AT89LP428-20AU Atmel, AT89LP428-20AU Datasheet - Page 32

• 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

9.2
Table 9-2.
Table 9-3.
32
Symbol
EA
EC
ET2
ES
ET1
EX1
ET0
EX0
Symbol
IP0D
PC
PT2
PS
PT1
PX1
PT0
PX0
IE = A8H
Bit Addressable
Bit
IP = B8H
Bit Addressable
Bit
Interrupt Registers
AT89LP428/828
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.
Comparator Interrupt Enable
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
Interrupt Priority 0 Disable. Set IP0D to 1 to disable all interrupts with priority level zero. Clear to 0 to enable all interrupts
with priority level zero when EA = 1.
Comparator Interrupt Priority Low
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
IE – Interrupt Enable Register
IP – Interrupt Priority Register
IP0D
EA
7
7
PC
EC
6
6
ET2
PT2
5
5
ES
PS
4
4
ET1
PT1
3
3
EX1
PX1
2
2
Reset Value = 0000 0000B
Reset Value = 0000 0000B
ET0
PT0
1
1
3654A–MICRO–8/09
EX0
PX0
0
0