AT89LP428-20AU Atmel, AT89LP428-20AU Datasheet - Page 45

• Manufacturer Part Number: AT89LP428-20AU
• Description: MCU 8051 4K FLASH SPI 32TQFP
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP428-20AU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 30
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Processor Series: AT89x
• Core: 8051
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89ISP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

Table 11-2.
3654A–MICRO–8/09
Symbol
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
TCON = 88H
Bit Addressable
Bit
Function
Timer 1 Overflow Flag. Set by hardware on Timer/Counter overflow. Cleared by hardware when the processor vectors
to interrupt routine.
Timer 1 Run Control Bit. Set/cleared by software to turn Timer/Counter on/off.
Timer 0 Overflow Flag. Set by hardware on Timer/Counter overflow. Cleared by hardware when the processor vectors
to interrupt routine.
Timer 0 Run Control Bit. Set/cleared by software to turn Timer/Counter on/off.
Interrupt 1 Edge Flag. Set by hardware when external interrupt edge detected. Cleared when interrupt processed.
Interrupt 1 Type Control Bit. Set/cleared by software to specify falling edge/low level triggered external interrupts.
Interrupt 0 Edge Flag. Set by hardware when external interrupt edge detected. Cleared when interrupt processed.
Interrupt 0 Type Control Bit. Set/cleared by software to specify falling edge/low level triggered external interrupts.
TCON
TF1
7
– Timer/Counter Control Register
TR1
6
TF0
5
TR0
4
IE1
3
IT1
2
Reset Value = 0000 0000B
AT89LP428/828
IE0
1
IT0
0
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