at89lp2052-20xi ATMEL Corporation, at89lp2052-20xi Datasheet - Page 2

• Manufacturer Part Number: at89lp2052-20xi
• Description: At89lp2052 8-bit Microcontroller With 2/4-kbyte Flash
• Manufacturer: ATMEL Corporation

2. Pin Configuration
2.1
2
20-lead PDIP/SOIC/TSSOP
AT89LP2052/LP4052
The two timer/counters in the AT89LP2052/LP4052 are enhanced with two new modes. Mode 0
can be configured as a variable 9- to 16-bit timer/counter and Mode 1 can be configured as a
16-bit auto-reload timer/counter. In addition both timer/counters may be configured as 8-bit
Pulse Width Modulators with 8-bit prescalers.
The I/O ports of the AT89LP2052/LP4052 can be independently configured in one of four oper-
ating modes. In quasi-bidirectional mode, the ports operate as in the classic 8051. In input
mode, the ports are tri-stated. Push-pull output mode provides full CMOS drivers and open-drain
mode provides just a pull-down.
(INT0) P3.2
(INT1) P3.3
(RXD) P3.0
(VPP) RST
(TXD) P3.1
(T0) P3.4
(T1) P3.5
XTAL2
XTAL1
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VCC
P1.7 (SCK)
P1.6 (MISO)
P1.5 (MOSI)
P1.4 (SS)
P1.3
P1.2
P1.1 (AIN1)
P1.0 (AIN0)
P3.7 (SYSCLK)
3547H–MICRO–5/07