ht827a0 Holtek Semiconductor Inc., ht827a0 Datasheet - Page 7

• Manufacturer Part Number: ht827a0
• Description: 8-bit Microcontroller With Voice Rom
• Manufacturer: Holtek Semiconductor Inc.

A.C. Characteristics
Note: t
f
f
f
t
t
t
t
t
Symbol
SYS1
SYS2
TIMER
WDTOSC
WDT1
WDT2
RES
INT
SYS
=1/(f
System Clock (Crystal OSC)
System Clock (RC OSC)
Timer I/P Frequency (TMR)
Watchdog Oscillator
Watchdog Timeout Period (RC)
Watchdog Timeout Period
(System Clock)
External Reset Low Pulse Width 5V
Interrupt Pulse Width
SYS
)
Parameter
V
3V
5V
3V
5V
3V
5V
5V
5V
5V
5V
DD
Test Conditions
7
Without WDT
prescaler
Without WDT
prescaler
Conditions
¾
¾
¾
¾
¾
¾
¾
¾
¾
Min.
400
400
400
400
31
¾
0
0
8
1
1
Typ.
1024
78
20
¾
¾
¾
¾
¾
¾
¾
¾
Max. Unit
March 15, 2000
4000
4000
4000
4000
4000
4000
140
36
HT827A0
¾
¾
¾
Ta=25°C
kHz
kHz
kHz
kHz
kHz
kHz
t
ms
SYS
ms
ms
ms