NEC 78K0 User Manual page 547

CHAPTER 30 ELECTRICAL SPECIFICATIONS (STANDARD PRODUCTS, (A) GRADE PRODUCTS)
External data access (no wait):
A8 to A15
AD0 to AD7
ASTB
RD
WR
External data access (wait insertion):
A8 to A15
AD0 to AD7
ASTB
RD
WR
WAIT
t
ADD2
Hi-Z
Lower 8-bit address
t
RDAD
t
ADS
t
t
RDD2
ADH
t
ASTH
t
t
ASTRD RDL2
t
ASTWR
t
ADD2
Hi-Z
Lower 8-bit
address
t
RDAD
t
t
ADH
ADS
t
ASTH
t
RDD2
t
ASTRD
t
ASTWR
t
t
WTL
RDWT2
User's Manual U15947EJ2V0UD
Higher 8-bit address
Read data
t
RDH
t
RDWD
t
WRWD
Higher 8-bit address
Read data
* t
RDH
t
RDWD
t
RDL2
t
WRWD
t
WTRD
t
WRWT
Hi-Z
Write data
t
t
WDS
WDH
t
WRADH
t
WRL1
Hi-Z
Write data
t t
WDS WDH
t
t
WRL1 WRADH
t
WTL
t
WTWR
547