W78E516B Datasheet, PDF (13/26 Pages) Winbond – 8-BIT MICROCONTROLLER

W78E516B
Oscillator Control
W78E516B/E516 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
PARAMETER
SYMBOL
MIN.
MAX.
UNIT
DC Power Supply
VDD−VSS
-0.3
+6.0
V
Input Voltage
VIN
VSS -0.3
VDD +0.3
V
Operating Temperature
TA
0
70
°C
Storage Temperature
TST
-55
+150
°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
(VDD-VSS = 5V ±10%, TA = 25°C, Fosc = 20 MHz, unless otherwise specified.)
PARAMETER
SYM.
SPECIFICATION
MIN. MAX. UNIT
Operating Voltage
VDD
4.5
5.5
V
Operating Current
IDD
-
20
mA
Idle Current
IIDLE
-
6
mA
Power Down Current
IPWDN
-
50
µA
Input Current
P1, P2, P3, P4
Input Current
RST
Input Leakage Current
P0, EA
Logic 1 to 0 Transition Current
P1, P2, P3, P4
Input Low Voltage
P0, P1, P2, P3, P4, EA
IIN1
-50
+10
µA
IIN2
-10
+300
µA
ILK
-10
+10
µA
ITL^[*4]
-500
-
µA
VIL1
0
0.8
V
TEST CONDITIONS
RST = 1, P0 = VDD
No load
VDD = 5.5V
Idle mode
VDD = 5.5V
Power-down mode
VDD = 5.5V
VDD = 5.5V
VIN = 0V or VDD
VDD = 5.5V
0< VIN <VDD
VDD = 5.5V
0V< VIN < VDD
VDD = 5.5V
VIN = 2.0V
VDD = 4.5V
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Publication Release Date: February 2000
Revision A3