參數(shù)資料
型號(hào)： W78E51C
廠商： WINBOND ELECTRONICS CORP
英文描述： 8 bit micocontroller
中文描述： 8位micocontroller
文件頁數(shù)： 12/23頁
文件大?。?/td> 302K
代理商： W78E51C
W78E51C
- 12 -
7.2 MOVC Inhibit
This bit is used to restrict the accessible region of the MOVC instruction. It can prevent the MOVC
instruction in external program memory from reading the internal program code. When this bit is set to
logic 0, a MOVC instruction in external program memory space will be able to access code only in the
external memory, not in the internal memory. A MOVC instruction in internal program memory space
will always be able to access the ROM data in both internal and external memory. If this bit is logic 1,
there are no restrictions on the MOVC instruction.
7.3 Encryption
This bit is used to enable/disable the encryption logic for code protection. Once encryption feature is
enabled, the data presented on port 0 will be encoded via encryption logic. Only whole chip erase will
reset this bit.
8. ELECREICAL CHARACTERISTICS
8.1 Absolute Maximum Ratings
PARAMETER
SYMBOL
V
DD
V
SS
V
IN
T
A
MIN.
-0.3
V
SS
-0.3
0
MAX.
+7.0
V
DD
+0.3
70
UNIT
V
V
°
C
°
C
DC Power Supply
Input Voltage
Operating Temperature
Storage Temperature
T
ST
-55
+150
Note:
Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability
of the device.
8.2 D.C. Characteristics
V
CC
V
SS
= 5V
±
10%, T
A
= 25
°
C, unless otherwise specified.
SPECIFICATION
MIN.
4.5
-
-
PARAMETER
SYMBOL
TEST CONDITIONS
MAX.
5.5
20
6
UNIT
Operating Voltage
Operating Current
Idle Current
V
DD
I
DD
I
IDLE
V
mA
mA
No load V
DD
= 5.5V
Idle mode V
DD
= 5.5V
Power-down mode
V
DD
= 5.5V
V
DD
= 5.5V
V
IN
= 0V or V
DD
V
DD
= 5.5V
V
IN
= 2.0V
(*1)
Power Down Current
I
PWDN
-
50
μ
A
Input Current
P1, P2, P3, P4
Logical 1-to-0 Transition
Current P1, P2, P3
(*1)
, P4
Input Current
RST
(*2)
I
IN1
-50
+10
μ
A
I
TL
-550
-
μ
A
I
IN2
V
DD
= 5.5V
V
IN
= V
DD
-10
+300
μ
A
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