We can Break ic flash ATMEGA461P Flash, please view the IC ATMEGA461P features for your reference:

The SPI Data Register is a read/write register used for data transfer between the Register File and the SPI Shift Register. Writing to the register initiates data transmission when Break ic flash.

Reading the register causes the Shift Register Receive buffer to be read. There are four combinations of SCK phase and polarity with respect to serial data, which are determined by control bits CPHA and CPOL. The SPI data transfer formats are shown in Figure 81 and Figure 82 if Break ic flash.

Data bits are shifted out and latched in on opposite edges of the SCK signal, ensuring sufficient time for data signals to stabilize. This is clearly seen by summarizing Table 94 and Table 95, as done below before Break ic flash:

The Universal Synchronous and Asynchronous serial Receiver and Transmitter (USART) is a highly flexible serial communication device. The main features are:

Full Duplex Operation (Independent Serial Receive and Transmit Registers)

Asynchronous or Synchronous Operation

Master or Slave Clocked Synchronous Operation

High Resolution Baud Rate Generator

Supports Serial Frames with 5, 6, 7, 8, or 9 Data Bits and 1 or 2 Stop Bits

Odd or Even Parity Generation and Parity Check Supported by Hardware if Break ic flash

Data OverRun Detection

Framing Error Detection

Noise Filtering Includes False Start Bit Detection and Digital Low Pass Filter

Three Separate Interrupts on TX Complete, TX Data Register Empty and RX Complete

Multi-processor Communication Mode

Double Speed Asynchronous Communication ModeThe ATmega461p has four USART’s, USART0, USART1, USART2, and USART3. The functionality for all four USART’s is described below Break ic flash.

USART0, USART1, USART2, and USART3 have different I/O registers as shown in “Register Summary” on page 385.

A simplified block diagram of the USART Transmitter is shown in Figure 83 on page after Break ic flash

CPU accessible I/O Registers and I/O pins are shown in bold.

The Power Reducion USART0 bit, PRUSART0, in “Power Reduction Register 0  PRR0” on page 54 must be disabled by writing a logical zero to it when Break ic flash.

The Power Reducion USART1 bit, PRUSART1, in “Power Reduction Register 1 – PRR1” on page 55 must be disabled by writing a logical zero to it.

The Power Reducion USART2 bit, PRUSART2, in “Power Reduction Register 1 – PRR1” on page 55 must be disabled by writing a logical zero to it if Break ic flash.

The Power Reducion USART3 bit, PRUSART3, in “Power Reduction Register 1 – PRR1” on page 55 must be disabled by writing a logical zero to it.

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