HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 494

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

HITACHI 486
WRH,
WRL
RAS
CAS
WRH,
CK
WRL
RAS
CAS
CK
T
Figure 19.29 CAS-before-RAS Refresh (Short Pitch)
Rp
Figure 19.30 CAS-before-RAS Refresh (Long Pitch)
T
Rp
t
CASD2
t
CSR
T
Rr
t
CASD2
t
RASD1
t
CSR
T
Rr
t
RASD1
T
Rc
T
Rc
T
Rc
t
t
RASD2
CASD3
t
t
RASD2
CASD3