HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 110

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

94 HITACHI
WCR: Wait state control register
BCR: Bus control register
DCR: DRAM area control register
RCR: Refresh control register
controller
CMI interrupt request
Interrupt
PEI interrupt request
CASH, CASL
CS7 to CS0
WRH, WRL
HBS, LBS
DPH, DPL
WAIT
RAS
RD
AH
Figure 8.1 BSC Block Diagram
Parity control
Area control
Wait control
control
DRAM
unit
unit
unit
unit
RTCSR: Refresh timer control/status register
RTCNT: Refresh timer counter
RTCOR: Refresh time constant register
PCR: Parity control register
Comparator
RTCOR
RTCSR
WCR1
WCR2
RTCNT
WCR3
BCR
DCR
RCR
PCR
interface
Bus