K40P100M100SF2V2 Datasheet, PDF (62/70 Pages) Freescale Semiconductor, Inc – K40 Sub-Family

Peripheral operating requirements and behaviors
1. The TSI module is functional with capacitance values outside this range. However, optimal performance is not guaranteed.
2. Fixed external capacitance of 20 pF.
3. REFCHRG = 2, EXTCHRG=0.
4. REFCHRG = 0, EXTCHRG = 10.
5. V_DD = 3.0 V.
6. The programmable current source value is generated by multiplying the SCANC[REFCHRG] value and the base current.
7. The programmable current source value is generated by multiplying the SCANC[EXTCHRG] value and the base current.
8. Measured with a 5 pF electrode, reference oscillator frequency of 10 MHz, PS = 128, NSCN = 8; Iext = 16.
9. Measured with a 20 pF electrode, reference oscillator frequency of 10 MHz, PS = 128, NSCN = 2; Iext = 16.
10. Measured with a 20 pF electrode, reference oscillator frequency of 10 MHz, PS = 16, NSCN = 3; Iext = 16.
11. Sensitivity defines the minimum capacitance change when a single count from the TSI module changes. Sensitivity
depends on the configuration used. The documented values are provided as examples calculated for a specific
configuration of operating conditions using the following equation: (C_ref * I_ext)/( I_ref * PS * NSCN)
The typical value is calculated with the following configuration:
I_ext = 6 μA (EXTCHRG = 2), PS = 128, NSCN = 2, I_ref = 16 μA (REFCHRG = 7), C_ref = 1.0 pF
The minimum value is calculated with the following configuration:
I_ext = 2 μA (EXTCHRG = 0), PS = 128, NSCN = 32, I_ref = 32 μA (REFCHRG = 15), C_ref = 0.5 pF
The highest possible sensitivity is the minimum value because it represents the smallest possible capacitance that can be
measured by a single count.
12. Time to do one complete measurement of the electrode. Sensitivity resolution of 0.0133 pF, PS = 0, NSCN = 0, 1
electrode, EXTCHRG = 7.
13. REFCHRG=0, EXTCHRG=4, PS=7, NSCN=0F, LPSCNITV=F, LPO is selected (1 kHz), and fixed external capacitance of
20 pF. Data is captured with an average of 7 periods window.
6.9.2 LCD electrical characteristics
Table 50. LCD electricals
Symbol
f_Frame
C_LCD
C_BYLCD
C_Glass
V_IREG
Description
LCD frame frequency
LCD charge pump capacitance — nominal value
LCD bypass capacitance — nominal value
LCD glass capacitance
V_IREG
• HREFSEL=0, RVTRIM=1111
• HREFSEL=0, RVTRIM=1000
• HREFSEL=0, RVTRIM=0000
Min.
28
—
—
—
—
—
—
Typ.
30
100
100
2000
1.11
1.01
0.91
• HREFSEL=1, RVTRIM=1111
• HREFSEL=1, RVTRIM=1000
• HREFSEL=1, RVTRIM=0000
—
1.84
—
1.69
—
1.54
Δ_RTRIM V_IREG TRIM resolution
—
—
Table continues on the next page...
Max.
58
—
—
8000
—
—
—
—
—
—
Unit
Notes
Hz
nF
1
nF
1
pF
2
3
V
V
V
V
V
V
3.0
% V_IREG
K40 Sub-Family Data Sheet, Rev. 1, 6/2012.
62
Preliminary
Freescale Semiconductor, Inc.
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