AM186ED Datasheet, PDF (66/88 Pages) Advanced Micro Devices – High Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers

READ CYCLE WAVEFORMS
PRELIMINARY
t₁
t₂
t₃
t₄
t_W
CLKOUTA
A19–A0
66
Address
68
8
S6
S6
INVALID
S6
AD15–AD0^(a),
AD7–AD0^(b)
14
6
Address
1
Data
2
AD15–AD8^(b)
ALE
23
9
RD
BHE^(a)
67
LCS, UCS
MCS1–MCS0,
PCS6–PCS5,
PCS3–PCS0
DEN, DS
DT/R
S2–S0
D19
(c)
22
10
T ₁₂
5
R ^{A F 16}
Address
11
15
24
25
13
99
26
BHE
29
59
28
27
41
18
17
20
21
4
Status
(c)
22
3
UZI
Notes:
a Am186ED/EDLV microcontrollers in 16-bit mode
b Am186ED/EDLV microcontrollers in 8-bit mode
c Changes in t phase preceding next bus cycle if followed by read, INTA, or halt.
66
Am186ED/EDLV Microcontrollers