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LZT 123 1836 27
Table 5.1-1 Pin Assignments
Pin Name Direction Function
PIN
Connection
Required
1 GND - Ground Yes
2 VCC Input DC power Yes
3 GND - Ground Yes
4 VCC Input DC power Yes
5 GND - Ground Yes
6 VCC Input DC power Yes
7 GND - Ground Yes
8 VCC Input DC power Yes
9 GND - Ground Yes
10 VCC Input DC power Yes
11 GND - Ground Yes
12 VCC Input DC power Yes
13 CHG_IN Input Battery charger power
14 SIMVCC Output 1.8V or 3.0V SIM card supply Yes
1
15 SIMRST Output SIM card reset signal Yes
1
16 SIMCLK Output SIM card clock signal Yes
1
17 SIMDAT In/Out SIM card data Yes
1
18 SIMDET Input SIM presence detection Yes
1
19 Reserved - -
20 SERVICE Input Flash programming enable signal
21 PON_H Input Device on control Yes
2
22 Reserved - -
23 Reserved - -
24 Reserved - -
25 Reserved - -
26 Reserved - -
27 ADIN1 Input ADC Input 1
28 ADIN2 Input ADC Input 2
29 ADIN3 Input ADC Input 3
30 ADIN4 Input ADC Input 4
31 VRTC Input DC supply for real time clock
32 ALARM Output RTC alarm
33 PON_L Input Device on/off control Yes
2
34 VUSB Output USB DC power Yes
3
35 USBDP In/Out USB data positive Yes
3
36 USBDN In/Out USB data negative Yes
3
37 LED1 Output LED control