Motorola MVME172 - Manual (Page 319)

Programming Model
http://www.mcg.mot.com/literature 5-29
5
Scrub Timer Counter (Bits 7-0)
This register reflects the current value in the Scrub Timer Counter bits 7-0.
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.
ADR/SIZ 1st $FFF43044/2nd $FFF43144 (8-bits)
BIT 31 30 29 28 27 26 25 24
NAME ST15 ST14 ST13 ST12 ST11 ST10 ST9 ST8
OPER R/W R/W R/W R/W R/W R/W R/W R/W
RESET 0 PLS 0 PLS 0 PLS 0 PLS 0 PLS 0 PLS 0 PLS 0 PLS
ADR/SIZ 1st $FFF43048/2nd $FFF43148 (8-bits)
BIT 31 30 29 28 27 26 25 24
NAME ST7 ST6 ST5 ST4 ST3 ST2 ST1 ST0
OPER R/W R/W R/W R/W R/W R/W R/W R/W
RESET 0 PLS 0 PLS 0 PLS 0 PLS 0 PLS 0 PLS 0 PLS 0 PLS