MeiG_SLM550_Hardware Design Manual
MeiG Smart Technology Co., Ltd
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GPIO6_TP_I2C3_SDA
48
General purpose I2C, default for TP
GPIO7_TP_I2C3_SCL
47
GPIO0
167
Universal I2C
GPIO1
168
Note:
To use the 2.2KΩ pull-up resistor to 1.8V.
Gpio109 / 110 can only be used to connect sensor devices in Qualcomm QVL, no other devices.
4.14 Analog to Digital Converter (ADC)
The SLM550 module provides two MPP function signals from the power management chip: PWM
(29PIN) and ADC (128PIN), MPP can be configured as an ADC or PWM signal.
The ADC signal is 16 bit resolution, and its performance parameters are as follows:
Table 15 ADC Performance Parameters
Description
Minimum
Typical
Maximum
Unit
Input Voltage Range
-
1.8
-
V
ADC Resolution
-
-
15
bits
Analog Input Bandwidth
-
500
-
kHz
Sampling Frequency
-
4.8
-
MHz
INL
-
-
±8
LSB
DNL
-
-
±4
LSB
Offset error
-
-
±1
%
Gain error
-
-
±1
%
4.15 PWM
The PWM pin can be used as a backlight adjustment for the LCD to adjust the backlight brightness by
adjusting the duty cycle.