AT89LP428 Atmel Corporation, AT89LP428 Datasheet - Page 123
AT89LP428
Manufacturer Part Number
AT89LP428
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT89LP428.pdf
(149 pages)
Specifications of AT89LP428
Flash (kbytes)
4 Kbytes
Max. Operating Frequency
25 MHz
Cpu
8051-1C
Max I/o Pins
30
Spi
1
Uart
1
Sram (kbytes)
0.75
Eeprom (bytes)
512
Self Program Memory
IAP
Operating Voltage (vcc)
2.4 to 5.5
Timers
3
Isp
SPI/OCD
Watchdog
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89LP428-20AU
Manufacturer:
RFMD
Quantity:
1 240
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23.9.2
3654A–MICRO–8/09
Power-down Sequence
Figure 23-5. Serial Programming Power-up Sequence
Execute this sequence to power-down the device after programming.
Figure 23-6. Serial Programming Power-down Sequence
1. Drive SCK low.
2. Wait at least t
3. Tristate MOSI.
4. Wait at least t
5. Wait no more than t
MISO
MOSI
MISO
MOSI
SCK
RST
V
RST
SCK
V
SS
CC
SS
CC
t
SSD
SSD
SSZ
and then tristate SS and SCK.
and bring SS high.
PWRDN
t
PWRUP
and power off V
t
SSZ
HIGH Z
HIGH Z
HIGH Z
HIGH Z
t
POR
+ t
cc
.
SUT
t
PWRDN
t
ZSS
AT89LP428/828
123
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