895132-IL 데이터 시트보기 (PDF) - Atmel Corporation
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895132-IL Datasheet PDF : 182 Pages
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4173E–USB–09/07
AT89C5132
Signal
Name
P2.7:0
Type
I/O
Description
Port 2
P2 is an 8-bit bidirectional I/O port with internal pull-ups.
P3.7:0
I/O
Port 3
P3 is an 8-bit bidirectional I/O port with internal pull-ups.
P4.7:0
P5.3:0
I/O
Port 4
P4 is an 8-bit bidirectional I/O port with internal pull-ups.
I/O
Port 5
P5 is a 4-bit bidirectional I/O port with internal pull-ups.
Alternate
Function
A15:8
RXD
TXD
INT0
INT1
T0
T1
WR
RD
MISO
MOSI
SCK
SS
-
Table 2. Clock Signal Description
Signal
Name
X1
X2
FILT
Type
I
O
I
Description
Input to the on-chip inverting oscillator amplifier
To use the internal oscillator, a crystal/resonator circuit is connected to this pin.
If an external oscillator is used, its output is connected to this pin. X1 is the
clock source for internal timing.
Output of the on-chip inverting oscillator amplifier
To use the internal oscillator, a crystal/resonator circuit is connected to this pin.
If an external oscillator is used, leave X2 unconnected.
PLL Low Pass Filter input
FILT receives the RC network of the PLL low pass filter.
Alternate
Function
-
-
-
Table 3. Timer 0 and Timer 1 Signal Description
Signal
Name
INT0
INT1
Type
I
I
Description
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 sets IE0 in the TCON register. If bit IT0 in this register is set, bit IE0
is set by a falling edge on INT0. If bit IT0 is cleared, bit IE0 is set by a low level
on INT0.
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 sets IE1 in the TCON register. If bit IT1 in this register is set, bit IE1
is set by a falling edge on INT1. If bit IT1 is cleared, bit IE1 is set by a low level
on INT1.
Alternate
Function
P3.2
P3.3
5
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