MC68HC11F1_13 Datasheet, PDF (146/158 Pages) Freescale Semiconductor, Inc – Technical Data

Freescale Semiconductor, Inc.
Table A-7 Expansion Bus Timing
V_DD = 5.0 Vdc ± 5%, V_SS = 0 Vdc, T_A = T_L to T_H
Num
Characteristic
Symbol 2.0 MHz
3.0 MHz
Min Max Min Max
Frequency of Operation (E-Clock Frequency)
1 Cycle Time
2 Pulse Width, E Low
PW_EL = 1/2 t_cyc – 20 ns
3 Pulse Width, E High
PW_EH = 1/2 t_cyc – 25 ns
4A E Clock
4B
t_cyc = 1/f_o
(Note 2)
Rise Time
Fall Time
9 Address Hold Time
t_AH = 1/8 t_cyc – 10 ns
11 Address Delay Time
t_AD = 1/8 t_cyc + 40 ns
12 Address Valid Time to E Rise
t_AV = PW_EL – t_AD
17 Read Data Setup Time
18 Read Data Hold Time
19 Write Data Delay Time
21 Write Data Hold Time
t_DHW = 1/8 t_cyc
29 MPU Address Access Time
t_ACCA = t_cyc – t_f – t_DSR – t_AD
39 Write Data Setup Time
t_DSW = PW_EH – t_DDW
50 E Valid Chip Select Delay Time
(Note 2)
(Note 2)
51 E Valid Chip Select Access Time
t_ECSA = PW_EH – t_ECSD – t_DSR
52 Chip Select Hold Time
(Note 2)
54 Address Valid Chip Select Delay Time
t_ACSD = 1/4 t_cyc + 40 ns
55 Address Valid Chip Select Access Time
t_ACSA = t_cyc – t_f – t_DSR – t_ACSD
56 Address Valid to Chip Select Time
(Note 2)
57 Address Valid to Data Three-State Time
f_o
t_cyc
PW_EL
PW_EH
t_r
t_f
t_AH
t_AD
t_AV
t_DSR
t_DHR
t_DDW
t_DHW
t_ACCA
t_DSW
t_ECSD
t_ECSA
t_CH
t_ACSD
t_ACSA
t_AVCS
t_AVDZ
dc 2.0 dc 3.0
500 — 333 —
230 — 147 —
225 — 142 —
— 20 — 20
— 20 — 18
53 — 32 —
— 103 — 82
128 — 65 —
30 — 30 —
0—0—
— 40 — 40
63 — 42 —
348 — 203 —
185 — 102 —
— 40 — 40
155 — 72 —
0 20 0 20
— 165 — 123
285 — 162 —
10 — 10 —
— 10 — 10
NOTES:
1. Input clocks with duty cycles other than 50% affect bus performance.
2. Indicates a parameter affected by clock stretching. Add n(t_cyc) to parameter value, where:
n = 1, 2, or 3 depending on values written to CSSTRH register.
3. All timing is shown with respect to 20% V_DD and 70% V_DD, unless otherwise noted.
4.0 MHz
Min Max
dc 4.0
250 —
105 —
100 —
— 20
— 15
21 —
— 71
34 —
20 —
0—
— 40
31 —
144 —
60 —
— 40
40 —
0 20
— 103
113 —
10 —
— 10
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
A-12
ELECTRICAL CHARACTERISTICS
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MC68HC11F1
TECHNICAL DATA