ATMEGA128A-MN Atmel, ATMEGA128A-MN Datasheet - Page 215
![IC MCU AVR 128K FLASH 64VQFN](/photos/12/13/121332/313-64-tqfp_sml.jpg)
ATMEGA128A-MN
Manufacturer Part Number
ATMEGA128A-MN
Description
IC MCU AVR 128K FLASH 64VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA128A-MN
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
128KB (64K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP
Core
AVR8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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21.7.2
8151H–AVR–02/11
Master Receiver Mode
Figure 21-12. Formats and States in the Master Transmitter Mode
In the Master Receiver Mode, a number of data bytes are received from a slave transmitter (see
Figure
mat of the following address packet determines whether Master Transmitter or Master Receiver
mode is to be entered. If SLA+W is transmitted, MT mode is entered, if SLA+R is transmitted,
MR mode is entered. All the status codes mentioned in this section assume that the prescaler
bits are zero or are masked to zero.
Successfull
transmission
to a slave
receiver
Next transfer
started with a
repeated start
condition
Not acknowledge
received after the
slave address
Not acknowledge
received after a data
byte
Arbitration lost in slave
address or data byte
Arbitration lost and
addressed as slave
21-13). In order to enter a Master mode, a START condition must be transmitted. The for-
From master to slave
From slave to master
$08
S
SLA
W
MT
A or A
DATA
$18
$20
$38
$68
A
A
A
$78
Other master
Other master
n
continues
continues
P
$B0
DATA
A
Any number of data bytes
and their associated acknowledge bits
This number (contained in TWSR) corresponds
to a defined state of the Two-wire Serial Bus. The
prescaler bits are zero or masked to zero
A or A
$28
$30
$38
To corresponding
states in slave mode
A
A
Other master
$10
continues
P
R
P
S
ATmega128A
SLA
W
R
MR
215
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