ATMEGA48V-10PI Atmel, ATMEGA48V-10PI Datasheet - Page 198
![IC AVR MCU 4K 5V 10MHZ 28-DIP](/photos/7/21/72189/453-28-dip_sml.jpg)
ATMEGA48V-10PI
Manufacturer Part Number
ATMEGA48V-10PI
Description
IC AVR MCU 4K 5V 10MHZ 28-DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA48V-10PI
Core Processor
AVR
Core Size
8-Bit
Speed
10MHz
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)
1.8 V ~ 5.5 V
Data Converters
A/D 6x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
ATMEGA48V-12PI
ATMEGA48V-12PI
ATMEGA48V-12PI
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Part Number:
ATMEGA48V-10PI
Manufacturer:
AGERE
Quantity:
85
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20. USART in SPI Mode
20.1
20.2
20.3
198
Features
Overview
Clock Generation
ATmega48/88/168
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The Universal Synchronous and Asynchronous serial Receiver and Transmitter (USART) can be
set to a master SPI compliant mode of operation. Setting both UMSELn1:0 bits to one enables
the USART in Master SPI Mode (MSPIM) logic. In this mode of operation the SPI master control
logic takes direct control over the USART resources. These resources include the transmitter
and receiver shift register and buffers, and the baud rate generator. The parity generator and
checker, the data and clock recovery logic, and the RX and TX control logic is disabled. The
USART RX and TX control logic is replaced by a common SPI transfer control logic. However,
the pin control logic and interrupt generation logic is identical in both modes of operation.
The I/O register locations are the same in both modes. However, some of the functionality of the
control registers changes when using MSPIM.
The Clock Generation logic generates the base clock for the Transmitter and Receiver. For
USART MSPIM mode of operation only internal clock generation (that is, master operation) is
supported. The Data Direction Register for the XCKn pin (DDR_XCKn) must therefore be set to
one (that is, as output) for the USART in MSPIM to operate correctly. Preferably the DDR_XCKn
should be set up before the USART in MSPIM is enabled (that is, TXENn and RXENn bit set to
one).
The internal clock generation used in MSPIM mode is identical to the USART synchronous mas-
ter mode. The baud rate or UBRRn setting can therefore be calculated using the same
equations, see
Full Duplex, Three-wire Synchronous Data Transfer
Master Operation
Supports all four SPI Modes of Operation (Mode 0, 1, 2, and 3)
LSB First or MSB First Data Transfer (Configurable Data Order)
Queued Operation (Double Buffered)
High Resolution Baud Rate Generator
High Speed Operation (fXCKmax = fCK/2)
Flexible Interrupt Generation
Table
20-1:
2545S–AVR–07/10
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