em78p809n ELAN Microelectronics Corp, em78p809n Datasheet - Page 28
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em78p809n
Manufacturer Part Number
em78p809n
Description
8-bit Microcontroller
Manufacturer
ELAN Microelectronics Corp
Datasheet
1.EM78P809N.pdf
(75 pages)
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EM78P809N
8-Bit Microcontroller
24 •
INT1NR
Bit 7
IOC6 ~ IOC9 − I/O Port Control Register
INTCR − INT Control Register ( Address : 0Bh )
Bit 7 ( INT1NR ) : INT1 noise reject time select
Bit 6 ( INT0EN ) : INT0 enable control
Bit 5 : Reserved
Bit 4 ~ Bit 3 ( INT3ES1 ~ INT3ES0) : INT3 edge select
Bit 2 : Reserved
Bit 1 ( INT1ES ) : INT1 edge select
Bit 0 (TC2ES) : Timer/Counter 2 edge select.
INT3ES1
0
0
1
1
"1" puts the relative I/O pin into high impedance, while "0" defines the relative
IOC6 and IOC9 registers are both readable and writable.
TC2ES = “0” : Rising edge
TC2ES = “1” : Falling edge
I/O pin as output.
INT1NR = “0” : Pulses less than 63/fc are eliminated as noise
INT1NR = “1” : Pulses less than 15/fc are eliminated as noise
INT0EN = “0” : General I/O
INT0EN = “1” : /INT0 pin
INT1ES = “0” : Rising edge
INT1ES = “1” : Falling edge
INT0EN
Bit 6
INT3ES0
Bit 5
0
0
1
0
1
INT3ES1
Bit 4
(This specification is subject to change without further notice)
INT3ES0
Bit 3
Product Specification (V1.0) 07.26.2005
Bit 2
Edge Select
Both edge
Reserved
0
Falling
Rising
INT1ES
Bit 1
TC2ES
Bit 0
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