NEC 78K0 User Manual page 546

CHAPTER 30 ELECTRICAL SPECIFICATIONS (STANDARD PRODUCTS, (A) GRADE PRODUCTS)
RESET Input Timing
Read/Write Operation
External fetch (no wait):
A8 to A15
AD0 to AD7
ASTB
RD
External fetch (wait insertion):
A8 to A15
AD0 to AD7
ASTB
RD
WAIT
546
RESET
Higher 8-bit address
t
ADD1
Hi-Z
Lower 8-bit address
t
RDAD
t
ADS
t
t
ADH RDD1
t
ASTH
t
ASTRD
t
ADD1
Lower 8-bit address
t
RDAD
t
ADS
t
ADH
t
ASTH
t
ASTRD
t
RDWT1
User's Manual U15947EJ2V0UD
t
RSL
Instruction code
t
RDADH
t
RDAST
t
RDL1 t
RDH
*
Higher 8-bit address
Hi-Z
Instruction code
t
RDD1
t
RDL1
t t
WTL WTRD
t
RDADH
t
RDAST
t
RDH