HD6417034 Datasheet, PDF (687/691 Pages) Renesas Technology Corp – SuperH RISC ENGINE SH7032 AND SH7034

Table B.2 Pin States in Address Space Accesses (cont)
External Memory Space
16-Bit Space
WRH, WRL, A0 System
WR, HBS, LBS System
Pin Name
8-Bit Upper
Space Byte
Lower
Byte
Word
Upper
Byte
Lower
Byte
Word
CS7–CS0
Valid Valid
Valid
Valid
Valid
Valid
Valid
RAS
High High
High
High
High
High
High
CASH
High High
High
High
High
High
High
CASL
High High
High
High
High
High
High
AH
Low
Low
Low
Low
Low
Low
Low
RD
R Low
Low
Low
Low
Low
Low
Low
W High High
High
High
High
High
High
WRH/LBS R —*
High
High
High
High
Low
Low
W —*
Low
High
Low
High
Low
Low
WRL/WR R High High
High
High
High
High
High
W Low
High
Low
Low
Low
Low
Low
A0/HBS
A0
A0
A0
A0
Low
High
Low
A21–A1
Address Address Address Address Address Address Address
AD15–AD8
High-Z Data
High-Z Data
Data
High-Z Data
AD7–AD0
Data High-Z Data
Data
High-Z Data
Data
DPH
High-Z Parity
High-Z Parity Parity
High-Z Parity
DPL
Parity High-Z Parity
Parity High-Z Parity
Parity
R: Read
W: Write
Valid: Chip select signal for the area accessed is low; other chip select signals are high.
Parity: When an area 2 parity check is selected with the parity check enable bits (PCHK1, PCHK0)
in the parity control register (PCR), this pin is used as the parity pin.
Note: * Cannot be used; available only for 16-bit space access.
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