ATMEGA8535-16PU Atmel, ATMEGA8535-16PU Datasheet - Page 173
ATMEGA8535-16PU
Manufacturer Part Number
ATMEGA8535-16PU
Description
IC AVR MCU 8K 16MHZ 5V 40DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets
1.ATMEGA8535L-8AU.pdf
(22 pages)
2.ATMEGA8535L-8AU.pdf
(321 pages)
3.ATMEGA8535-16PU.pdf
(317 pages)
Specifications of ATMEGA8535-16PU
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
32
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 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
40-DIP (0.600", 15.24mm)
Processor Series
ATMEGA8x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
2-Wire, SPI, USART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
4.5 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
A/d Inputs
8-Channel, 10-Bit
Cpu Speed
16 MIPS
Eeprom Memory
512 Bytes
Input Output
32
Interface
SPI/TWI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
40-pin PDIP
Programmable Memory
8K Bytes
Timers
2-8-bit, 1-16-bit
Voltage, Range
4.5-5.5 V
Controller Family/series
AVR MEGA
No. Of I/o's
32
Eeprom Memory Size
512Byte
Ram Memory Size
512Byte
Rohs Compliant
Yes
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA8535-16PU
Manufacturer:
ATMEL
Quantity:
1 500
Part Number:
ATMEGA8535-16PU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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Electrical Interconnection
Data Transfer and Frame
Format
Transferring Bits
START and STOP Conditions
2502G–AVR–04/05
As depicted in Figure 76, both bus lines are connected to the positive supply voltage
through pull-up resistors. The bus drivers of all TWI-compliant devices are open-drain or
open-collector. This implements a wired-AND function which is essential to the opera-
tion of the interface. A low level on a TWI bus line is generated when one or more TWI
devices output a zero. A high level is output when all TWI devices tri-state their outputs,
allowing the pull-up resistors to pull the line high. Note that all AVR devices connected to
the TWI bus must be powered in order to allow any bus operation.
The number of devices that can be connected to the bus is only limited by the bus
capacitance limit of 400 pF and the 7-bit slave address space. A detailed specification of
the electrical characteristics of the TWI is given in “Two-wire Serial Interface Character-
istics” on page 257. Two different sets of specifications are presented there, one
relevant for bus speeds below 100 kHz, and one valid for bus speeds up to 400 kHz.
Each data bit transferred on the TWI bus is accompanied by a pulse on the clock line.
The level of the data line must be stable when the clock line is high. The only exception
to this rule is for generating start and stop conditions.
Figure 77. Data Validity
The Master initiates and terminates a data transmission. The transmission is initiated
when the Master issues a START condition on the bus, and it is terminated when the
Master issues a STOP condition. Between a START and a STOP condition, the bus is
considered busy, and no other Master should try to seize control of the bus. A special
case occurs when a new START condition is issued between a START and STOP con-
dition. This is referred to as a REPEATED START condition, and is used when the
Master wishes to initiate a new transfer without relinquishing control of the bus. After a
REPEATED START, the bus is considered busy until the next STOP. This is identical to
the START behavior, and therefore START is used to describe both START and
REPEATED START for the remainder of this datasheet, unless otherwise noted. As
depicted below, START and STOP conditions are signalled by changing the level of the
SDA line when the SCL line is high.
SDA
SCL
Data Stable
Data Change
Data Stable
ATmega8535(L)
173
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