參數(shù)資料
型號: W78E62B
廠商: WINBOND ELECTRONICS CORP
元件分類: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 19/34頁
文件大小: 393K
代理商: W78E62B
W78E62B
Publication Release Date: June 1999
- 19 -
Revision A1
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.
Oscillator Control
W78E62B allow user to diminish the gain of on-chip oscillator amplifier by using programmer to set
the bit B7 of security register. Once B7 is set to 0, a half of gain will be decreased. Care must be
taken if user attempts to diminish the gain of oscillator amplifier, reducing a half of gain may
improperly affect the external crystal operation at high frequency above 24 MHz. The value of R and
C1,C2 may need some adjustment while running at lower gain.
ABSOLUTE MAXIMUM RATINGS
ITEM
1
2
3
4
SYMBOL
V
DD
V
SS
V
IN
T
A
T
ST
PARAMETER
DC Power Supply
Input Voltage
Operating Temperature
Storage Temperature
MIN.
-0.3
V
SS
-0.3
0
-55
MAX.
+6.0
V
DD
+0.3
70
+150
UNIT
V
V
°
C
°
C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability
of the device.
D.C. ELECTRICAL CHARACTERISTICS
(V
DD
-V
SS
= 5V
±
10%, T
A
= 25
°
C, Fosc = 20 MHz, unless otherwise specified.)
SYMBOL
PARAMETER
SPECIFICATION
MIN.
MAX.
4.5
-
TEST CONDITIONS
UNIT
V
mA
V
DD
I
DD
Operating Voltage
Operating Current
5.5
20
RST = 1, P0 = V
DD
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
0<V
IN
<V
DD
I
IDLE
Idle Current
-
6
mA
I
PWDN
Power Down Current
-
50
μ
A
I
IN1
Input Current
P1, P2, P3, P4
Input Current RST
-50
+10
μ
A
I
IN2
-10
+300
μ
A
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