HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 130

• Manufacturer Part Number: HD6417034B
• Description: 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 8 Bus State Controller (BSC)
8.1.2
Figure 8.1 shows a block diagram of the bus state controller.
Rev. 7.00 Jan 31, 2006 page 104 of 658
REJ09B0272-0700
Refresh counter can be used as an interval timer
Interrupt request generated at compare match (CMI interrupt request signal)
Block Diagram
WCR: Wait state control register
BCR: Bus control register
DCR: DRAM area control register
RCR: Refresh control register
CMI interrupt request
controller
Interrupt
PEI interrupt request
CASH, CASL
CS7 to CS0
WRH, WRL
HBS, LBS
DPH, DPL
WAIT
RAS
RD
AH
Figure 8.1 Block Diagram of BSC
Parity control
Area control
Wait control
DRAM
control
unit
unit
unit
unit
RTCSR: Refresh timer control/status register
RTCNT: Refresh timer counter
RTCOR: Refresh time constant register
PCR: Parity control register
BSC
Comparator
RTCOR
RTCSR
RTCNT
WCR1
WCR2
WCR3
BCR
DCR
RCR
PCR
interface
Bus