UPD784224 Datasheet, PDF (69/92 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCONTROLLERS

µPD784224, 784225, 784224Y, 784225Y
AC Characteristics
(TA = −40°C to +85°C, VDD = VDD0 = VDD1 = AVDD = 1.8 to 5.5 V, VSS = VSS0 = VSS1 = AVSS = 0 V)
(1) Read/write operation (3/3)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Data hold time (from WR↑)
tHWOD VDD = 5.0 V ±10%
0.5T − 14
ns
VDD = 3.0 V ±10%
0.5T − 14
ns
VDD = 2.0 V ±10%
0.5T − 50
ns
Delay time from WR↑ to
tDWST VDD = 5.0 V ±10%
0.5T − 9
ns
ASTB↑
VDD = 3.0 V ±10%
0.5T − 9
ns
VDD = 2.0 V ±10%
0.5T − 30
ns
WR low-level width
tWWL
VDD = 5.0 V ±10%
(1.5 + n) T − 25
ns
VDD = 3.0 V ±10%
(1.5 + n) T − 30
ns
VDD = 2.0 V ±10%
(1.5 + n) T − 30
ns
Remark T: tCYK = 1/fXX (fXX: Main system clock frequency)
a: 1 (during address wait), otherwise, 0
n: Number of wait states (n ≥ 0)
Data Sheet U12376EJ1V0DS00
69