IC AVR MCU 4K 10MHZ 1.8V 32-QFN

ATMEGA48V-10MU

Manufacturer Part NumberATMEGA48V-10MU
DescriptionIC AVR MCU 4K 10MHZ 1.8V 32-QFN
ManufacturerAtmel
SeriesAVR® ATmega
ATMEGA48V-10MU datasheets
 


Specifications of ATMEGA48V-10MU

Core ProcessorAVRCore Size8-Bit
Speed10MHzConnectivityI²C, SPI, UART/USART
PeripheralsBrown-out Detect/Reset, POR, PWM, WDTNumber Of I /o23
Program Memory Size4KB (2K x 16)Program Memory TypeFLASH
Eeprom Size256 x 8Ram Size512 x 8
Voltage - Supply (vcc/vdd)1.8 V ~ 5.5 VData ConvertersA/D 8x10b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Package / Case32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFNPackage32MLF EP
Device CoreAVRFamily NameATmega
Maximum Speed10 MHzOperating Supply Voltage2.5|3.3|5 V
Data Bus Width8 BitNumber Of Programmable I/os23
Interface TypeSPI/TWI/USARTOn-chip Adc8-chx10-bit
Number Of Timers3Processor SeriesATMEGA48x
CoreAVR8Data Ram Size512 B
Maximum Clock Frequency10 MHzMaximum Operating Temperature+ 85 C
Mounting StyleSMD/SMT3rd Party Development ToolsEWAVR, EWAVR-BL
Minimum Operating Temperature- 40 CController Family/seriesAVR MEGA
No. Of I/o's23Eeprom Memory Size256Byte
Ram Memory Size512ByteCpu Speed10MHz
No. Of Timers3Rohs CompliantYes
For Use WithATSTK600-TQFP32 - STK600 SOCKET/ADAPTER 32-TQFPATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEMLead Free Status / RoHS StatusLead free / RoHS Compliant
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Page 235/378

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• Two or more masters are accessing different slaves. In this case, arbitration will occur in the
SLA bits. Masters trying to output a one on SDA while another Master outputs a zero will lose
the arbitration. Masters losing arbitration in SLA will switch to Slave mode to check if they are
being addressed by the winning Master. If addressed, they will switch to SR or ST mode,
depending on the value of the READ/WRITE bit. If they are not being addressed, they will
switch to not addressed Slave mode or wait until the bus is free and transmit a new START
condition, depending on application software action.
This is summarized in
Figure 21-21. Possible Status Codes Caused by Arbitration
21.9
Register Description
21.9.1
TWBR – TWI Bit Rate Register
Bit
(0xB8)
Read/Write
Initial Value
• Bits 7..0 – TWI Bit Rate Register
TWBR selects the division factor for the bit rate generator. The bit rate generator is a frequency
divider which generates the SCL clock frequency in the Master modes. See
Unit” on page 215
21.9.2
TWCR – TWI Control Register
Bit
(0xBC)
Read/Write
Initial Value
The TWCR is used to control the operation of the TWI. It is used to enable the TWI, to initiate a
Master access by applying a START condition to the bus, to generate a Receiver acknowledge,
to generate a stop condition, and to control halting of the bus while the data to be written to the
bus are written to the TWDR. It also indicates a write collision if data is attempted written to
TWDR while the register is inaccessible.
2545S–AVR–07/10
Figure
21-21. Possible status values are given in circles.
START
SLA
Arbitration lost in SLA
Own
No
Address / General Call
received
Yes
Write
Direction
Read
7
6
5
TWBR7
TWBR6
TWBR5
R/W
R/W
R/W
0
0
0
for calculating bit rates.
7
6
5
TWINT
TWEA
TWSTA
R/W
R/W
R/W
0
0
0
ATmega48/88/168
Data
Arbitration lost in Data
38
TWI bus will be released and not addressed slave mode will be entered
A START condition will be transmitted when the bus becomes free
68/78
Data byte will be received and NOT ACK will be returned
Data byte will be received and ACK will be returned
Last data byte will be transmitted and NOT ACK should be received
Data byte will be transmitted and ACK should be received
B0
4
3
2
1
TWBR4
TWBR3
TWBR2
TWBR1
R/W
R/W
R/W
R/W
0
0
0
0
4
3
2
1
TWSTO
TWWC
TWEN
R/W
R
R/W
R
0
0
0
0
STOP
0
TWBR0
TWBR
R/W
0
“Bit Rate Generator
0
TWIE
TWCR
R/W
0
235