AT89LP52-20MU Atmel, AT89LP52-20MU Datasheet - Page 109

• 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
3709B–MICRO–12/10
1
2
3
4
5
6
7
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 6
Memory Organization ............................................................................ 10
Special Function Registers ................................................................... 23
Enhanced CPU ....................................................................................... 24
System Clock ......................................................................................... 28
Reset ....................................................................................................... 31
.................................................................................................................... 3
1.1
1.2
1.3
1.4
1.5
2.1
2.2
3.1
3.2
3.3
3.4
5.1
5.2
5.3
6.1
6.2
6.3
6.4
7.1
7.2
7.3
7.4
7.5
40-lead PDIP .....................................................................................................2
44-lead TQFP ....................................................................................................2
44-lead PLCC ....................................................................................................3
44-pad VQFN/QFN/MLF ....................................................................................3
Pin Description ..................................................................................................4
Block Diagram ...................................................................................................7
Comparison to AT89S51/52 ..............................................................................7
Program Memory .............................................................................................10
Internal Data Memory ......................................................................................12
External Data Memory .....................................................................................13
In-Application Programming (IAP) ...................................................................22
Fast Mode ........................................................................................................24
Compatibility Mode ..........................................................................................25
Enhanced Dual Data Pointers .........................................................................25
Crystal Oscillator .............................................................................................28
External Clock Source .....................................................................................29
Internal RC Oscillator ......................................................................................29
System Clock Divider ......................................................................................30
Power-on Reset ...............................................................................................31
Brown-out Reset ..............................................................................................32
External Reset .................................................................................................32
Watchdog Reset ..............................................................................................33
Software Reset ................................................................................................33
AT89LP51/52 - Preliminary
i