AT89LP52-20MU Atmel, AT89LP52-20MU Datasheet - Page 39

• 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 9-2.
Table 9-3.
Table 9-4.
3709B–MICRO–12/10
Symbol
EA
ET2
ES
ET1
EX1
ET0
EX0
Symbol
PT2
PS
PT1
PX1
PT0
PX0
Symbol
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
IE = A8H
Bit Addressable
Bit
IP = B8H
Bit Addressable
Bit
IPH = B7H
Not Bit Addressable
Bit
Function
Global enable/disable. All interrupts are disabled when EA = 0. When EA = 1, each interrupt source is enabled/disabled by setting
/clearing its own enable bit.
Timer 2 Interrupt Enable
Serial Port Interrupt Enable
Timer 1 Interrupt Enable
External Interrupt 1 Enable
Timer 0 Interrupt Enable
External Interrupt 0 Enable
Function
Timer 2 Interrupt Priority Low
Serial Port Interrupt Priority Low
Timer 1 Interrupt Priority Low
External Interrupt 1 Priority Low
Timer 0 Interrupt Priority Low
External Interrupt 0 Priority Low
Function
Timer 2 Interrupt Priority High
Serial Port Interrupt Priority High
Timer 1 Interrupt Priority High
External Interrupt 1 Priority High
Timer 0 Interrupt Priority High
External Interrupt 0 Priority High
IE – Interrupt Enable Register
IP – Interrupt Priority Register
IPH – Interrupt Priority High Register
EA
–
–
7
7
7
–
–
–
6
6
6
PT2H
ET2
PT2
5
5
5
PSH
ES
PS
4
4
4
PT1H
ET1
PT1
3
3
3
AT89LP51/52 - Preliminary
PX1H
EX1
PX1
2
2
2
Reset Value = 0000 0000B
Reset Value = 0000 0000B
Reset Value = 0000 0000B
PT0H
ET0
PT0
1
1
1
PX0H
EX0
PX0
0
0
0
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