HD6417034 Datasheet, PDF (475/691 Pages) Renesas Technology Corp – SuperH RISC ENGINE SH7032 AND SH7034

15.3.5 Column Address Strobe Pin Control Register (CASCR)
CASCR is a 16-bit read/write register that allows selection between column address strobe and
chip select pin functions. CASCR is initialized to H'5FFF by a power-on reset, but is not
initialized by a manual reset, or in standby mode or sleep mode.
Bit: 15
14
13
12
11
10
9
8
Bit name: CASH CASH CASL CASL —
—
—
—
MD1 MD0 MD1 MD0
Initial value: 0
1
0
1
1
1
1
1
R/W: R/W R/W R/W R/W
—
—
—
—
Bit: 7
6
5
4
3
2
1
0
Bit name: —
—
—
—
—
—
—
—
Initial value: 1
1
1
1
1
1
1
1
R/W: —
—
—
—
—
—
—
—
• Bits 15 and 14 (CASH Mode (CASHMD1 and CASHMD0)): CASHMD1 and CASHMD0
select the function of the CS1/CASH pin.
Bit 15:
CASHMD1
0
1
Bit 14:
CASHMD0
0
1
0
1
Function
Reserved
Chip select output (CS1)
Column address strobe output (CASH)
Reserved
(Initial value)
• Bits 13 and 12 (CASL Mode (CASLMD1 and CASLMD0)): CASLMD1 and CASLMD0
select the function of the CS3/CASL pin.
Bit 13:
CASLMD1
0
1
Bit 12:
CASLMD0
0
1
0
1
Function
Reserved
Chip select output (CS3)
Column address strobe output (CASL)
Reserved
(Initial value)
• Bits 11–0 (Reserved): These bits are always read as 1. The write value should always be 1.
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