ATMEGA8-16AU Atmel, ATMEGA8-16AU Datasheet - Page 230
![IC AVR MCU 8K 16MHZ 5V 32TQFP](/photos/6/91/69154/313-32-tqfp_sml.jpg)
ATMEGA8-16AU
Manufacturer Part Number
ATMEGA8-16AU
Description
IC AVR MCU 8K 16MHZ 5V 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8-16AU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-TQFP, 32-VQFP
For Use With
ATSTK600-TQFP32 - STK600 SOCKET/ADAPTER 32-TQFPATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1005 - ISP 4PORT FOR ATMEL AVR MCU JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Serial
Downloading
Serial
Programming Pin
Mapping
230
ATmega8(L)
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
programming is listed. Not all parts use the SPI pins dedicated for the internal SPI interface.
Table 96. Pin Mapping Serial Programming
Figure 112. Serial Programming and Verify
Notes:
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 f
High:> 2 CPU clock cycles for f
Symbol
1. If the device is clocked by the Internal Oscillator, it is no need to connect a clock source to the
2. V
MOSI
MISO
SCK
XTAL1 pin
CC
- 0.3 <
AV
CC
< V
Pins
PB4
PB3
PB5
ck
CC
ck
MOSI
MISO
SCK
<12MHz, 3 CPU clock cycles for f
<12MHz, 3 CPU clock cycles for f
+ 0.3, however,
PB3
PB4
PB5
XTAL1
RESET
GND
I/O
(1)
O
I
I
AV
CC
AVCC
Description
Serial data in
Serial data out
Serial clock
VCC
should always be within 2.7V - 5.5V
+2.7V - 5.5V
+2.7V - 5.5V
Table
(2)
ck
ck
96, the pin mapping for SPI
>=12MHz
>=12MHz
2486Z–AVR–02/11
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