AT89LP428-20AU Atmel, AT89LP428-20AU Datasheet - Page 83

• 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

Figure 16-1. Serial Port Mode 0
3654A–MICRO–8/09
SEND
SHIFT
RXD
TXD
TI
RI
RECEIVE
SHIFT
RXD
TXD
OVERFLOW
(SHIFT CLOCK)
(SHIFT CLOCK)
(DATA OUT)
(DATA IN)
TIMER 1
WRITE TO SBUF
WRITE TO SCON (CLEAR RI)
TB8
SMOD1
1
÷2
÷2
0
0
f
osc
1
“1“
INTERNAL BUS
INTERNAL BUS
SM2
AT89LP428/828
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