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AT89C5131A-RDTUM Datasheet(PDF) 7 Page - ATMEL Corporation

Part # AT89C5131A-RDTUM
Description  8-bit Flash Microcontroller with Full Speed USB Device
PDF  188 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5131A-RDTUM Datasheet(HTML) 7 Page - ATMEL Corporation

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7
4337K–USB–04/08
AT89C5130A/31A-M
Table 3-3.
Serial I/O Signal Description
CEX[4:0]
I/O
Capture External Input
Compare External Output
P1.3
P1.4
P1.5
P1.6
P1.7
Signal
Name
Type
Description
Alternate
Function
RxD
I
Serial Input Port
P3.0
TxD
O
Serial Output Port
P3.1
Table 3-4.
Timer 0, Timer 1 and Timer 2 Signal Description
Signal
Name
Type
Description
Alternate
Function
INT0
I
Timer 0 Gate Input
INT0 serves as external run control for timer 0, when selected by GATE0
bit in TCON register.
External Interrupt 0
INT0 input set IE0 in the TCON register. If bit IT0 in this register is set, bits
IE0 are set by a falling edge on INT0. If bit IT0 is cleared, bits IE0 is set by
a low level on INT0.
P3.2
INT1
I
Timer 1 Gate Input
INT1 serves as external run control for Timer 1, when selected by GATE1
bit in TCON register.
External Interrupt 1
INT1 input set IE1 in the TCON register. If bit IT1 in this register is set, bits
IE1 are set by a falling edge on INT1. If bit IT1 is cleared, bits IE1 is set by
a low level on INT1.
P3.3
T0
I
Timer Counter 0 External Clock Input
When Timer 0 operates as a counter, a falling edge on the T0 pin
increments the count.
P3.4
T1
I
Timer/Counter 1 External Clock Input
When Timer 1 operates as a counter, a falling edge on the T1 pin
increments the count.
P3.5
T2
I
O
Timer/Counter 2 External Clock Input
Timer/Counter 2 Clock Output
P1.0
T2EX
I
Timer/Counter 2 Reload/Capture/Direction Control Input
P1.1
Signal
Name
Type
Description
Alternate
Function



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