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型號(hào)：	S80C52CXXX-12SHXXX
廠商：	TEMIC SEMICONDUCTORS
元件分類：	微控制器/微處理器
英文描述：	8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQCC44
文件頁(yè)數(shù)：	541/1021頁(yè)
文件大?。?/td>	15196K
代理商：	S80C52CXXX-12SHXXX

32072H–AVR32–10/2012

AT32UC3A3

Transmit Character Repetition

The USART can be configured to automatically re-send a character if it receives a NACK. Writ-

ing a non-zero value to MR.MAX_ITERATION will enable and determine the number of

consecutive re-transmissions. If the number of unsuccessful re-transmissions equals

MAX_ITERATION, the iteration bit (CSR.ITER) is set. An interrupt request is generated if the

ITER bit in the Interrupt Mask Register (IMR.ITER) is set. Writing a one to the Reset Iteration bit

(CR.RSTIT) will clear CSR.ITER.

Disable Successive Receive NACK

The receiver can limit the number of consecutive NACKs to the value in MR.MAX_ITERATION.

This is enabled by writing a one to the Disable Successive NACK bit (MR.DSNACK). If the num-

ber of NACKs is about to exceed MR.MAX_ITERATION, the character will instead be accepted

as valid and CSR.ITER is set.

IrDA Mode

The USART features an IrDA mode, supporting asynchronous, half-duplex, point-to-point wire-

less communication. It embeds the modulator and demodulator, allowing for a glueless

connection to the infrared transceivers, as shown in Figure 25-24. The IrDA mode is enabled by

writing 0x8 to MR.MODE. This activates the IrDA specification v1.1 compliant modem. Data

transfer speeds ranging from 2.4Kbit/s to 115.2Kbit/s are supported and the character format is

fixed to one start bit, eight data bits, and one stop bit.

Figure 25-24. Connection to IrDA Transceivers

The receiver and the transmitter must be exclusively enabled or disabled, according to the direc-

tion of the transmission. To receive IrDA signals, the following needs to be done:

Disable TX and enable RX.

Configure the TXD pin as an I/O, outputting zero to avoid LED activation. Disable the internal

pull-up for improved power consumption.

Receive data.

Transceivers

相關(guān)PDF資料	PDF描述
SC80C52XXX-12SV	8-BIT, MROM, 12 MHz, MICROCONTROLLER, CDIP40
S80C32XXX-40R	8-BIT, 40 MHz, MICROCONTROLLER, PQCC44
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SD80C32EXXX-30SC	8-BIT, 30 MHz, MICROCONTROLLER, CDIP40
S80C52XXX-12SHXXX:R	8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQCC44

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
S80C52T-12	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C52T-16	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C52T-20	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C52T-25	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C52T-30	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller

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