AT89C5131A-M Atmel Corporation, AT89C5131A-M Datasheet - Page 9

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AT89C5131A-M

Manufacturer Part Number
AT89C5131A-M
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of AT89C5131A-M

Flash (kbytes)
32 Kbytes
Max. Operating Frequency
48 MHz
Cpu
8051-12C
Max I/o Pins
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
1
Twi (i2c)
1
Uart
1
Sram (kbytes)
1.25
Eeprom (bytes)
1024
Self Program Memory
API
Operating Voltage (vcc)
2.7 to 5.5
Timers
4
Isp
UART/USB
Watchdog
Yes
4337K–USB–04/08
Table 3-8.
Table 3-9.
Signal
XTAL1
XTAL2
P0[7:0]
P1[7:0]
P2[7:0]
P3[7:0]
P4[1:0]
Name
Signal
Name
PLLF
Ports Signal Description
Clock Signal Description
Type
Type
O
I/O
I/O
I/O
I/O
I/O
I
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.
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 XTAL2 unconnected.
PLL Low Pass Filter input
Receive the RC network of the PLL low pass filter.
Description
Port 0
P0 is an 8-bit open-drain bidirectional I/O port. Port 0
pins that have 1s written to them float and can be used
as high impedance inputs. To avoid any parasitic current
consumption, Floating P0 inputs must be pulled to V
V
Port 1
P1 is an 8-bit bidirectional I/O port with internal pull-ups.
Port 2
P2 is an 8-bit bidirectional I/O port with internal pull-ups.
Port 3
P3 is an 8-bit bidirectional I/O port with internal pull-ups.
Port 4
P4 is an 2-bit open drain port.
SS
.
AT89C5130A/31A-M
DD
or
Alternate Function
CEX[4:0]
LED[3:0]
KIN[7:0]
AD[7:0]
A[15:8]
T2EX
INT0
INT1
SCL
SDA
RxD
TxD
ECI
WR
RD
T2
T0
T1
Alternate
Function
-
-
-
9

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