HD64F3048F16 Datasheet, PDF (160/903 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

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
(CS₇ to CS₄).
If a chip select signal (CS₇ to CS₄) output is selected in this register, the corresponding pin
functions as a chip select signal (CS₇ to CS₄) output, this function taking priority over other
functions. CSCR cannot be modified in single-chip mode.
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 CS_n is disabled
Output of chip select signal CS_n is enabled
(Initial value)
Bits 3 to 0—Reserved: Read-only bits, always read as 1.
Rev. 3.00 Sep 27, 2006 page 132 of 872
REJ09B0325-0300