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M9328MX21ADSE User’s Manual, Rev. A
3-4 Freescale Semiconductor
32 UART3_RTS UART3 REQUEST TO SEND — Active low input signal
33 UART3_TXD UART3 TRANSMITTED DATA — Serial output signal
34 UART3_CTS UART3 CLEAR TO SEND — Active low output signal
35 USBG_RXDP USB OTG RECEIVED DATA PLUS input
36 USBG_OE_B USB OTG OUTPUT ENABLE
37 USBG_RXDM USB OTG RECEIVED DATA MINUS input
38 USBG_ON_B USB OTG transceiver ON
39 USBG_TXDP USB OTG TRANSMITTED DATA PLUS output
40 USBG_FS USB OTG FULL SPEED
41 USBG_TXDM USB OTG TRANSMITTED DATA MINUS output
42 USBG_SCL USB OTG SERIAL CLOCK
43 USBG_SDA USB OTG SERIAL DATA
44, 45, 57 P5V Swithched +5 VDC power
46 USBH1_FS USB FULL SPEED
47 USBH1_TXDP USB TRANSMITTED DATA PLUS output
48 USB_OC_B USB OVER CURRENT input low.
49 USBH1_TXDM USB TRANSMITTED DATA MINUS output
50 USBH1_OE_B USB OUTPUT ENABLE
51 USBH1_RXDP USB RECEIVED DATA PLUS input
52 USBH_ON_B USB transceiver ON
53 USBH1_RXDM USB RECEIVED DATA MINUS input
54 USB_PWR USB POWER output.
55 USB_BYP_B USB BY PASS input active low
56 USBOTG_EN Not used
58 B_DQM3_EB3_B BUFFERED ENABLE BYTE 3 — D[7:0] for SDRAM, D[31:24] for other memory types
59 TP22 Test point
60, 120 GND GROUND
61 CLK_26 26 MHz clock from TV Encoder Card
63 UART1_RTS UART1 REQUEST TO SEND — Active low input signal
64 UART1_CTS UART1 CLEAR TO SEND — Active low output signal
65 UART1_RXD UART1 RECEIVED DATA — Serial input signal
Table 3-1. CPU to Base Board PX1/PY1 Connector Signals (continued)
Pin(s) Signal Description