Phytec phyCORE-i.MX 6, Hardware Manual

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phyCORE
®
-i.MX 6 [PCM-058]
34 ©
PHYTEC Messtechnik GmbH 2016 L-808e_2
9 Serial Interfaces
The phyCORE-i.MX 6 provides numerous dedicated serial interfaces some of which are
equipped with a transceiver to allow direct connection to external devices:
1. Two High speed UARTs (TTL, derived from UART2 and UART3 of the i.MX 6) with up to 4
MHz and one with hardware flow control (RTS and CTS signals)
2. High speed USB OTG interface (extended directly from the i.MX 6’s USB OTG PHY
(USBPHY1))
3. High speed USB HOST interface (extended directly from the i.MX 6 USB HOST PHY
(USBPHY2))
4. Auto-MDIX enabled 10/100/1000 Mbit Ethernet interface
5. One I
2
C interface (derived from I
2
C port 1 of the i.MX 6)
6. Two Serial Peripheral Interface (SPI) interface (extended from the first and second
SPI module (eCSPI1 and eCSPI2) of the i.MX 6)
7. I
2
S audio interface (originating from the i.MX 6’s Synchronous Serial Interface (SSI)
and muxed through port 5 of the Digital Audio Multiplexer (AUDMUX5))
8. CAN 2.0B interface (extended directly from the i.MX 6 FlexCAN1 module)
9. SATA II, 3.0 Gbps (extended directly from the i.MX 6 SATA PHY)
10. PCI Express Gen. 2.0 (extended directly from the i.MX 6 PCIe PHY)
The following sections of this chapter detail each of these serial interfaces and any
applicable configuration jumpers.
9.1 Universal Asynchronous Interface
The phyCORE-i.MX 6 provides two high speed universal asynchronous interfaces with up to
4 MHz and one with additional hardware flow control (RTS and CTS signals). The following
table shows the location of the signals on the phyCORE-Connector.
Pin # Signal ST Voltage Domain Description
X1A17 X_UART2_RX_DATA I VDD_3V3_LOGIC UART2 serial data receive
X1B21 X_UART2_TX_DATA O VDD_3V3_LOGIC UART2 serial transmit signal
X1A18 X_UART3_RX_DATA I VDD_3V3_LOGIC UART3 serial data receive
X1A19 X_UART3_CTS_B O VDD_3V3_LOGIC UART3 clear to send output
X1A20 X_UART3_RTS_B I VDD_3V3_LOGIC UART3 request to send input
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X1B18 X_UART3_TX_DATA O VDD_3V3_LOGIC UART3 serial transmit signal
Table 12: Location of the UART Signals
The signals extend from UART2 respectively UART3 of the i.MX 6 directly to the phyCORE-
Connector without conversion to RS-232 level. External RS-232 transceivers must be
attached by the user if RS-232 levels are required.
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: Special care must be taken not to override the device configuration when using this pin as input ( section 6.2 ).