HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 425

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

14.3.5
CASCR is a 16-bit read/write register that allows selection between column address strobe and
chip select pin functions. The CASCR is initialized to H'5FFF by power-on resets but is not
initialized for manual resets, standby mode, or sleep mode.
• Bits 15 and 14 (CASH mode (CASHMD1 and CASHMD0)): CASHMD1 and CASHMD0
Bit 15: CASHMD1
0
1
• Bits 13 and 12 (CASL mode (CASLMD1 and CASLMD0)): CASLMD1 and CASLMD0
Bit 13: CASLMD1
0
1
• Bits 11–0 (reserved): This bit always reads as 1. The write value should always be 1.
select the function of the CS1/CASH pin.
select the function of the CS3/CASL pin.
Initial value:
Initial value:
Bit name:
Bit name:
Column Address Strobe Pin Control Register (CASCR)
R/W:
R/W:
Bit:
Bit:
CASH
MD1
R/W
Bit 14: CASHMD0
0
1
0
1
Bit 12: CASLMD0
0
1
0
1
15
—
—
0
7
1
CASH
MD0
R/W
14
—
—
1
6
1
CASL
MD1
R/W
13
—
—
0
5
1
Function
Reserved
Chip select output (CS1) (initial value)
Column address strobe output (CASH)
Reserved
Function
Reserved
Chip select output (CS3) (initial value)
Column address strobe output (CASL)
Reserved
CASL
MD0
R/W
12
—
—
1
4
1
11
—
—
—
—
1
3
1
10
—
—
—
—
1
2
1
—
—
—
—
9
1
1
1
HITACHI 413
—
—
—
—
8
1
0
1