AT89LP428-20AU Atmel, AT89LP428-20AU Datasheet - Page 147

• 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

3654A–MICRO–8/09
17 Enhanced Serial Peripheral Interface .................................................. 91
18 Dual Analog Comparators ..................................................................... 98
19 Programmable Watchdog Timer ......................................................... 105
20 Instruction Set Summary .................................................................... 107
21 Register Index ...................................................................................... 111
22 On-chip Debug System ....................................................................... 113
23 Programming the Flash Memory ........................................................ 115
16.2
16.3
16.4
16.5
16.6
16.7
17.1
17.2
17.3
17.4
17.5
18.1
18.2
18.3
19.1
22.1
22.2
22.3
23.1
23.2
23.3
23.4
23.5
23.6
23.7
Baud Rates ......................................................................................................79
More About Mode 0 .........................................................................................81
More About Mode 1 .........................................................................................85
More About Modes 2 and 3 .............................................................................87
Framing Error Detection ..................................................................................90
Automatic Address Recognition ......................................................................90
Master Operation .............................................................................................93
Slave Operation ...............................................................................................94
Pin Configuration .............................................................................................95
Serial Clock Timing ..........................................................................................96
SPI Registers ...................................................................................................97
Analog Input Muxes .......................................................................................100
Internal Reference Voltage ............................................................................100
Comparator Interrupt Debouncing .................................................................100
Software Reset ..............................................................................................106
Physical Interface ..........................................................................................113
Software Breakpoints ....................................................................................114
Limitations of On-chip Debug ........................................................................114
Physical Interface ..........................................................................................115
Memory Organization ....................................................................................116
Command Format ..........................................................................................117
Status Register ..............................................................................................120
DATA Polling .................................................................................................120
Flash Security ................................................................................................120
User Configuration Fuses ..............................................................................121