Reset Switch Control Register - Motorola MVME162FX Programmer's Reference Manual

MC2 Chip

RESET Switch Control Register

3
ADR/SIZ
BIT
NAME
OPER
RESET
3-44
The switch on the MVME162FX front panel and several
RESET
status and control bits are defined by this register.
31 30 29
R R R
0 0
RSWE The
RESET
VMEbus interfaceÕÕ option. This bit is duplicated at
the same bit position in the VMEchip2 at location
$FFF40060. When this bit is high, or the duplicate bit
in the VMEchip2 is high, the
enabled. When both bits are low, the
disabled.
When this bit is high, the MC2 chip asserts the
BDFLO
BRDFAIL signal pin. This signal is wired-or to the
VMEchip2 board fail pin. It controls the board fail
( ) LED on the MVME162FX.
FAIL
CPURS When this bit is set high, the powerup reset status bit
is cleared. This bit is always read zero.
This bit is set by a powerup reset. It is cleared by a
PURS
write to the CPURS bit.
When this status bit is high, the BRDFAIL signal pin
BRFLI
on the MC2 chip is asserted. When this status bit is
low, the BRDFAIL signal pin on the MC2 chip is not
asserted. The BRDFAIL pin may be asserted by an
external device, the BDFLO bit in this register, or a
watchdog time-out.
$FFF42044 (8 bits)
28 27
BRFLI PURS
R R
0 1 PL 1 P
switch enable bit is used with the ÔÔno
26 25 24
CPURS BDFLO RSWE
C R/W R/W
0 1 PL 1 P
switch is
RESET
switch is
RESET