AT89LP52-20MU Atmel, AT89LP52-20MU Datasheet - Page 110

• Manufacturer Part Number: AT89LP52-20MU
• Description: IC MCU 8051 8K FLASH SPI 44VQFN
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP52-20MU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-VFQFN Exposed Pad
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: Serial
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

Table of Contents (Continued)
ii
AT89LP51/52 - Preliminary
8
9
10 I/O Ports .................................................................................................. 40
11 Timer 0 and Timer 1 ............................................................................... 45
12 Timer 2 .................................................................................................... 50
13 External Interrupts ................................................................................. 56
14 Serial Interface (UART) .......................................................................... 56
Power Saving Modes ............................................................................. 33
Interrupts ................................................................................................ 36
8.1
8.2
8.3
9.1
10.1
10.2
10.3
11.1
11.2
11.3
11.4
11.5
12.1
12.2
12.3
12.4
12.5
14.1
14.2
14.3
14.4
14.5
14.6
14.7
Idle Mode .........................................................................................................33
Power-down Mode ...........................................................................................34
Reducing Power Consumption ........................................................................36
Interrupt Response Time .................................................................................37
Port Configuration ............................................................................................40
Port Read-Modify-Write ...................................................................................43
Port Alternate Functions ..................................................................................44
Mode 0 – 13-bit Timer/Counter ........................................................................46
Mode 1 – 16-bit Timer/Counter ........................................................................46
Mode 2 – 8-bit Auto-Reload Timer/Counter .....................................................47
Mode 3 – 8-bit Split Timer ...............................................................................47
Clock Output (Pin Toggle Mode) .....................................................................48
Timer 2 Registers ............................................................................................51
Capture Mode ..................................................................................................52
Auto-Reload Mode ...........................................................................................52
Baud Rate Generator ......................................................................................54
Frequency Generator (Programmable Clock Out) ...........................................55
Multiprocessor Communications .....................................................................58
Baud Rates ......................................................................................................58
Framing Error Detection ..................................................................................60
Automatic Address Recognition ......................................................................60
More About Mode 0 .........................................................................................62
More About Mode 1 .........................................................................................68
More About Modes 2 and 3 .............................................................................70
3709B–MICRO–12/10