attiny24v ATMEL Corporation, attiny24v Datasheet - Page 163

• Manufacturer Part Number: attiny24v
• Description: 8-bit Avr Microcontroller With 2/4/8k Bytes Insystem Programmable Flash
• Manufacturer: ATMEL Corporation

19.5
8006H–AVR–10/09
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 19-1. Serial Programming and Verify
Note:
After RESET is set low, the Programming Enable instruction needs to be executed first before
program/erase operations can be executed.
Table 19-10. Pin Mapping Serial Programming
Note:
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
If clocked by internal oscillator there is no need to connect a clock source to the CLKI pin.
In
pins dedicated for the internal SPI interface.
Symbol
MOSI
MISO
Figure 19-1
SCK
Table 19-10
MOSI
MISO
SCK
above, the pin mapping for SPI programming is listed. Not all devices use the SPI
below.
Pins
PA6
PA5
PA4
RESET
GND
I/O
O
VCC
I
I
+1.8 - 5.5V
ATtiny24/44/84
Description
Serial Data in
Serial Data out
Serial Clock
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