SH7708 Datasheet, PDF (203/625 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
WCR: Wait state control register
BCR: Bus control register
MCR: Memory control register
DCR: DRAM control register
PCR: PCMCIA control register
BCR1
BCR2
MCR
DCR
PCR
RFCR
RTCNT
Comparator
RTCOR
RTCSR
BSC
RFCR: Refresh count register
RTCNT: Refresh timer count register
RTCOR: Refresh time constant register
RTCSR: Refresh timer control/status register
Figure 10.1 BSC Block Diagram
189