MeiG Smart product technical information
SLM758
Hardware Design Guide
Page 58
4.15 Analog to Digital Converter (ADC)
The SLM758 module provides three MPP function signals from the power
management
chip:
PMI8953_MPP1
(4PIN)
and
PM8953_MPP2
(112PIN),
PM8953_MPP4 (209PIN) MPP can be configured as an ADC or PWM signal. Note:
PM8953_MPP2 and PM8953_MPP4 cannot be configured as PWM functions at the
same time.
The ADC signal is 16 bit resolution, and its performance parameters are as follows:
Table 4.12: ADC Performance Parameters
Description
Minimum
Typical
Maximum
Unit
Input
V
oltage
R
ange
-
1.8
-
V
ADC Resolution
-
-
15
bits
Analog
I
nput
B
andwidth
-
100
-
kHz
Sampling
F
requency
-
2.4
-
MHz
INL
-
-
±8
LSB
DNL
-
-
±4
LSB
Offset error
-
-
±1
%
Gain error
-
-
±1
%
4.16. PWM
The PWM pin can be used as a backlight adjustment for the LCD to adjust the backlight
brightness by adjusting the duty cycle.
4.17. Motor
The SLM758 supports motor functions and can be implemented by the user via
PMI_HAP_OUT_N (8PIN) and PMI_HAP_OUT_P (9PIN). The reference schematic diagram is
as follows. Note that the uF-level capacitor cannot be placed on the signal line.
Figure 4.32: Motor interface circuit
