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型號(hào)：	E5550F-DOW
廠商：	TEMIC SEMICONDUCTORS
元件分類：	通信及網(wǎng)絡(luò)
英文描述：	SPECIALTY TELECOM CIRCUIT, UUC7
封裝：	DIE-7
文件頁(yè)數(shù)：	725/1069頁(yè)
文件大?。?/td>	14303K
代理商：	E5550F-DOW

SAM4CP [DATASHEET]

43051E–ATPL–08/14

The default configuration values of the optical link circuitries allow the 38 kHz modulation, a 50% duty cycle and an idle

polarity allowing a direct drive of an IR LED through a resistor (see

Figure 35-13 on page 725

Refer to the Electrical Characteristics section for drive capability of the buffer associated with the UTXD output.

In case of direct drive of the IR LED as shown in

Figure 35-13 on page 725

, the PIO must be programmed in multi-driver

mode (open-drain). To do so, the adequate index and values must be programmed into the PIO Multi-driver Enable

Input/Output Controller (PIO) section for details.

If an off-chip current amplifier is used to drive the transmitting of the IR LED, the PIO may be programmed in default drive

mode (non open-drain) for the line index driving the UTXD output, or in open-drain mode depending on the type of

external circuitry.

Figure 35-13. Optical Interface Connected to IR Components

35.5.5 Peripheral DMA Controller (PDC)

Both the receiver and the transmitter of the UART are connected to a PDC.

The PDC channels are programmed via registers that are mapped within the UART user interface from the offset 0x100.

The status bits are reported in UART_SR and generate an interrupt.

The RXRDY bit triggers the PDC channel data transfer of the receiver. This results in a read of the data in UART_RHR.

The TXRDY bit triggers the PDC channel data transfer of the transmitter. This results in a write of data in UART_THR.

35.5.6 Test Modes

The UART supports three test modes. These modes of operation are programmed by using the CHMODE field in

The automatic echo mode allows bit-by-bit retransmission. When a bit is received on the URXD line, it is sent to the

UTXD line. The transmitter operates normally, but has no effect on the UTXD line.

The local loopback mode allows the transmitted characters to be received. UTXD and URXD pins are not used and the

output of the transmitter is internally connected to the input of the receiver. The URXD pin level has no effect and the

UTXD line is held high, as in idle state.

The remote loopback mode directly connects the URXD pin to the UTXD line. The transmitter and the receiver are

disabled and have no effect. This mode allows a bit-by-bit retransmission.

PIO_MDSR [UTXD]

PhotoTransistor

相關(guān)PDF資料	PDF描述
E5551A-DIT	SPECIALTY TELECOM CIRCUIT, UUC7
E5551A-DOW	SPECIALTY TELECOM CIRCUIT, UUC7
E5551A-FP008	SPECIALTY TELECOM CIRCUIT, PDSO8
E5551A-FP008	SPECIALTY TELECOM CIRCUIT, PDSO8
E5551A-DOW	SPECIALTY TELECOM CIRCUIT, UUC7

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
E5550F-S8	制造商:未知廠家制造商全稱:未知廠家功能描述:Transponder
E5551A-DIT	制造商:未知廠家制造商全稱:未知廠家功能描述:Transponder
E5551A-DOW	制造商:未知廠家制造商全稱:未知廠家功能描述:Transponder
E5551A-FP008	制造商:未知廠家制造商全稱:未知廠家功能描述:TRANSPONDER\|CMOS\|SOP\|8PIN\|PLASTIC
E5552	制造商:未知廠家制造商全稱:未知廠家功能描述:Transponder

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