W78ERD2 Datasheet, PDF (57/72 Pages) Winbond – 8-BIT MICROCONTROLLER

W78ERD2
W78ERD2 allow user to diminish the gain of on-chip oscillator amplifier by using programmer to set
the bit B7 of option bits 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.
17. ELECTRICAL CHARACTERISTICS
17.1 Absolute Maximum Ratings
PARAMETER
DC Power Supply
Input Voltage
Operating Temperature
Storage Temperature
SYMBOL
VDD − VSS
VIN
TA
TST
MIN.
-0.3
VSS -0.3
0
-55
MAX.
+6.0
VDD +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.
17.2 D.C. Characteristics
(VDD − VSS = 5V ±10%, TA = 25°C, Fosc = 20 MHz, unless otherwise specified.)
PARAMETER
Operating Voltage
SYM.
VDD
SPECIFICATION
MIN.
MAX. UNIT
4.5
5.5
V
Operating Current
IDD
-
20
mA
Idle Current
Power Down Current
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
IIDLE
IPWDN
IIN1
IIN2
ILK
ITL^[*4]
VIL1
-
-
-50
0
-10
-500
0
10
mA
10
µA
+10
µA
+300
µA
+10
µA
-
µA
0.8
V
TEST CONDITIONS
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: April 20, 2005
Revision A4