AT89LP4052-20SU Atmel, AT89LP4052-20SU Datasheet - Page 74

• Manufacturer Part Number: AT89LP4052-20SU
• Description: IC 8051 MCU FLASH 4K 20SOIC
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP4052-20SU

• 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: 15
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (7.5mm Width)
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI/UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 2
• Operating Supply Voltage: 2.4 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89ISP
• Minimum Operating Temperature: - 40 C
• Package: 20SOIC W
• Device Core: 8051
• Family Name: AT89
• Maximum Speed: 20 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

23.5.1
74
AT89LP2052/LP4052
Power-up Sequence
Figure 23-21. ISP/Serial Programming Device Connections
Note:
Execute this sequence to power-up the device before serial programming.
Figure 23-22. Serial Programming Power-up Sequence
1. Apply power between VCC and GND pins.
2. Keep SCK (P1.7) and SS (P1.4) at “L”.
3. Wait 10 µs and bring RST and SS to “H”.
4. Wait at least 2 ms for internal Power-on Reset to time out.
SCK frequency should be less than 5 MHz.
MISO
MOSI
RST
SCK
V
SS
CC
Serial Clock
Serial Out
Se rial In
CS
P1.7/SCK
P1.6/MISO
P1.5/MOSI
P1.4/SS
GND
AT89LP2052/LP4052
HIGH Z
HIGH Z
VCC
RST
2.7 to 5.5V
V IH
3547J–MICRO–10/09