AT89LP428-20AU Atmel, AT89LP428-20AU Datasheet - Page 34

• 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 9-6.
Table 9-7.
34
Symbol
IP2D
PSP
PCC
PGP
Symbol
IP3D
PSPH
PCCH
PGPH
IP = B5H
No Bit Addressable
Bit
IP2H = B6H
Not Bit Addressable
Bit
AT89LP428/828
Function
Interrupt Priority 2 Disable. Set IP2D to 1 to disable all interrupts with priority level two. Clear to 0 to enable all interrupts
with priority level two when EA = 1.
Serial Peripheral Interface Interrupt Priority Low
Compare/Capture Array Interrupt Priority Low
General-purpose Interrupt 0 Priority Low
Function
Interrupt Priority 3 Disable. Set IP3D to 1 to disable all interrupts with priority level three. Clear to 0 to enable all
interrupts with priority level three when EA = 1.
Serial Peripheral Interface Interrupt Priority High
Compare/Capture Array Interrupt Priority High
General-purpose Interrupt 0 Priority High
IP2 – Interrupt Priority 2 Register
IP2H – Interrupt Priority 2 High Register
IP2D
IP3D
7
7
.
–
–
6
6
–
–
5
5
–
–
4
4
–
–
3
3
PSPH
PSP
2
2
Reset Value = 0xxx x000B
Reset Value = 0xxx x000B
PCCH
PCC
1
1
PGPH
3654A–MICRO–8/09
PGP
0
0