AM186EM Datasheet, PDF (68/98 Pages) List of Unclassifed Manufacturers – MICROCONTROLLER BLOCK DIAGRAM

Write Cycle Waveforms
PRELIMINARY
CLKOUTA
A19–A0
S6
AD15–AD0*,
AD7–AD0**
AO15–AO8**
ALE
WR
WHB*, WLB*
WB**
BHE*
LCS, UCS
MCS3–MCS0,
PCS6–PCS5,
PCS3–PCS0
DEN
DT/R
S2–S0
UZI
t₁
t₂
t₃
t₄
t_W
65
68
S6
14
Address
Address
S6
7
Data
6
Address
23
9
10
12
11
13
31
32
20
20
31
87
5
BHE
67
8
30
34
33
16
22^***
3
20
Status
17
31
18
35
19
22^***
4
Note:
*
Am186EM microcontroller only
** _{Am188EM microcontroller only}
*** Changes in t₄ phase of the clock preceding next bus cycle if followed by read, INTA, or halt.
68
Am186/188EM and Am186/188EMLV Microcontrollers