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ATmega162 데이터시트(PDF) 245 Page - ATMEL Corporation

부품명 ATmega162
상세설명  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
PDF  324 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega162 데이터시트(HTML) 245 Page - ATMEL Corporation

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245
2513K–AVR–07/09
ATmega162/V
Notes:
1.
tWLRH is valid for the Write Flash, Write EEPROM, Write Fuse Bits and Write Lock Bits
commands.
2.
tWLRH_CE is valid for the Chip Erase command.
Serial
Downloading
SPI Serial
Programming Pin
Mapping
Both the Flash and EEPROM memory arrays can be programmed using the serial SPI bus while
RESET is pulled to GND. The serial interface consists of pins SCK, MOSI (input) and MISO (out-
put). After RESET is set low, the Programming Enable instruction needs to be executed first
before program/erase operations can be executed. NOTE, in Table 108 on page 245, the pin
mapping for SPI programming is listed. Not all parts use the SPI pins dedicated for the internal
SPI interface.
Figure 105. SPI Serial Programming and Verify
(1)
Note:
1. If the device is clocked by the Internal Oscillator, it is no need to connect a clock source to the
XTAL1 pin.
When programming the EEPROM, an auto-erase cycle is built into the self-timed programming
operation (in the Serial mode ONLY) and there is no need to first execute the Chip Erase
instruction. The Chip Erase operation turns the content of every memory location in both the
Program and EEPROM arrays into 0xFF.
tBVDV
BS1 Valid to DATA valid
0
250
ns
tOLDV
OE Low to DATA Valid
250
ns
tOHDZ
OE High to DATA Tri-stated
250
ns
Table 107. Parallel Programming Characteristics, V
CC = 5 V ± 10% (Continued)
Symbol
Parameter
Min
Typ
Max
Units
Table 108. Pin Mapping SPI Serial Programming
Symbol
Pins
I/O
Description
MOSI
PB5
I
Serial Data in
MISO
PB6
O
Serial Data out
SCK
PB7
I
Serial Clock
VCC
GND
XTAL1
SCK
MISO
MOSI
RESET



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