I/O Control Register 1 - Motorola MVME162FX Programmer's Reference Manual

I/O Control Register 1

ADR/SIZ
BIT 23
MIEN
NAME
OPER R/W
RESET 0 PSL
This register is a general purpose I/O control register.
Bits 16-19 control the direction of the four General Purpose I/O pins
(GPIO0-3).
Note
GPOEN0
GPOEN1
GPOEN2
GPOEN3
ABRTL
ACFL
SYSFL
MIEN
$FFF40088 (8 bits of 32)
22 21 20
SYSFL ACFL ABRTL
R R
X X
The General Purpose I/O pins are not used on the
MVME162FX.
Not used on MVME162FX
Not used on MVME162FX
Not used on MVME162FX
Not used on MVME162FX
Not used on MVME162FX
This bit indicates the status of the ACFAIL signal
line on the VMEbus. When this bit is high, the
ACFAIL signal line is active. When this bit is low,
the ACFAIL signal line is not active.
This bit indicates the status of the SYSFAIL signal
line on the VMEbus. When this bit is high, the
SYSFAIL signal line is active. When this bit is low,
the SYSFAIL signal line is not active.
When this bit is low, all interrupts controlled by the
VMEchip2 are masked. When this bit is high, all
interrupts controlled by the VMEchip2 are not
masked.
LCSR Programming Model
19 18
GPOEN3 GPOEN2 GPOEN1 GPOEN0
R R/W R/W
X 0 PS 0 PS
17 16
R/W R/W
0 PS 0 PS
2-99
2