K40P81M100SF2_11 Datasheet, PDF (54/63 Pages) Freescale Semiconductor, Inc – Up to 100 MHz ARM Cortex-M4 core with DSP instructions delivering 1.25 Dhrystone MIPS per MHz

Peripheral operating requirements and behaviors
Table 43. TSI electrical specifications (continued)
Symbol Description
C_REF Internal reference capacitor
V_DELTA Oscillator delta voltage
I_REF Reference oscillator current source base current
I_ELE Electrode oscillator current source base current
Pres5 Electrode capacitance measurement precision
Pres20 Electrode capacitance measurement precision
Pres100 Electrode capacitance measurement precision
MaxSens2 Maximum sensitivity @ 20 pF electrode
0
MaxSens Maximum sensitivity
Res Resolution
T_Con20 Response time @ 20 pF
I_{TSI_RUN} Current added in run mode
I_{TSI_LP} Low power mode current adder
Min.
TBD
TBD
TBD
TBD
—
—
—
0.003
0.003
—
8
—
—
Typ.
1
600
1
1
TBD
TBD
TBD
0.25
—
—
15
TBD
1
Max.
TBD
TBD
TBD
TBD
TBD
TBD
TBD
—
—
16
25
—
TBD
Unit
pF
mV
μA
μA
%
%
%
fF/count
fF/count
bits
μs
μA
μA
Notes
2
2
3
4
5
6
7
8
1. The TSI module is functional with capacitance values outside this range. However, optimal performance is not guaranteed.
2. The programmable current source value is generated by multiplying the SCANC[REFCHRG] value and the base current.
3. Measured with a 5 pF electrode, reference oscillator frequency of 10 MHz, PS = 128, NSCN = 8; Iext = 16.
4. Measured with a 20 pF electrode, reference oscillator frequency of 10 MHz, PS = 128, NSCN = 2; Iext = 16.
5. Measured with a 20 pF electrode, reference oscillator frequency of 10 MHz, PS = 16, NSCN = 3; Iext = 16.
6. Measured with a 20 pF electrode, reference oscillator frequency of ~5 MHz (I_REF = 5 μA, REFCHRG = 4), PS = 128,
NSCN = 2; Iext = 16 (EXTCHRG = 15).
7. Typical value depends on the configuration used.
8. Time to do one complete measurement of the electrode. Sensitivity resolution of 0.0133 pF, PS = 0, NSCN = 0, 1
electrode, DELVOL = 2, EXTCHRG = 15.
6.9.2 LCD electrical characteristics
Table 44. 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
• HREFSEL = 0
• HREFSEL = 1
Min.
28
—
—
—
0.89
1.49
Typ.
30
100
100
2000
1.00
1.67
Δ_RTRIM V_IREG TRIM resolution
3.0
—
Table continues on the next page...
Max.
58
—
—
8000
1.15
1.85
—
Unit
Hz
nF
nF
pF
V
V
% V_IREG
Notes
1
1
2
K40 Sub-Family Data Sheet Data Sheet, Rev. 4, 3/2011.
54
Preliminary
Freescale Semiconductor, Inc.