Chip Select Control Register (Cscr) - Renesas H8/3067 Series User Manual

Section 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
to CS
(CS ).
7 4
If output of a chip select signal is enabled by a setting in this register, the corresponding pin
functions as a chip select signal (CS
be modified in single-chip mode.
Bit
7
CS7E
Initial value 0
Read/Write : R/W
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 Description
Output of chip select signal CSn is disabled
0
Output of chip select signal CSn is enabled
1
Note: n = 7 to 4
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REJ09B0276-0400
to CS
) output regardless of any other settings. CSCR cannot
7 4
6 5
CS6E CS5E
0 0
R/W R/W
Chip select 7 to 4 enable
These bits enable or disable
chip select signal output
4 3
CS4E —
0 1
R/W —
2 1
— —
1 1
— —
Reserved bits
(Initial value)
0
—
1
—