SH7708 Datasheet, PDF (207/633 Pages) Renesas Technology Corp – SuperH™ RISC engine

WAIT
Wait
controller
WCR1
WCR2
Bus
interface
CS6–CS0,
CE2A, CE2B
BS
RD
RD/WR
WE3–WE0
RAS
CAS, CASxx
CKE
ICIORD, ICIOWR
IOIS16
Interrupt
controller
Area
controller
Memory
controller
Refresh
controller
BCR1
BCR2
MCR
DCR
PCR
RFCR
RTCNT
Comparator
RTCOR
RTCSR
WCR:
BCR:
MCR:
DCR:
PCR:
Wait state control register
Bus control register
Memory control register
DRAM control register
PCMCIA control register
BSC
RFCR:
RTCNT:
RTCOR:
RTCSR:
Refresh count register
Refresh timer count register
Refresh time constant register
Refresh timer control/status register
Figure 10.1 BSC Block Diagram
189