參數(shù)資料
型號(hào)： MQ83C154DCXXX-25P883D
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQFP44
封裝： CERAMIC, QFP-44
文件頁數(shù)： 8/176頁
文件大?。?/td> 2962K
代理商： MQ83C154DCXXX-25P883D
105
2535J–AVR–08/10
ATtiny13
17.6 Serial Programming
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). See Figure 17-1.
Figure 17-1. Serial Programming and Verify
Note:
If clocked by internal oscillator there is no need to connect a clock source to the CLKI pin.
After RESET is set low, the Programming Enable instruction needs to be executed first before
program/erase operations can be executed.
Note:
In Table 17-7 above, the pin mapping for SPI programming is listed. Not all parts use the SPI pins
dedicated for the internal SPI interface.
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.
Depending on CKSEL fuses, a valid clock must be present. The minimum low and high periods
for the serial clock (SCK) input are defined as follows:
Low: > 2 CPU clock cycles for fck < 12 MHz, 3 CPU clock cycles for fck >= 12 MHz
High: > 2 CPU clock cycles for fck < 12 MHz, 3 CPU clock cycles for fck >= 12 MHz
Table 17-7.
Pin Mapping Serial Programming
Symbol
Pins
I/O
Description
MOSI
PB0
I
Serial Data in
MISO
PB1
O
Serial Data out
SCK
PB2
I
Serial Clock
VCC
GND
SCK
MISO
MOSI
RESET
+1.8 - 5.5V
PB0
PB1
PB2
PB5
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