HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 494
![no-image](/images/no-image-200.jpg)
HD6417021
Manufacturer Part Number
HD6417021
Description
SuperH RISC engine
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6417021.pdf
(507 pages)
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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
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