AT89LP213 Atmel Corporation, AT89LP213 Datasheet - Page 75
AT89LP213
Manufacturer Part Number
AT89LP213
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT89LP213.pdf
(98 pages)
Specifications of AT89LP213
Flash (kbytes)
2 Kbytes
Max. Operating Frequency
20 MHz
Cpu
8051-1C
Max I/o Pins
14
Spi
1
Sram (kbytes)
0.125
Operating Voltage (vcc)
2.4 to 5.5
Timers
2
Isp
SPI/OCD
Watchdog
Yes
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23.8.5
3538E–MICRO–11/10
Serial Peripheral Interface
The Serial Peripheral Interface (SPI) is a byte-oriented full duplex synchronous serial communi-
cation channel. During In-System programming the programmer always acts as the SPI master
and the target device always acts as the SPI slave. The target device receives serial data on
MOSI and outputs serial data on MISO. The Programming Interface implements a standard
SPI Port with a fixed data order and For In-System programming, bytes are transferred MSB first
as shown in
CPHA = 0) where bits are sampled on the rising edge of SCK and output on the falling edge of
SCK. For more detailed timing information see
Figure 23-9. ISP Byte Sequence
Figure 23-10. Serial Programming Interface Timing
MISO
MOSI
SCK
SS
MOSI
MISO
SCK
Figure
t
SSE
23-9. The SCK phase and polarity follow SPI clock mode 0 (CPOL = 0,
t
SOE
7
7
t
SHSL
6
6
t
SCK
Data Sampled
t
5
5
t
SLSH
SR
t
SOV
Figure
4
4
t
SOH
23-10.
3
3
t
AT89LP213/214
SF
2
2
t
SIS
1
1
t
SIH
t
SSD
0
0
t
SOX
75
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