AT89LP4052-20PU Atmel, AT89LP4052-20PU Datasheet - Page 61

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

Specifications of AT89LP4052-20PU

• 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-DIP (0.300", 7.62mm)
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: UART, SPI
• 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: Through Hole
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89ISP
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

23.4.1
23.4.2
3547J–MICRO–10/09
Power-up Sequence
Power-down Sequence
Execute the following sequence to power-up the device before parallel programming.
Figure 23-5. Parallel Mode Power-up Operation
Execute the following sequence to power-down the device after parallel programming.
Figure 23-6. Parallel Mode Power-down Operation
Note:
1. Apply power between VCC and GND pins.
2. After V
3. Wait 2 ms for the internal Power-on Reset to time out.
4. Bring P3.2 to “H” and then wait 10 µs.
5. Raise RST/V
6. After V
1. Tri-state P1.
2. Bring RST/V
3. Bring XTAL and P3.2 to “L”.
4. Bring RST to “L” and wait 10 µs.
5. Power off V
The waveforms on this page are not to scale.
XTAL1
XTAL1
P3.2
P3.2
RST
RST
V
V
P1
P1
CC
CC
CC
PP
has settled, wait an additional 10 µs before programming.
has settled, wait 10 µs and bring RST to “H”.
CC
PP
PP
.
down from 12V to V
to 12V to enable the parallel programming modes.
CC
HIGH Z
and wait 10 µs.
HIGH Z
AT89LP2052/LP4052
V
V
V
V
PP
IH
PP
IH
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