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4.2
AC Characteristics
4.2.1
Basis Bus Cycle
Read cycle
No.
Parameter
1
OSC period (X1/X2)
2
System clock period (= T)
3
CLKOUT low width
4
CLKOUT high width
A0 to A23 valid →
5-1
D0 to D15 input at 0 waits
A0 to A23 valid →
5-2
D0 to D15 input at 1 wait
fall →
6-1
RD
D0 to D15 input at 0 waits
RD fall →
6-2
D0 to D15 input at 1 wait
7-1
low width
RD
7-2
low width
RD
A0 to A23 valid →
8
fall →
9
RD
A0 to A23 valid →
10
rise →
11
RD
12
setup time
WAIT
13
hold time
WAIT
Write cycle
No.
Parameter
1 OSC period (X1/X2)
2 System clock period ( = T)
3 CLKOUT low width
4 CLKOUT high width
5-1 D0 to D15 valid →
WRxx
5-2 D0 to D15 valid →
WRxx
6-1
low width
WRxx
6-2
low width
WRxx
7 A0 to A23 valid →
WR
fall → CLKOUT fall
8
WRxx
rise → A0 to A23 hold
9
WRxx
rise → D0 to D15 hold
10
WRxx
11
setup time
WAIT
12
hold time
WAIT
rise → D0 to D15 output
13
RD
AC condition
• Output : High = 0.7Vcc, Low = 0.3Vcc, C
•
High = 0.9Vcc, Low = 0.1Vcc
Input :
Symbol
t
OSC
t
CYC
t
CL
t
CH
t
AD
t
AD3
t
RD
t
RD3
at 0 waits
t
RR
at 1 wait
t
RR3
fall
t
RD
AR
CLKOUT fall
t
RK
D0 to D15 hold
t
HA
D0 to D15 hold
t
HR
t
TK
t
KT
Symbol
t
OSC
t
CYC
t
CL
t
CH
rise at 0 waits
t
DW
rise at 1 wait
t
DW3
at 0 waits
t
WW
at 1 wait
t
WW3
fall
t
AW
t
WK
t
WA
t
WD
t
TK
t
KT
t
RDO
= 50 pF
L
92CM22-218
Vcc = 3.3 ± 0.3 V/fc = 4 to 40 MHz/Ta = −40 to 85°C
Min
Max
20 MHz
(fc = 40 MHz)
25
250
50
8000
0.5T − 15
0.5T − 15
2.0T − 30
3.0T − 30
1.5T − 30
2.5T − 30
1.5T − 20
2.5T − 20
0.5T − 15
0.5T − 20
0
0
15
5
Vcc = 3.3 ± 0.3 V/fc = 4 to 40 MHz/Ta = − 40 to 85°C
f
Min
Max
20 MHz
(fc = 40 MHz)
25
250
50
8000
0.5T − 15
0.5T − 15
1.25T − 35
2.25T − 35
1.25T − 30
2.25T − 30
0.5T − 15
0.5T − 20
0.25T − 5
0.25T − 3
15
5
0.5T − 5
TMP92CM22
=
=
f
f
SYS
SYS
125 kHz
Unit
(fc = 4 MHz)
25
250
50
8000
10
3985
10
3985
70
15970
120
23970
45
11970
95
19970
55
11980
105
19980
10
3985
5
3980
0
0
0
0
15
15
5
5
=
=
f
SYS
SYS
125 kHz
Unit
(fc = 4 MHz)
25
250
50
8000
10
3985
10
3985
28
9965
78
17965
33
9970
83
17970
10
3985
5
3980
8
1995
10
1997
15
15
5
5
20
3995
2007-02-16
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
ns
ns
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