UPD78F4046GC-3B9 NEC, UPD78F4046GC-3B9 Datasheet - Page 24

• Manufacturer Part Number: UPD78F4046GC-3B9
• Description: 16-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

24
AC Characteristics (T
Read/write operation
System clock cycle time
Address setup time (to ASTB )
Address hold time (from ASTB )
ASTB high-level width
RD delay time from address
Address float time from RD
Data input time from address
Data input time from RD
Delay time from ASTB to RD
Data hold time (from RD )
Address active time from RD
RD low-level width
Delay time from address to LWR, HWR
Data output time from LWR, HWR
Delay time from ASTB to LWR, HWR
Data setup time (to LWR, HWR )
Data hold time (from LWR, HWR )
Delay time from LWR, HWR to ASTB
LWR, HWR low-level width
WAIT input time from address
WAIT input time from ASTB
WAIT hold time from ASTB
Delay time from ASTB to WAIT
WAIT input time from RD
WAIT hold time from RD
Delay time from RD to WAIT
WAIT input time from LWR, HWR
WAIT hold time from LWR, HWR
Delay time from LWR, HWR to WAIT
Note
Remarks 1. T = t
Specification when an external wait is inserted
2. a = 1 when an address wait is inserted, otherwise 0.
3. n indicates the number of the wait cycles as specified by the external wait pin (WAIT) or
4. Calculate values in the expression column with the system clock cycle time to be used because
Parameter
programmable wait control registers 1, 2 (PWC1, PWC2). (n 0. n 1 for t
these values depend on the system clock cycle time (t
column are calculated based on T = 62.5 ns.
CYK
A
= –10 to +70˚C, V
= 1/f
CLK
(f
CLK
is internal system clock frequency)
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CYK
SAST
HSTA
WSTH
DAR
FRA
DAID
DRID
DSTR
HRID
DRA
WRL
DAW
DWOD
DSTW
SODW
HWOD
DWST
WWL
DAWT
DSTWT
HSTWT
DSTWTH
DRWT
HRWT
DRWTH
DWWT
HWWT
DWWTH
DD
Symbol
Data Sheet U11447EJ2V0DS00
= 4.5 to 5.5 V, V
(0.5 + a) T – 20
0.5T – 20
(0.5 + a) T – 17
(1 + a) T – 15
(2.5 + a + n) T – 56
(1.5 + n) T – 48
0.5T – 16
0.5T – 14
(1.5 + n) T – 30
(1 + a) T – 15
0.5T – 16
(1.5 + n) T – 25
0.5T – 14
1.5T – 15
(1.5 + n) T – 36
(2 + a) T – 50
1.5T – 40
(1.5 + n) T + 5
(2.5 + n) T – 40
T – 40
(1 + n) T + 5
(1 + n) T – 40
T – 40
(1 + n) T + 5
(1 + n) T – 40
Expression
SS
= 0 V)
CYK
= T). The values in the above expression
MIN.
62.5
11.2
11.2
14.2
47.5
15.3
17.2
63.7
47.5
15.3
68.7
17.2
78.8
57.7
98.8
67.5
67.5
0
DSTWTH
116.2
85
85
100.2
MAX.
45.7
53.7
22.5
22.5
250
15
75
, t
0
Note
Note
DRWTH
Note
PD78F4046
, t
DWWTH
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
).