UPD78P4916 Datasheet, PDF (45/56 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD78P4916
PROM Write Mode Timing (Byte Programming Mode)
Programming
Program verify
A0 - A16
tAS
Hi-Z
Hi-Z
D0 - D7
Data input
VPP
VPP
VDDP
VDDP
VDD+1.5
VDDP
VIH
CE
VIL
VIH
PGM
VIL
VIH
OE
VIL
tDS
tDH
tVPS
tVDS
tCES
tPW
tOES
tOE
tDF
Data output
tAH
Hi-Z
Cautions 1. Apply voltage to VDDP before applying voltage to VPP, and cut off VDDP voltage after VPP voltage
is cut off.
2. The voltage, including overshoot, applied to VPP pin must be kept less than +13.5 V.
3. If a device is inserted or removed while +12.5 V is applied to VPP pin, it may be adversely
affected in reliability.
PROM Read Mode Timing
A0 - A16
Valid address
CE
OE
D0 - D7
tCE
Hi-Z
tOE^{Note 1}
tACC^{Note 1}
tOH
Data output
tDF^{Note 2}
Hi-Z
Notes 1. If data need to be read within tACC, the maximum delay time of OE active level input from CE falling
should be tACC – tOE.
2. tDF is the time after either OE or CE first rose to VIH.
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