LZT 123 1836
28
Pin Name
Direction Function
PIN
Connection
Required
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)
56 DSR1
Output Data Set Ready (UART1)
57 RTS1
Input
Ready To Send (UART1)
Yes
5
58 CTS1
Output Clear To Send (UART1)
Yes
5
59 DTM1
Input
Data To Module from host (UART1)
Yes
4
60 DFM1
Output Data From
Module to host (UART1)
Yes
4
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
69 PCMDFM
Output Serial PCM data from module to host
70 SSPCLK
In/Out SPI clock
71 SSPFS
In/Out SPI frame synchronization
72 SSPDTM
Input SPI data
to module from host
73 SSPDFM
Output SPI data to host from module
74 MMCCLK
Output SD/MMC card clock
75 MMCCMD
In/Out SD/MMC card command/response
76 MMCDAT0
In/Out SD/MMC card data 0
