AT89LP428-20AU Atmel, AT89LP428-20AU Datasheet - Page 146

• 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

8
9
10 I/O Ports .................................................................................................. 35
11 Enhanced Timer 0 and Timer 1 with PWM ........................................... 41
12 Enhanced Timer 2 .................................................................................. 52
13 Compare/Capture Array ........................................................................ 61
14 External Interrupts ................................................................................. 74
15 General-purpose Interrupts .................................................................. 74
16 Serial Interface (UART) .......................................................................... 77
Power Saving Modes ............................................................................. 26
Interrupts ................................................................................................ 29
8.1
8.2
9.1
9.2
10.1
10.2
10.3
10.4
11.1
11.2
11.3
11.4
11.5
12.1
12.2
12.3
12.4
12.5
13.1
13.2
13.3
13.4
16.1
Idle Mode .........................................................................................................26
Power-down Mode ...........................................................................................27
Interrupt Response Time .................................................................................31
Interrupt Registers ...........................................................................................32
Port Configuration ............................................................................................35
Port 2 Analog Functions ..................................................................................38
Port Read-Modify-Write ...................................................................................39
Port Alternate Functions ..................................................................................39
Mode 0 – Variable Width Timer/Counter .........................................................42
Mode 1 – 16-bit Auto-Reload Timer/Counter ...................................................42
Mode 2 – 8-bit Auto-Reload Timer/Counter .....................................................43
Mode 3 – 8-bit Split Timer ...............................................................................44
Pulse Width Modulation ...................................................................................47
Timer 2 Registers ............................................................................................53
Capture Mode ..................................................................................................55
Auto-Reload Mode ...........................................................................................55
Baud Rate Generator ......................................................................................59
Frequency Generator (Programmable Clock Out) ...........................................60
CCA Registers .................................................................................................62
Input Capture Mode .........................................................................................65
Output Compare Mode ....................................................................................66
Pulse Width Modulation Mode .........................................................................68
Multiprocessor Communications .....................................................................77
3654A–MICRO–8/09