
[requires the NVRAM Write Enable Link (P5 3-4)
to write a '0'].
0 = COM1_SPA low (default)
1 = COM1_SPA high
0 = COM1_SPB low (default)
1 = COM1_SPB high
0 = Fixed Priority
1 = 'Round Robin' (default)
0 = PHY in normal mode (default)
1 = PHY in COMA mode
A 10ms reset is required once COMA mode is exited
0 = PHY in reset (default)
1 = PHY out of reset
0 = USB Power Off (default)
1 = USB Power On
0 = Buffer enabled
1 = Buffer disabled (default)
0 = MPP(22) tri-state (default)
1 = MPP(17) drives MPP(22)
0 = Interrupt monitoring enabled (default if host)
1 = Interrupt monitoring disabled
to be fitted
Functional Description 31