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ZIOL2201 Datasheet(PDF) 15 Page - Renesas Technology Corp |
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ZIOL2201 Datasheet(HTML) 15 Page - Renesas Technology Corp |
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15 / 92 page  ZIOL2xxx Datasheet © 2016 Integrated Device Technology, Inc. 15 April 26, 2016 In order to gain optimal EMC behavior the slew rate of the output signals of both drivers can be adjusted. The input threshold levels of the receiver can be set to ratiometric or to IO-Link conform levels, which enables the IC to be used in applications having a wide supply voltage range. The configuration of the transceiver can be changed during operation. After power-on this configuration is automatically loaded from the on-chip EEPROM. Driver and receiver are kept totally separated, so full duplex mode in data communication systems is supported. The ability to enable/disable the drivers output also enables applications in half duplex mode, where output and input are connected. Having the I/O-pins separated also enables additional external input filtering. The COM channel send and receive signals (TX_EN, TX, RX) are multiplexed with the signals of the SPI functional unit of the IC (SPI_CLK, MOSI, MISO) as shown in Figure 3.2. The SPI unit is used for IC configuration and diagnostic purposes (refer to chapter 3.3.8). As long the SPI unit is active (SPI_EN_L = low), the send status of the COM channel is kept (for information refer to chapter 3.3.8 and Figure 3.10). Figure 3.3 ZIOL22xx Transceiver Data Path in Principle Device Legend: AF: Analog Filter (on/off configurable) CS: Current Sink (on/off/strength configurable) DF: Digital Filter (on/off configurable) I1, I2: Transmit/Receive Data Inverter (on/off configurable) L: Data Latch, stores channel transmit status SPI: Serial Peripheral Interface Analog Block Digital Block AF AUX_I AUX_O TX_EN/ SPI_CLK TX/ MOSI RX/ MISO COM_O COM_I AUX_TX AUX_EN AUX_RX Single channel transceiver COM SPI SPI_EN_L DF I2 CLK I1 Device DF I2 I1 CS ZIOL22xx Data Path RST_L INT_L WURQ_L Control MOSI MISO L L Conf.Reg[7][7:5] S0 S1 S2 S3 A B B B A B A A C EN TX RX OUT IN n.c. n.c. n.c. n.c. |
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