HD6433308 Datasheet, PDF (258/349 Pages) Hitachi Semiconductor – Hitachi Single-Chip MicroComputer

Table 13-6. AC Characteristics (cont.)
(When VCC = 6.0V ±0.25V, VPP = 12.5V ±0.3V, Ta = 25˚C ±5˚C)
Measurement
Item
Symbol min typ max Unit conditions
OE pulse width for
tOPW
2.85 —
78.75 ms
See Figure 13-5*
overwrite-programming
Vcc setup time
tVCS
2
— — µs
Data output delay time
tOE
0
— 500 ns
* Input pulse level: 0.8V to 2.2V
Input rise/fall time ^<= 20ns
Timing reference levels: input—1.0V, 2.0V; output—0.8V, 2.0V
Address
Data
VPP
VPP
VCC
VCC
VCC
GND
CE
OE
Write
tAS
Input data
tDS
tDH
tVPS
tVCS
tPW
tOPW
tOES
Verify
tAH
Output data
tDF
tOE
Figure 13-5. PROM Write/Verify Timing
248