HD6412350 Hitachi, HD6412350 Datasheet - Page 141

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

6.1.2
Figure 6-1 shows a block diagram of the bus controller.
External bus control signals
CS0 to CS7
BREQ
BACK
BREQO
WAIT
External DRAM
signals
Block Diagram
Figure 6-1 Block Diagram of Bus Controller
DRAM/PSRAM
controller
controller
Wait
Area decoder
Bus arbiter
controller
Bus
DRAMCR
ABWCR
RTCOR
ASTCR
RTCNT
WCRH
BCRH
WCRL
BCRL
MCR
CPU bus request signal
DTC bus request signal
DMAC bus request signal
CPU bus acknowledge signal
DTC bus acknowledge signal
DMAC bus acknowledge signal
Internal control
signals
Bus mode signal
Internal
address bus
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