ATMEGA48P-20MMUR Atmel, ATMEGA48P-20MMUR Datasheet - Page 416
![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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8025L–AVR–7/10
18 SPI – Serial Peripheral Interface ......................................................... 164
19 USART0 ................................................................................................. 174
20 USART in SPI Mode ............................................................................. 202
17.3Timer/Counter Clock Sources .............................................................................143
17.4Counter Unit ........................................................................................................143
17.5Output Compare Unit ..........................................................................................144
17.6Compare Match Output Unit ................................................................................146
17.7Modes of Operation .............................................................................................147
17.8Timer/Counter Timing Diagrams .........................................................................151
17.9Asynchronous Operation of Timer/Counter2 .......................................................153
17.10Timer/Counter Prescaler ...................................................................................154
17.11Register Description ..........................................................................................156
18.1Features ..............................................................................................................164
18.2Overview .............................................................................................................164
18.3SS Pin Functionality ............................................................................................169
18.4Data Modes .........................................................................................................169
18.5Register Description ............................................................................................171
19.1Features ..............................................................................................................174
19.2Overview .............................................................................................................174
19.3Clock Generation .................................................................................................175
19.4Frame Formats ....................................................................................................178
19.5USART Initialization ............................................................................................180
19.6Data Transmission – The USART Transmitter ....................................................181
19.7Data Reception – The USART Receiver .............................................................184
19.8Asynchronous Data Reception ............................................................................188
19.9Multi-processor Communication Mode ................................................................191
19.10Register Description ..........................................................................................193
19.11Examples of Baud Rate Setting ........................................................................197
20.1Features ..............................................................................................................202
20.2Overview .............................................................................................................202
20.3Clock Generation .................................................................................................202
20.4SPI Data Modes and Timing ...............................................................................203
20.5Frame Formats ....................................................................................................204
20.6Data Transfer ......................................................................................................206
20.7AVR USART MSPIM vs. AVR SPI ......................................................................208
ATmega48P/88P/168P
iv
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