557
CHAPTER 26
ยต
PD78P054, 78P058
Figure 26-7. Byte Program Mode TimingCautions 1. Be sure to apply VDD before applying VPP, and remove it after removing VPP.
2. VPP must not exceed +13.5 V including overshoot voltage.
3. Disconnecting/inserting the device from/to the on-board socket while +12.5 V is being appliedto the VPP pin may have an adverse affect on device reliability.
A0-A16
D0-D7
Program
Hi-Z
Program Verify
Data Input Data Output
V
PP
V
DD
V
DD
+1.5
V
DD
V
IH
V
IL
V
IH
V
IL
V
IH
V
IL
V
PP
V
DD
CE
PGM
OE