User's Manual

LZT 123 1836 32

Pin Name Direction Function

Connection

Required

33 PON_L Input Device on/off control Yes

34 VUSB Output USB DC power Yes

35 USBDP In/Out USB data positive Yes

36 USBDN In/Out USB data negative Yes

37 LED1 Output LED control

38 LED2 Output LED control

39 TX_ON Output Transmit indication

40 GPIO1 In/Out General purpose IO

41 GPIO2 In/Out General purpose IO

42 Reserved - -

43 GPIO3 In/Out General purpose IO

44 GPIO4 In/Out General purpose IO

45 GPIO5 In/Out General purpose IO

46 Reserved - -

47 Reserved - -

48 GPIO6 In/Out General purpose IO

49 GPIO7 In/Out General purpose IO

50 GPIO8 In/Out General purpose IO

51 GPIO9 In/Out General purpose IO

52 BUZZER Output Buzzer Output

53 RI Output Ring Indicator

54 DCD1 Output Data Carrier Detect (UART1)

55 DTR1 Input Data Terminal Ready (UART1) Yes

56 DSR1 Output Data Set Ready (UART1) Yes

57 RTS1 Input Ready To Send (UART1) Yes

58 CTS1 Output Clear To Send (UART1) Yes

59 DTM1 Input Data To Module from host (UART1) Yes

60 DFM1 Output Data From Module to host (UART1) Yes

61 RTS2 Input Ready To Send (UART2)

62 CTS2 Output Clear To Send (UART2)

63 DTM2 Input Data To Module from host (UART2)

64 DFM2 Output Data From Module to host (UART2)

65 VREF Output Core voltage reference Yes

66 PCMCLK In/Out Serial PCM clock

67 PCMFS In/Out Serial PCM frame synchronization

68 PCMDTM Input Serial PCM data to module from host