ATMEGA48P-20MMUR Atmel, ATMEGA48P-20MMUR Datasheet - Page 231
![MCU AVR 4K FLASH 20MHZ 28QFN](/photos/12/32/123209/28m1-vqfn_sml.jpg)
ATMEGA48P-20MMUR
Manufacturer Part Number
ATMEGA48P-20MMUR
Description
MCU AVR 4K FLASH 20MHZ 28QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA168P-20AU.pdf
(420 pages)
Specifications of ATMEGA48P-20MMUR
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
4KB (2K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
512 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
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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21.7.3
8025L–AVR–7/10
Slave Receiver Mode
Figure 21-14. Formats and States in the Master Receiver Mode
In the Slave Receiver mode, a number of data bytes are received from a Master Transmitter
(see
are zero or are masked to zero.
Figure 21-15. Data transfer in Slave Receiver mode
SDA
SCL
Figure
Successfull
reception
from a slave
receiver
Next transfer
started with a
repeated start
condition
Not acknowledge
received after the
slave address
Arbitration lost in slave
address or data byte
Arbitration lost and
addressed as slave
21-15). All the status codes mentioned in this section assume that the prescaler bits
From master to slave
From slave to master
$08
S
Device 1
RECEIVER
SLAVE
SLA
TRANSMITTER
R
Device 2
MASTER
MR
A or A
DATA
$40
$48
$38
$68
A
A
A
$78
Other master
Other master
n
continues
continues
P
$B0
Device 3
DATA
A
Any number of data bytes
and their associated acknowledge bits
This number (contained in TWSR) corresponds
to a defined state of the 2-Wire Serial Bus. The
prescaler bits are zero or masked to zero
........
ATmega48P/88P/168P
$50
$38
To corresponding
states in slave mode
A
A
Other master
DATA
continues
Device n
$58
A
V
CC
$10
P
R
S
R1
SLA
R2
W
R
MT
231
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