AT89LP4052 Atmel Corporation, AT89LP4052 Datasheet - Page 92

• Manufacturer Part Number: AT89LP4052
• Manufacturer: Atmel Corporation

Specifications of AT89LP4052

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 15
• Spi: 1
• Uart: 1
• Sram (kbytes): 0.25
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 2
• Isp: SPI
• Watchdog: Yes

Table of Contents (Continued)
ii
AT89LP2052/LP4052
13. Power Saving Modes ............................................................................. 14
14. Interrupts ................................................................................................ 16
15. I/O Ports .................................................................................................. 20
16. Enhanced Timer/Counters .................................................................... 24
17. External Interrupts ................................................................................. 30
18. Serial Interface ....................................................................................... 31
12.3 External Reset .....................................................................................................14
12.4 Watchdog Reset ..................................................................................................14
13.1 Idle Mode .............................................................................................................15
13.2 Power-down Mode ..............................................................................................15
14.1 Interrupt Response Time .....................................................................................17
15.1 Quasi-bidirectional Output ...................................................................................20
15.2 Input-only Mode ...................................................................................................21
15.3 Open-drain Output ...............................................................................................22
15.4 Push-pull Output ..................................................................................................22
15.5 Port 1 Analog Functions ......................................................................................22
15.6 Port Read-Modify-Write .......................................................................................23
15.7 Port Alternate Functions ......................................................................................23
16.1 Mode 0 ................................................................................................................24
16.2 Mode 1 ................................................................................................................25
16.3 Mode 2 ................................................................................................................26
16.4 Mode 3 ................................................................................................................26
16.5 Pulse Width Modulation .......................................................................................29
16.6 Timer/Counter Pin Configuration .........................................................................30
18.1 Multiprocessor Communications .........................................................................31
18.2 Baud Rates ..........................................................................................................33
18.3 More About Mode 0 .............................................................................................34
18.4 More About Mode 1 .............................................................................................36
18.5 More About Modes 2 and 3 .................................................................................38
18.6 Framing Error Detection ......................................................................................41
18.7 Automatic Address Recognition ..........................................................................41
3547J–MICRO–10/09