HD6413008VF25 Datasheet, PDF (160/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

6. Bus Controller
6.2.6 Chip Select Control Register (CSCR)
CSCR is an 8-bit readable/writable register that enables or disables output of chip select signals
(CS₇ to CS₄).
If
output
of
a
chip
select
signal
CS
7
to
CS
4
is
enabled
by
a
setting
in
this
register,
the
corresponding pin functions a chip select signal (CS₇ to CS₄) output regardless of any other
settings.
Bit
7
6
5
4
3
2
1
0
CS7E
CS6E
CS5E
CS4E
⎯
⎯
⎯
⎯
Initial value
0
0
0
0
1
1
1
1
Read/Write R/W
R/W
R/W
R/W
⎯
⎯
⎯
⎯
Chip select 7 to 4 enable
These bits enable or disable
chip select signal output
Reserved bits
CSCR is initialized to H'0F by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Bits 7 to 4—Chip Select 7 to 4 Enable (CS7E to CS4E): These bits enable or disable output of
the corresponding chip select signal.
Bit n
CSnE
0
1
Note: n = 7 to 4
Description
Output of chip select signal CSn is disabled
Output of chip select signal CSn is enabled
(Initial value)
Bits 3 to 0—Reserved: These bits cannot be modified and are always read as 1.
Rev.4.00 Aug. 20, 2007 Page 114 of 638
REJ09B0395-0400