UPD784907 Datasheet, PDF (76/98 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784907, 784908
(2) External wait timing
Parameter
WAIT↓ input time from address
WAIT↓ input time from ASTB↓
WAIT hold time from ASTB↓
Delay from ASTB↓ to WAIT↑
WAIT↓ input time from RD↓
WAIT hold time from RD↓
Delay from RD↓ to WAIT↑
Data input time from WAIT↑
Delay from WAIT↑ to RD↑
Delay from WAIT↑ to WR↑
WAIT↓ input time from WR↓
WAIT hold time from WR↓
Delay from WR↓ to WAIT↑
Symbol
tDAWT
tDSTWT
tHSTWT
tDSTWTH
tDRWTL
tHRWT
tDRWTH
tDWTID
tDWTR
tDWTW
tDWWTL
tHWWT
tDWWTH
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
VDD = 5.0 V
Conditions
(2 + a)T – 40
1.5T – 40
(0.5 + n)T + 5
(1.5 + n)T – 40
T – 40
nT + 5
(1 + n)T – 40
0.5T – 5
0.5T
0.5T
T – 40
nT + 5
(1 + n)T – 40
Remark T: tCYK (system clock cycle time) VDD = 5.0 V T = 79 ns (MIN.)
a: 1 during address wait, otherwise, 0
n: number of wait states (n ≥ 0)
MIN.
MAX.
Unit
198
ns
79
ns
124
ns
238
ns
39
ns
84
ns
198
ns
35
ns
40
ns
40
ns
39
ns
84
ns
198
ns
76
Data Sheet U11680EJ2V0DS00