80C154 TEMIC Semiconductors, 80C154 Datasheet - Page 19

• Manufacturer Part Number: 80C154
• Description: CMOS 0 to 36 MHz Single Chip 8-bit Microcontroller
• Manufacturer: TEMIC Semiconductors

Rev.F (14 Jan. 97)
Explanation of the AC Symbol
Each timing symbol has 5 characters. The first character
is always a “T” (stands for time). The other characters,
depending on their positions, stand for the name of a
signal or the logical status of that signal. The following
is a list of all the characters and what they stand for.
AC Parameters
TA = 0 to + 70 C ; Vss = 0 V ; Vcc = 5 V 10 % ; F = 0 to 36 MHz
TA = –55 + 125 C ; Vss = 0 V ; 2.7 V < Vcc < 5.5 V ; F = 0 to 16 MHz
TA = –55 + 125 C ; Vss = 0 V ; Vcc = 5 V 10 % ; F = 0 to 36 MHz
(Load Capacitance for PORT 0, ALE and PSEN = 100 pF ; Load Capacitance for all other outputs = 80 pF)
MATRA MHS
External Program Memory Characteristics
External Program Memory Read Cycle
A : Address.
C : Clock.
D : Input data.
H : Logic level HIGH
I : Instruction (program memory contents).
L : Logic level LOW, or ALE.
P : PSEN.
SYMBOL
TLLAX
TLHLL
TPXAV
TAVLL
TLLPL
TPLPH
TPLAZ
TLLIV
TPLIV
TPXIX
TPXIZ
TAVIV
ALE Pulse Width
Address valid to ALE
Address Hold After ALE
ALE to valid instr in
ALE to PSEN
PSEN pulse Width
PSEN to valid instr in
Input instr Hold After PSEN
Input instr Float After PSEN
PSEN to Address Valid
Address to Valid instr in
PSEN low to Address Float
PARAMETER
TAVIV
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
165
110
40
35
45
55
0
16 MHz
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185
125
230
50
10
Q : Output data.
R : READ signal.
T : Time.
V : Valid.
W : WRITE signal.
X : No longer a valid logic level.
Z : Float.
Example :
TAVLL = Time for Address Valid to ALE low.
TLLPL = Time for ALE low to PSEN low.
130
90
30
35
40
50
20 MHz
0
170
110
210
45
10
80C154/83C154
100
70
20
35
30
40
0
25 MHz
130
170
85
35
8
60
15
35
25
80
35
0
30 MHz
100
130
65
30
6
50
10
35
20
75
30
0
36 MHz
80
50
25
90
5
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