KITMPR121EVM Freescale Semiconductor, KITMPR121EVM Datasheet - Page 17

• Manufacturer Part Number: KITMPR121EVM
• Description: KIT EVALUATION MPR121
• Manufacturer: Freescale Semiconductor

Specifications of KITMPR121EVM

• Sensor Type: Proximity
• Interface: USB
• Voltage - Supply: 5V, USB
• Embedded: No
• Utilized Ic / Part: MPR121
• Interface Type: USB, I2C, SCI, SPI
• Operating Voltage: 3.3 V
• Data Bus Width: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -
• Sensing Range: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: MPR121, MC9S08QG8

Sensors
Freescale Semiconductor
AUTO-CONFIG USL REGISTER
AUTO-CONFIG TARGET LEVEL REGISTER
As this register represents the upper limit for the auto-configuration the value can be calculated by:
For the 1.8 V system, this value is 156 or 0x9C.
Table 14. AUTO-CONFIG USL Register Field Descriptions
Reset:
Reset:
Field
USL
7:0
W
W
R
R
7
0
7
0
= Unimplemented
= Unimplemented
Upper Limit – The Upper Limit for the auto-configuration baseline search is set to
this value.
00000000 – Upper Limit set to 0
00000001 – Upper Limit set to 1
~
11111111 – Upper Limit set to 255
Figure 13. AUTO-CONFIG Target Level Register
6
0
6
0
Figure 12. AUTO-CONFIG USL Register
VSL
=
5
0
5
0
V DD 0.7
------------------------- - 256
V
DD
–
4
0
4
0
⋅
USL
T_L
Description
3
0
3
0
2
0
2
0
1
0
1
0
0
0
0
0
Equation 8
MPR121
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