UPD784218 Datasheet, PDF (69/92 Pages) NEC – 16-/8-BIT SINGLE-CHIP MICROCONTROLLERS

µPD784218, 784218Y
AC Characteristics
(1) Read/write operation (2/2)
Parameter
Data output delay time WR↓
Symbol
tDWOD
Conditions
MIN.
Delay time from ASTB↓ to WR↓ tDSTW VDD = 5.0 V
VDD = 3.0 V
Data setup time (to WR↑)
tSODWR VDD = 5.0 V
VDD = 3.0 V
Data hold time (from WR↑)
tHWOD VDD = 5.0 V
VDD = 3.0 V
ASTB↑ delay time (from WR↑) tDWST VDD = 5.0 V
VDD = 3.0 V
WR low-level width
tWWL VDD = 5.0 V
VDD = 3.0 V
0.5T – 9
0.5T – 9
(1.5 + n) T – 20
(1.5 + n) T – 25
0.5T – 14
0.5T – 14
0.5T – 9
0.5T – 9
(1.5 + n) T – 25
(1.5 + n) T – 30
Remark T: tCYK = 1/fXX (fXX: main system clock frequency)
a: 1 (during address wait), otherwise 0
n: Number of waits (n ≥ 0)
TYP.
10
MAX.
Unit
62
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Data Sheet U12304EJ2V0DS00
69