Scrub Timer Counter (Bits 7-0); Scrub Address Counter (Bits 26-24) - Motorola MVME172 Programmer's Reference Manual

ADR/SIZ
BIT
31
NAME
ST15
OPER R/W
RESET
0 PLS

Scrub Timer Counter (Bits 7-0)

This register reflects the current value in the Scrub Timer Counter bits 7-0.
ADR/SIZ
BIT
31
NAME ST7
OPER
R/W
RESET
0 PLS

Scrub Address Counter (Bits 26-24)

This read/write register is the Scrub Address Counter. Each time the
scrubber performs a scrub memory cycle, the Scrub Address Counter
increments. For an entire scrub, the Scrub Address Counter starts at 0 and
increments until it reaches the DRAM size that is indicated by the
MEMSIZ pins. Writes to this address update the Scrub Address Counter;
reads to this address yield the value in the Scrub Address Counter. The
ability to read and write this counter is provided for test purposes. Note that
if scrubbing is in process, the Scrub Time On/Time Off Register should be
set for the minimum time on and the maximum time off during any writes
to this register. This register reflects the current value in the Scrub Address
Counter bits 26-24.
http://www.mcg.mot.com/literature
1st $FFF43044/2nd $FFF43144 (8-bits)
30 29 28
ST14 ST13 ST12
R/W R/W R/W
0 PLS 0 PLS 0 PLS
1st $FFF43048/2nd $FFF43148 (8-bits)
30 29 28
ST6 ST5 ST4
R/W R/W R/W
0 PLS 0 PLS 0 PLS
Programming Model
27 26 25
ST11 ST10 ST9
R/W R/W R/W
0 PLS 0 PLS 0 PLS
27 26 25
ST3 ST2 ST1
R/W R/W R/W
0 PLS 0 PLS 0 PLS
24
ST8
R/W
0 PLS
5
24
ST0
R/W
0 PLS
5-29