UPD784907 Datasheet, PDF (75/98 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784907, 784908
AC Characteristics (TA = –40 to +85°C, VDD = AVDD = 3.5 to 5.5 V, AVSS = VSS = 0 V)
(1) Read/write operation
Parameter
Address setup time (to ASTB↓)
ASTB high-level width
Address hold time (from ASTB↓)
Address hold time (from RD↑)
Delay from address to RD↓
Address float time (from RD↓)
Data input time from address
Data input time from ASTB↓
Data input time from RD↓
Delay from ASTB↓ to RD↓
Data hold time (from RD↑)
Address active time from RD↑
Delay from RD↑ to ASTB↑
RD low-level width
Delay from address↓ to WR↓
Address hold time (from WR↑)
Delay from ASTB↓ to data output
Delay from WR↓ to data output
Delay from ASTB↓ to WR↓
Data setup time (to WR↑)
Data hold time (from WR↑)
Delay from WR↑ to ASTB↑
WR low-level width
Symbol
tSAST
tWSTH
tHSTLA
tHRA
tDAR
tFRA
tDAID
tDSTID
tDRID
tDSTR
tHRID
tDRA
tDRST
tWRL
tDAW
tHWA
tDSTOD
tDWOD
tDSTW
tSODWR
tHWOD
tDWST
tWWL
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
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
(0.5 + a)T – 11
(0.5 + a)T – 17
0.5T – 19
0.5T – 14
(1 + a)T – 5
(2.5 + a + n)T – 37
(2 + n)T – 35
(1.5 + n)T – 40
0.5T – 9
0.5T – 2
0.5T – 9
(1.5 + n)T – 25
(1 + a)T – 5
0.5T – 14
0.5T + 15
0.5T – 9
(1.5 + n)T – 20
0.5T – 14
0.5T – 9
(1.5 + n)T – 25
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
29
ns
23
ns
21
ns
26
ns
74
ns
0
ns
400
ns
283
ns
238
ns
31
ns
0
ns
38
ns
31
ns
94
ns
74
ns
26
ns
55
ns
15
ns
31
ns
99
ns
26
ns
31
ns
94
ns
Data Sheet U11680EJ2V0DS00
75