UPD78F0034A NEC, UPD78F0034A Datasheet - Page 42

• Manufacturer Part Number: UPD78F0034A
• Description: 8 Bit Single Chip Microcontroller
• Manufacturer: NEC

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AD0 to AD7
A8 to A15
AD0 to AD7
A8 to A15
42
External data access (no wait):
External data access (wait insertion):
ASTB
WR
ASTB
RD
WAIT
WR
RD
t
ASTH
t
ADS
t
Lower 8-bit
ASTH
t
Lower 8-bit
address
ADS
address
t
RDWT2
t
t
ADH
t
ASTRD
ADH
t
ADD2
t
t
ASTRD
RDAD
t
ADD2
t
t
Hi-Z
RDAD
RDD2
t
Hi-Z
RDD2
Data Sheet U14040EJ4V0DS
t
WTL
t
ASTWR
t
RDL2
t
t
ASTWR
RDL2
Read data
Higher 8-bit address
Higher 8-bit address
Read data
t
WTRD
t
RDH
t
RDWD
t
WRWD
t
t
RDH
RDWD
t
WRWD
t
µ PD78F0034A, 78F0034AY
WRWT
t
Write data
WRL1
t
t
WDS
WRL1
t
WTL
t
Write data
WDS
t
WTWR
t
WDH
t
t
WRADH
WDH
t
WRADH
Hi-Z
Hi-Z