UPD70208HGF-12-3B9 NEC [NEC], UPD70208HGF-12-3B9 Datasheet - Page 26

• Manufacturer Part Number: UPD70208HGF-12-3B9
• Description: V40HLTM, V50HLTM 16/8, 16-BIT MICROPROCESSOR
• Manufacturer: NEC [NEC]

26
Note
Internal Refresh Request
Internal Refresh Request
The period in which the external bus master which has been given the bus after its release by the V40HL and
V50HL can use the bus.
Internal DMA Request
(Highest Priority)
(Highest Priority)
HLDRQ Pin
Bus Cycle
HLDAK Pin
Bus Cycle
Figure 6-1. Internal Bus Cycles
CPU
Figure 6-2. Bus Wait Operation
Bus Release
Data Sheet U13225EJ4V0DS00
CPU
Note
DMA
Bus Wait
Refresh
Refresh
PD70208H, 70216H
Refresh
Refresh