HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 157

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

Figure 8.21 Byte Access Control Timing for DRAM Access (Upper Byte Write Cycle, Short
control
control
Byte
Byte
A21–A0
A21–A0
CASH
CASH
CASL
CASL
WRH
WRH
WRL
WRL
RAS
RAS
CK
CK
T
T
p
p
(a) Dual CAS signals (CW2 = 0)
(a) Dual WE signals (CW2 = 1)
Pitch)
T
T
Row address
Row address
r
r
High level fixed
High level
High level fixed
High level
T
T
Column address
Column address
c
c
HITACHI 141