HT827A0 データシートの表示（PDF） - Holtek Semiconductor
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HT827A0 Datasheet PDF : 49 Pages
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HT827A0
Pad No. Pad Name I/O
Mask
Option
Description
13~20
PD0~PD7
Bidirectional 8-bit input/output ports
I/O
Pull-high
or None
Software instructions determine the CMOS output or
schmitt trigger input with or without a pull-high resistor
(mask option).
6
VSS
¾
¾
Negative power supply, ground
7~10
PE0~PE3
Bidirectional 8-bit input/output ports
I/O
Pull-high
or None
Software instructions determine the CMOS output or
schmitt trigger input with or without a pull-high resistor
(mask option).
11
INT
External interrupt schmitt trigger input with a
I
¾
pull-high resistor
Edge triggered is activated on a high to low transition.
12
TMR
I
¾
Schmitt trigger input for a timer/event counter
29
AUD
O
¾
Audio output for driving an external transistor
PMOS open drain output
30
RES
I
¾
Schmitt trigger reset input, active low
31
VDD
¾
¾
Positive power supply
32
OSC1
33
OSC2
OSC1 and OSC2 connect to an RC network or crystal os-
I
O
Crystal or
RC
cillator (determined by mask option) for an internal sys-
tem clock. In the case of RC operation, an oscillation
resistor connects to OSC1. OSC2 is the output terminal
of a 1/4 system clock.
Absolute Maximum Ratings
Supply Voltage..............................-0.3V to 5.5V
Input Voltage .................VSS-0.3V to VDD+0.3V
Storage Temperature.................-50°C to 125°C
Operating Temperature ..............-25°C to 70°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-
mum Ratings² may cause substantial damage to the device. Functional operation of this de-
vice at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.
5
March 15, 2000
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