HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 126

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

6.1.2 Block Diagram
Figure 6-1 shows a block diagram of the bus controller.
CPU bus request signal
DMAC bus request signal
Refresh controller bus request signal
CPU bus acknowledge signal
DMAC bus acknowledge signal
Refresh controller bus acknowledge signal
Legend
ABWCR:
ASTCR:
WCER:
WCR:
BRCR:
CSCR:
Internal
address bus
WAIT
Bus width control register
Access state control register
Wait state controller enable register
Wait control register
Bus release control register
Chip select control register
Internal signals
decoder
Area
Figure 6-1 Block Diagram of Bus Controller
Chip select
control signals
CS to CS
0
7
Bus control
Bus arbiter
Wait-state
controller
circuit
112
ABWCR
ASTCR
WCER
CSCR
BRCR
WCR
BACK
BREQ
Bus mode control signal
Bus size control signal
Access state control signal
Wait request signal
Internal signals