|
SH7619 Datasheet, PDF (172/836 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7619 Series | |||
|
◁ |
Section 7 Bus State Controller (BSC)
Initial
Bit
Bit Name Value R/W Description
2

0
R
Reserved
This bit is always read as 0. The write value should
always be 0.
1
WTRC1 0
R/W Idle Cycle Number from REF Command/Self-Refreshing
0
WTRC0 0
R/W Release to ACTV/REF/MRS Command
Specify the number of minimum idle cycles in the
following cases.
⢠From the issuing of the REF command to the issuing
of the ACTV/REF/MRS command.
⢠From the self-refreshing release to the issuing of the
ACTV/REF/MRS command.
00: 2 cycles
01: 3 cycles
10: 5 cycles
11: 8 cycles
PCMCIA:
⢠CS5BWCR, CS6BWCR
Initial
Bit
Bit Name Value R/W
31 to 22 
All 0 R
21
SA1
0
R/W
20
SA0
0
R/W
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
Space Attribute Specification
Specify memory card interface or I/O card interface when
the PCMCIA interface is selected.
⢠SA1
0: Specifies memory card interface when A25 = 1
1: Specifies I/O card interface when A25 = 1
⢠SA0
0: Specifies memory card interface when A25 = 0
1: Specifies I/O card interface when A25 = 0
Rev. 5.00 Mar. 15, 2007 Page 134 of 794
REJ09B0237-0500
|
▷ |