Z86C90 Datasheet, PDF (9/14 Pages) Zilog, Inc. – ROMLESS CMOS Z8 8-BIT MICROCONTROLLER

AC CHARACTERISTICS
External I/O or Memory Read and Write Timing Table
No Symbol
Parameter
V
CC
T
A
=
0°C
to
+70°C
Note[3] 8 MHz 12 MHz
T
A
=
-40°C
to
+105°C
8 MHz
12 MHz
Min Max Min Max Min Max Min Max
1 TdA(AS) Address Valid to
3.3 55
35
55
35
/AS Rising Delay
5.0 55
35
55
35
2 TdAS(A) /AS Rising to Address 3.3 70
45
70
45
Float Delay
5.0 70
45
70
45
3 TdAS(DR) /AS Rising to Read
Data Required Valid
4 TwAS
/AS Low Width
3.3
400
250
400
5.0
400
250
400
3.3 80
55
80
5.0 80
55
80
250
250
55
55
5 Td
Address Float to
3.3 0
0
0
0
/DS Falling
5.0 0
0
0
0
6 TwDSR
/DS (Read) Low Width 3.3 300
200
300
200
5.0 300
200
300
200
7 TwDSW /DS (Write) Low Width 3.3
5.0
8 TdDSR(DR) /DS Falling to Read 3.3
Data Required Valid 5.0
165
165
260
260
110
110
150
160
165
165
260
260
110
110
150
160
9 ThDR(DS) Read Data to
3.3 0
0
0
0
/DS Rising Hold Time 5.0 0
0
0
0
10 TdDS(A) /DS Rising to Address 3.3 85
45
85
45
Active Delay
5.0 95
55
95
55
11 TdDS(AS) /DS Rising to /AS
3.3 60
30
60
30
Falling Delay
5.0 70
45
70
45
12 TdR/W(AS) R//W Valid to /AS
3.3 70
45
70
45
Rising Delay
5.0 70
45
70
45
13 TdDS(R/W) /DS Rising to
3.3 70
45
70
45
R//W Not Valid
5.0 70
45
70
45
14 TdDW(DSW) Write Data Valid to /DS 3.3 80
55
80
55
Falling (Write) Delay 5.0 80
55
80
55
15 TdDS(DW) /DS Rising to Write 3.3
Data Not Valid Delay 5.0
16 TdA(DR) Address Valid to Read 3.3
Data Required Valid 5.0
70
45
70
80
55
80
475
310
475
475
310
475
45
55
310
310
17 TdAS(DS) /AS Rising to
3.3 100
65
100
65
/DS Falling Delay
5.0 100
65
100
65
18 TdDI(DS) Data Input Setup to 0.0 115
115
115
115
/DS Rising
5.0 75
75
75
75
19 TdDM(AS) /DM Valid to /AS
3.3 55
35
55
35
Falling Delay
5.0 55
35
55
35
Notes:
[1] When using extended memory timing add 2 TpC.
[2] Timing numbers given are for minimum TpC.
[3] 5.0V ±0.5V, 3.3V ±0.3V.
Standard Test Load
All timing references use 0.9 V for a logic 1 and 0.1 V for a logic 0.
CC
CC
Units Notes
ns [2]
ns
ns [2]
ns
ns [1,2]
ns
ns [2]
ns
ns
ns
ns [1,2]
ns
ns [1,2]
ns
ns [1,2]
ns
ns [2]
ns
ns [2]
ns
ns [2]
ns
ns [2]
ns
ns [2]
ns
ns [2]
ns
ns [2]
ns
ns [1,2]
ns
ns [2]
ns
ns [1,2]
ns
ns [2]
ns
9