Datasheet

Functional Description
MC13783 Technical Data, Rev. 3.5
Freescale Semiconductor 39
provide the leakage current of the coin cell. The RTC will run from VATLAS in this case. A capacitor
should be placed from LICELL to ground if no coin cell is used.
4.4.2 ADC Subsystem
4.4.2.1 Converter Core
The ADC core is a 10 bit successive approximation converter.
4.4.2.2 Input Selector
The ADC has two groups of 8 input channels. ADSEL selects between two groups of input signals. If set
to zero then group 0 is read and stored, if set to 1 then group 1 is read and stored. This is done to shorten
the total read time and to reduce the required storage of converted values. The table below gives an
overview of the attribution of the A to D channels.
Table 24. ADC Inputs
Channel Signal read Expected Input Range Scaling Scaled Version
Group 0 – ADSEL=0
0 Battery Voltage (BATT) 2.50 – 4.65 V - 2.40 V 0.10 – 2.25 V
1 Battery Current (BATT – BATTISNS) -50 - +50 mV x20 -1.00 - +1.00 V
2 Application Supply (BP) 2.50 – 4.65 V - 2.40 V 0.10 – 2.25 V
3 Charger Voltage (CHRGRAW) 0 – 10 V /
0 – 20 V
/5
/10
0 – 2.00 V
0 – 2.00 V
4 Charger Current (CHRGISNSP-CHRGISNSN) -250mV – +250 mV X4 -1.00 – 1.00 V
5 General Purpose ADIN5 / Battery Pack Thermistor 0 – 2.30 V No 0 – 2.30 V
6 General Purpose ADIN6 / Backup Voltage (LICELL) 0 – 2.30 V /
1.50 – 3.50 V
No /
- 1.20 V
0 – 2.30 V
0.30 – 2.30 V
7 General Purpose ADIN7 / UID / Die Temperature 0 – 2.30 V /
0 – 2.55 V / TBD
No /
x0.9 / No
0 – 2.30 V
Group 1 – ADSEL=1
8 General Purpose ADIN8 0 - 2.30 V No 0 – 2.30 V
9 General Purpose ADIN9 0 - 2.30 V No 0 – 2.30 V
10 General Purpose ADIN10 0 - 2.30 V No 0 – 2.30 V
11 General Purpose ADIN11 0 - 2.30 V No 0 – 2.30 V
12 General Purpose TSX1 / Touchscreen X-plate 1 0 - 2.30 V No 0 – 2.30 V
13 General Purpose TSX2 / Touchscreen X-plate 2 0 - 2.30 V No 0 – 2.30 V
14 General Purpose TSY1 /
Touchscreen Y-plate 1
0 - 2.30 V No 0 – 2.30 V
15 General Purpose TSY2 /
Touchscreen Y-plate 2
0 - 2.30 V No 0 – 2.30 V