TSC80C51 TEMIC Semiconductors, TSC80C51 Datasheet - Page 14

• Manufacturer Part Number: TSC80C51
• Description: (TSC80C31 / TSC80C51) CMOS 0 to 44 MHz Single-Chip 8 Bit Microcontroller
• Manufacturer: TEMIC Semiconductors

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TSC80C31/80C51
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 44 MHz
TA= 0 to +70 C ; Vss= 0 V ; 2.7 V <Vcc < 5.5 V ; F= 0 to 16 MHz
TA=–40 to +85 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 40 MHz
(Load Capacitance for PORT 0, ALE and PSEN = 100 pF ; Load
Capacitance for all other outputs = 80 pF)
14
External Program Memory Characteristics (values in ns)
External Program Memory Read Cycle
SYMBOL
A : Address.
C : Clock.
D : Input data.
H : Logic level HIGH
I : Instruction (program memory contents).
L : Logic level LOW, or ALE.
P : PSEN.
TLLAX
TLHLL
TPXAV
TPLAZ
TAVLL
TLLPL
TPLPH
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
min max min max min max min max min max min max min max
165
110
TAVIV
16 MHz
40
35
45
55
0
185
125
230
50
10
130
20 MHz
90
30
35
40
50
0
170
110
210
45
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.
100
25 MHz
70
20
35
30
40
0
130
170
85
35
8
30 MHz
60
15
35
25
80
35
0
100
130
65
30
6
36 MHz
50
10
35
20
75
30
0
80
50
25
90
5
40 MHz
40
30
15
65
25
9
0
Rev. E (14 Jan.97)
70
45
20
80
MATRA MHS
5
44 MHz
30
20
12
54
15
7
0
65
35
10
70
5