參數(shù)資料
型號: SAB-C540U-EP
廠商: SIEMENS A G
元件分類: 微控制器/微處理器
英文描述: 8-Bit CMOS Microcontroller
中文描述: 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PDIP52
文件頁數(shù): 48/65頁
文件大?。?/td> 427K
代理商: SAB-C540U-EP
Semiconductor Group
48
1997-10-01
C540U
C541U
AC Characteristics
V
CC
= 4.0V to 5.5V (5V +10%, -20%);
V
SS
= 0 V
(
C
L
for port 0, ALE and PSEN outputs = 100 pF;
C
L
for all other outputs = 80 pF)
T
A
= 0 to 70
°
C
Program Memory Characteristics
*)
Interfacing the C540U/C541U to devices with float times up to 28 ns is permissible. This limited bus contention
will not cause any damage to port 0 drivers.
**)
For correct function of the USB module the C540U/C541U must operate with 12 MHz external clock. The
microcontroller (except the USB module) operates down to 2 MHz.
Parameter
Symbol
Limit Values
Unit
10-MHz clock
Duty Cycle
0.4 to 0.6
Variable Clock
1/CLP = 2 MHz to
12 MHz
**)
min.
max.
min.
max.
ALE pulse width
t
LHLL
t
AVLL
t
LLAX
t
LLIV
t
LLPL
t
PLPH
43
CLP - 40
ns
Address setup to ALE
13
TCL
Hmin
-20 –
TCL
Hmin
-20 –
ns
Address hold after ALE
13
ns
ALE to valid instruction in
80
2 CLP - 87
ns
ALE to PSEN
13
TCL
Lmin
-20
CLP+
TCL
Hmin
-30
ns
PSEN pulse width
86
ns
PSEN to valid instruction in
t
PLIV
51
CLP+
TCL
Hmin
- 65
ns
Input instruction hold after PSEN
t
PXIX
t
PXIZ
*)
t
PXAV
*)
t
AVIV
0
0
ns
Input instruction float after PSEN
23
TCL
Lmin
-10
ns
Address valid after PSEN
28
TCL
Lmin
- 5
ns
Address to valid instruction in
140
2 CLP +
TCL
Hmin
-60
ns
Address float to PSEN
t
AZPL
0
0
ns
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