Motorola CPCI-9120, Reference Manual

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Interrupt Status Register-3
Address: C700 000E
Type: Read Only
This register provides Interrupt status. When interrupted, the NPU can interrogate the three
Interrupt status registers to determine the interrupt-source.
I2C MUX Reset Register
Address: C700 000F
Type: Write Only
This register provides a means of resetting the 4-channel I2C switch, PCA9546. An active-
LOW reset input allows the PCA9546 to recover from a situation where one of the down-
stream I2C buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C state
machine and causes all the channels to be deselected, as does the internal power-on reset func-
tion.
3
RFU
2
RFU
1
RFU
0
RFU
Table 32:
Interrupt Status Register-2
Bit Description Access
Table 33:
Interrupt Status Register-
3
Bit Description Access
3 0: Ejector handles are open
1: Ejector handles are closed. RO
2 0: Voltage Monitor Interrupt is active
1: Voltage Monitor Interrupt is inactive RO
1 0: Watchdog Timer Interrupt is active
1: Watchdog Timer Interrupt is inactive RO
0 RFU
Table 34:
I2C MUX Reset Register
Bit Description Access
0 In order to reset the I2C MUX, this must be zero.
Reset value: 1 WO