ATMEGA324P-A15MZ Atmel, ATMEGA324P-A15MZ Datasheet - Page 192

• Manufacturer Part Number: ATMEGA324P-A15MZ
• Description: MCU AVR 32KB FLASH 15MHZ 44-VQFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA324P-A15MZ

• Package / Case: 44-VQFN Exposed Pad
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 32
• Eeprom Size: 1K x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Program Memory Size: 32KB (32K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Slave Transmitter
Mode
192
ATmega32(L)
Figure 91. Formats and States in the Slave Receiver Mode
In the Slave Transmitter mode, a number of data bytes are transmitted to a master receiver (see
Figure
or are masked to zero.
Figure 92. Data Transfer in Slave Transmitter Mode
To initiate the Slave Transmitter mode, TWAR and TWCR must be initialized as follows:
TWAR
Value
SDA
SCL
92). All the status codes mentioned in this section assume that the prescaler bits are zero
Reception of the own
slave address and one or
more data bytes. All are
acknowledged
Last data byte received
is not acknowledged
Arbitration lost as master
and addressed as slave
Reception of the general call
address and one or more data
bytes
Last data byte received is
not acknowledged
Arbitration lost as master and
addressed as slave by general call
From master to slave
From slave to master
TWA6
TRANSMITTER
Device 1
SLAVE
S
TWA5
SLA
Device 2
General Call
RECEIVER
MASTER
TWA4
Device’s Own Slave Address
W
DATA
Device 3
$60
$68
$70
$78
TWA3
A
A
A
A
n
A
TWA2
DATA
DATA
........
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
TWA1
Device n
$80
$90
A
A
V
CC
DATA
DATA
TWA0
R1
$80
$88
$90
$98
A
A
A
A
TWGCE
R2
P or S
P or S
P or S
P or S
$A0
$A0
2503N–AVR–06/08