Motorola MVME172 - Manual (Page 314)

5-24 Computer Group Literature Center Web Site
MCECC
5
HITDIS This bit controls a function that is not currently used in the
MCECC.
RADATA This bit controls a function that is not currently used in the
MCECC.
RACODE This bit controls a function that is not currently used in the
MCECC.
Scrub Period Register Bits 15-8
The Scrub Period Control Register controls how often a scrub of the entire
memory is performed if the SCRBEN bit is set in the Scrub Control
Register. The time between scrubs is approximately two seconds times the
value programmed into the Scrub Period Register. The scrub period can be
programmed from once every four seconds to once every 36 hours. This
register contains bits 15-8 of the Scrub Period Register.
Scrub Period Register Bits 7-0
This register contains bits 7-0 of the Scrub Period Register.
ADR/SIZ 1st $FFF43028/2nd $FFF43128 (8-bits)
BIT 31 30 29 28 27 26 25 24
NAME SBPD15 SBPD14 SBPD13 SBPD12 SBPD11 SBPD10 SBPD9 SBPD8
OPER R/W R/W R/W R/W R/W R/W R/W R/W
RESET 1 PLS 1 PLS 1 PLS 1 PLS 1 PLS 1 PLS 1 PLS 1 PLS
ADR/SIZ 1st $FFF4302C/2nd $FFF4312C (8-bits)
BIT 31 30 29 28 27 26 25 24
NAME SBPD7 SBPD67 SBPD5 SBPD4 SBPD3 SBPD2 SBPD1 SBPD0
OPER R/W R/W R/W R/W R/W R/W R/W R/W
RESET 1 PLS 1 PLS 1 PLS 1 PLS 1 PLS 1 PLS 1 PLS 1 PLS