Motorola MVME1X7P manual Tick Timer 2 Control Register

Models: MVME1X7P

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2

VMEchip2

 

 

WDCS

 

When this bit is set high, the watchdog time-out status bit

 

 

 

 

(WDTO bit in this register) is cleared.

 

 

 

 

 

SRST

 

When this bit is set high, a SYSRESET signal is generated

 

 

 

 

on the VMEbus. SYSRESET resets the VMEchip2 and

 

 

 

 

clears this bit.

 

 

 

 

 

 

 

Tick Timer 2 Control Register

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ADR/SIZ

 

 

 

$FFF40060 (8 bits [7 used] of 32)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

15

14

 

13

 

12

 

11

10

9

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NAME

 

 

OVF

 

 

 

COVF

COC

 

EN

 

 

 

 

 

 

 

 

 

 

 

 

 

OPER

 

 

R

 

 

 

C

R/W

 

R/W

 

 

 

 

 

 

 

 

 

 

 

 

 

RESET

 

 

0 PS

 

 

 

0 PS

0 PS

 

0 PS

 

 

 

 

 

 

 

 

 

 

 

 

 

EN

 

When this bit is high, the counter increments. When this

 

 

 

 

bit is low, the counter does not increment.

 

 

 

COC

 

When this bit is high, the counter is reset to 0 when it

 

 

 

 

compares with the compare register. When this bit is low,

 

 

 

 

the counter is not reset.

 

 

 

 

 

 

 

COVF

 

The overflow counter is cleared when a 1 is written to this

 

 

 

 

bit.

 

 

 

 

 

 

 

 

 

OVF

 

These bits are the output of the overflow counter. The

 

 

 

 

overflow counter is incremented each time the tick timer

 

 

 

 

sends an interrupt to the local bus interrupter. The

 

overflow counter can be cleared by writing a 1 to the COVF bit.

2-72

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Page 162
Image 162
Motorola MVME1X7P manual Tick Timer 2 Control Register