AT89LP51ED2 Atmel Corporation, AT89LP51ED2 Datasheet - Page 221

• Manufacturer Part Number: AT89LP51ED2
• Manufacturer: Atmel Corporation

Specifications of AT89LP51ED2

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 42
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 7
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 2.25
• Eeprom (bytes): 4096
• Self Program Memory: API
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 4
• Isp: SPI/OCD/UART
• Watchdog: Yes

24.6.5.2
24.6.5.3
3714A–MICRO–7/11
Power-down Sequence
ISP Start Sequence
Figure 24-22. Serial Programming Power-up Sequence
Execute this sequence to power-down the device after programming.
Figure 24-23. Serial Programming Power-down Sequence
Execute this sequence to exit CPU execution mode and enter ISP mode when the device has
passed Power-On Reset and is already operational.
1. Drive SCK low.
2. Wait at least t
3. Wait at least t
4. Wait at least t
5. Wait no more than t
1. Drive RST high.
2. Wait t
3. Drive SCK low.
4. Start programming session.
MISO
MOSI
RST
SCK
V
SS
DD
MISO
MOSI
RST
SCK
V
RLZ
SS
DD
+ t
STL
SSD
RHZ
SSZ
.
t
and tristate SCK.
SSD
and Tristate MOSI.
and drive RST low.
PWRDN
t
PWRUP
AT89LP51RD2/ED2/ID2 Preliminary
and power off VDD.
HIGH Z
HIGH Z
t
t
SSZ
POR
+ t
SUT
HIGH Z
HIGH Z
t
ZSS
t
PWRDN
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