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
fSYS =
20 MHz
(fc = 40 MHz)
fSYS =
125 kHz
(fc = 4 MHz) Unit
1 OSC period (X1/X2) tOSC 25 250 25 250 ns
2 System clock period (= T) tCYC 50 8000 50 8000 ns
3 CLKOUT low width tCL 0.5T − 15 10 3985 ns
4 CLKOUT high width tCH 0.5T − 15 10 3985 ns
5-1 A0 to A23 valid →
D0 to D15 input at 0 waits tAD 2.0T − 30 70 15970 ns
5-2 A0 to A23 valid →
D0 to D15 input at 1 wait tAD3 3.0T − 30 120 23970 ns
6-1 RDfall →
D0 to D15 input at 0 waits tRD 1.5T − 30 45 11970 ns
6-2 RDfall →
D0 to D15 input at 1 wait tRD3 2.5T − 30 95 19970 ns
7-1 RD low width at 0 waits tRR 1.5T − 20 55 11980 ns
7-2 RD low width at 1 wait tRR3 2.5T − 20 105 19980 ns
8 A0 to A23 valid → RD fall tAR 0.5T − 15 10 3985 ns
9 RD fall → CLKOUT fall tRK 0.5T − 20 5 3980 ns
10 A0 to A23 valid → D0 to D15 hold tHA 0 0 0 ns
11 RD rise → D0 to D15 hold tHR 0 0 0 ns
12 WAIT setup time tTK 15 15 15 ns
13 WAIT hold time tKT 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
fSYS =
20 MHz
(fc = 40 MHz)
fSYS =
125 kHz
(fc = 4 MHz) Unit
1 OSC period (X1/X2) tOSC 25 250 25 250 ns
2 System clock period (= T) tCYC 50 8000 50 8000 ns
3 CLKOUT low width tCL 0.5T − 15 10 3985 ns
4 CLKOUT high width tCH 0.5T − 15 10 3985 ns
5-1 D0 to D15 valid →WRxxrise at 0 waits tDW 1.25T − 35 28 9965 ns
5-2 D0 to D15 valid →WRxxrise at 1 wait tDW3 2.25T − 35 78 17965 ns
6-1 WRxx low width at 0 waits tWW 1.25T − 30 33 9970 ns
6-2 WRxx low width at 1 wait tWW3 2.25T − 30 83 17970 ns
7 A0 to A23 valid → WR fall tAW 0.5T − 15 10 3985 ns
8 WRxx fall → CLKOUT fall tWK 0.5T − 20 5 3980 ns
9 WRxx rise → A0 to A23 hold tWA 0.25T − 5 8 1995 ns
10 WRxx rise → D0 to D15 hold tWD 0.25T − 3 10 1997 ns
11 WAIT setup time tTK 15 15 15 ns
12 WAIT hold time tKT 5 5 5 ns
13 RD rise → D0 to D15 output tRDO 0.5T − 5 20 3995 ns
AC condition
• Output : High = 0.7Vcc, Low = 0.3Vcc, CL = 50 pF