AT89LP428-20MU ATMEL [ATMEL Corporation], AT89LP428-20MU Datasheet - Page 4

• Manufacturer Part Number: AT89LP428-20MU
• Description: 8-bit Microcontroller with 4K/8K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Table 1-1.
4
TQFP
/MLF
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Pin Number
PLCC
AT89LP428/828
21
22
23
24
25
26
27
28
29
30
31
32
1
2
3
4
AT89LP428/828 Pin Description (Continued)
PDIP
N/A
N/A
19
20
21
22
23
24
25
26
27
28
1
2
3
4
Symbol
VCC
P1.1
P1.2
P4.3
P4.2
P1.3
P1.4
P1.5
P1.6
P1.7
P2.6
P2.7
P2.5
P2.4
P3.0
P3.1
Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
P4.3: User-configurable I/O Port 4 bit 3.
P4.2: User-configurable I/O Port 4 bit 2.
Description
P1.1: User-configurable I/O Port 1 bit 1.
T2EX: Timer 2 External Capture/Reload Input.
GPI1: General-purpose Interrupt input 1.
P1.2: User-configurable I/O Port 1 bit 2.
GPI2: General-purpose Interrupt input 2.
Supply Voltage.
P1.3: User-configurable I/O Port 1 bit 3.
GPI3: General-purpose Interrupt input 3.
P1.4: User-configurable I/O Port 1 bit 4.
SS: SPI Slave-select.
GPI6: General-purpose Interrupt input 4.
P1.5: User-configurable I/O Port 1 bit 5.
MOSI: SPI master-out/slave-in. When configured as master, this pin is an output.
When configured as slave, this pin is an input.
GPI5: General-purpose Interrupt input 5.
P1.6: User-configurable I/O Port 1 bit 6.
MISO: SPI master-in/slave-out. When configured as master, this pin is an input.
When configured as slave, this pin is an output.
GPI6: General-purpose Interrupt input 6.
P1.7: User-configurable I/O Port 1 bit 7.
SCK: SPI Clock. When configured as master, this pin is an output. When
configured as slave, this pin is an input.
GPI7: General-purpose Interrupt input 7.
P2.6: User-configurable I/O Port 2 bit 6.
AIN2: Analog Input 2.
P2.7: User-configurable I/O Port 2 bit 7.
AIN3: Analog Input 3.
P2.5: User-configurable I/O Port 2 bit 5.
AIN1: Analog Input 1.
P2.4: User-configurable I/O Port 2 bit 5.
AIN0: Analog Input 0.
P3.0: User-configurable I/O Port 3 bit 0.
RXD: Serial Port Receiver Input.
P3.1: User-configurable I/O Port 3 bit 1.
TXD: Serial Port Transmitter Output.
3654A–MICRO–8/09