ATMEGA8L-8PU Atmel, ATMEGA8L-8PU Datasheet - Page 243

• Manufacturer Part Number: ATMEGA8L-8PU
• Description: IC AVR MCU 8K 8MHZ 3V 28DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8L-8PU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 8MHz
• Interface Type: SPI/TWI/USART
• Total Internal Ram Size: 1KB
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 6-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 28
• Package Type: PDIP
• Processor Series: ATMEGA8x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Minimum Operating Temperature: - 40 C
• Controller Family/series: AVR MEGA
• No. Of I/o's: 23
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• Cpu Speed: 8MHz
• Rohs Compliant: Yes
• For Use With: ATSTK600-TQFP32 - STK600 SOCKET/ADAPTER 32-TQFPATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SPI Timing
Characteristics
2486O–AVR–10/04
Figure 115. Two-wire Serial Bus Timing
See Figure 116 and Figure 117 for details.
Table 102. SPI Timing Parameters
Note:
SCL
SDA
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
t
SU;STA
5. This requirement applies to all ATmega8 Two-wire Serial Interface operation. Other
6. The actual low period generated by the ATmega8 Two-wire Serial Interface is (1/f
7. The actual low period generated by the ATmega8 Two-wire Serial Interface is (1/f
1. In SPI Programming mode the minimum SCK high/low period is:
SS high to tri-state
devices connected to the Two-wire Serial Bus need only obey the general f
requirement.
2/f
met at f
2/f
f
speed (400 kHz) with other ATmega8 devices, as well as any other device with a
proper t
SCK to out high
- 2t
- 3t
SCK high/low
SCK to SS high
SS low to SCK
CK
SCK high/low
Rise/Fall time
Rise/Fall time
SS low to out
Description
SCK period
SCK period
Out to SCK
CK
CK
SCK to out
SCK to out
CLCL
CLCL
= 8 MHz. Still, ATmega8 devices connected to the bus may communicate at full
), thus f
), thus the low time requirement will not be strictly met for f
Setup
Setup
Hold
Hold
SCL
LOW
for f
for f
= 100 kHz.
acceptance margin.
CK
CK
t
CK
HD;STA
(1)
< 12 MHz
> 12 MHz
must be greater than 6 MHz for the low time requirement to be strictly
t
t
of
LOW
Master
Master
Master
Master
Master
Master
Master
Master
Mode
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Salve
t
HIGH
t
HD;DAT
t
4 • t
2 • t
2 • t
LOW
Min
10
10
20
ck
ck
ck
t
SU;DAT
50% duty cycle
See Table 50
0.5 • t
Typ
3.6
10
10
10
10
15
15
10
SCK
ATmega8(L)
SCL
t
SU;STO
> 308 kHz when
t
Max
1.6
r
ns
t
BUF
SCL
SCL
243
SCL
-
-