AM186EM Datasheet, PDF (65/98 Pages) List of Unclassifed Manufacturers – MICROCONTROLLER BLOCK DIAGRAM

Read Cycle Waveforms
PRELIMINARY
CLKOUTA
A19–A0
S6
AD15–AD0*,
AD7–AD0**
AO15–AO8**
ALE
RD
BHE*
LCS, UCS
MCS1–MCS0,
PCS6–PCS5,
PCS3–PCS0
DEN
DT/R
S2–S0
UZI
t₁
t₂
t₃
t₄
t_W
66
68
S6
14
Address
23
9
11
10
12
5
67
Address
S6
6
1
Data
Address
8
2
15
24
25
13
26
BHE
29
59
28
27
18
16
17
20
21
19
*** ₂₂
3
4
Status
*** ₂₂
Notes:
*
Am186EM microcontroller only
** _{Am188EM microcontroller only}
*** Changes in t₄ phase of the clock preceding next bus cycle if followed by read, INTA, or halt
Am186/188EM and Am186/188EMLV Microcontrollers
65