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