z86e21 ZiLOG Semiconductor, z86e21 Datasheet - Page 9

• Manufacturer Part Number: z86e21
• Description: Cmos Z8 Otp Microcontroller
• Manufacturer: ZiLOG Semiconductor

AC CHARACTERISTICS
External I/O or Memory Read and Write Timing Table
Notes:
[1] When using extended memory timing add 2 TpC.
[2] Timing numbers given are for minimum TpC.
[3] See clock cycle dependent characteristics table.
Standard Test Load
All timing references use 2.0V for a logic 1 and 0.8V for a logic 0.
No Symbol
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
TdA(AS)
TdAS(A)
TdAS(DR)
TwAS
TdAZ(DS)
TwDSR
TwDSW
TdDSR(DR)
ThDR(DS)
TdDS(A)
TdDS(AS)
TdR/W(AS)
TdDS(R/W)
TdDW(DSW) Write Data Valid to /DS Fall (Write) Delay
TdDS(DW)
TdA(DR)
TdAS(DS)
TdDI(DS)
TdDM(AS)
Parameter
Address Valid to /AS Rise Delay
/AS Rise to Address Float Delay
/AS Rise to Read Data Req’d Valid
/AS Low Width
Address Float to /DS Fall
/DS (Read) Low Width
/DS (Write) Low Width
/DS Fall to Read Data Req’d Valid
Read Data to /DS Rise Hold Time
/DS Rise to Address Active Delay
/DS Rise to /AS Fall Delay
R//W Valid to /AS Rise Delay
/DS Rise to R//W Not Valid
/DS Rise to Write Data Not Valid Delay
Address Valid to Read Data Req’d Valid
/AS Rise to /DS Fall Delay
Data Input Setup to /DS Rise
/DM Valid to /AS Fall Delay
Max Min Max Min Max Min Max Min Units Notes
185
110
35
45
55
45
55
30
35
35
35
55
75
50
0
0
12 MHz
T
A
= 0 C to 70 C
220
130
255
Number
1
2
3
4
6
7
8
10
11
12
13
14
15
16
17
18
19
16 MHz
135
20
30
35
80
35
30
20
30
25
30
40
60
30
0
0
180
200
75
Clock Dependent Formulas
Symbol
TdA(AS)
TdAS(A)
TdAS(DR)
TwAS
TwDSR
TwDSW
TdDSR(DR)
TdDS(A)
TdDS(AS)
TdR/W(AS)
TdDS(R/W)
TdDW(DSW)
TdDS(DW)
TdA(DR)
TdAS(DS)
TsDI(DS)
TdDM(AS)
12 MHz
185
110
35
45
55
65
45
33
50
35
55
65
75
50
0
0
T
A
= -40 C to 105 C
250
130
310
16 MHz
135
25
35
40
80
50
35
25
35
25
35
45
60
30
0
0
180
230
75
Equation
0.40TpC + 0.32
0.59TpC - 3.25
2.38TpC + 6.14
0.66TpC - 1.65
2.33TpC - 10.56
1.27TpC + 1.67
1.97TpC - 42.5
0.8TpC
0.59TpC - 3.14
0.4TpC
0.8TpC - 15
0.4TpC
0.88TpC - 19
4TpC - 20
0.91TpC - 10.7
0.8TpC - 10
0.9TpC - 26.3
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
[1,2,3]
[1,2,3]
[1,2,3]
[1,2,3]
[1,2,3]
[1,2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
[2,3]
9