mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 1231

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Reset
48.6.6 Channel n threshold register (TSIx_THRESHLDn)
All THRESHLD bits can be read at any time, but must not be written while
GENCS[SCNIP] is set.
Addresses: FFFF_9400h base + 120h offset + (4d × n), where n = 0d to 15d
48.7 Functional descriptions
This section provides functional description of the TSI module.
48.7.1 Capacitance measurement
The electrode pin capacitance measurement uses a dual oscillator approach. The TSI
electrode oscillator has its frequency dependable on the external electrode capacitance
and the TSI module configuration. After going to a configurable prescaler, the TSI
electrode oscillator signal goes to the input of the modulo counter. The time for the
external electrode oscillations is measured using the TSI reference oscillator. The
measured electrode capacitance is directly proportional to this time.
Freescale Semiconductor, Inc.
Bit
W
R
31
0
CNTN1
31–16
CNTN
31–16
HTHH
LTHH
15–0
15–0
Field
Field
30
0
29
0
28
0
TouchSensing channel n+1 16-bit counter value
TouchSensing channel n 16-bit counter value
Low threshold value
High threshold value
27
0
26
0
25
0
24
LTHH
0
MCF51JF128 Reference Manual, Rev. 2, 03/2011
23
0
TSIx_THRESHLDn field descriptions
22
0
TSIx_CNTRn field descriptions
21
0
20
0
19
0
18
0
Preliminary
17
0
16
0
15
0
Description
Description
14
0
13
0
12
0
11
0
10
0
Chapter 48 Touch Sense Input (TSI)
0
9
HTHH
0
8
0
7
0
6
0
5
4
0
0
3
0
2
0
1
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0
0