Peripheral operating requirements and behaviors
S11
S12
I2S_TX_BCLK/
S12
I2S_RX_BCLK (input)
S15
S16
I2S_TX_FS/
I2S_RX_FS (output)
S13
S19
S14
I2S_TX_FS/
I2S_RX_FS (input)
S15
S16
S15
S16
I2S_TXD
I2S_RXD
S17
S18
Figure 22. I2S/SAI timing — slave modes
6.9 Human-machine interfaces (HMI)
6.9.1 TSI electrical specifications
Table 40. TSI electrical specifications
Symbol Description
VDDTSI Operating voltage
CELE
Min.
Typ.
Max.
Unit
Notes
1.71
—
3.6
V
Target electrode capacitance range
Reference oscillator frequency
Electrode oscillator frequency
Internal reference capacitor
Oscillator delta voltage
1
20
8
500
15
pF
MHz
MHz
pF
1
fREFmax
fELEmax
CREF
—
—
—
—
2, 3
2, 4
1
1.8
—
1
VDELTA
IREF
500
—
mV
μA
2, 5
2, 6
Reference oscillator current source base current
• 2 μA setting (REFCHRG = 0)
—
—
2
3
36
50
• 32 μA setting (REFCHRG = 15)
IELE
Electrode oscillator current source base current
• 2 μA setting (EXTCHRG = 0)
μA
2, 7
—
—
2
3
36
50
• 32 μA setting (EXTCHRG = 15)
Pres5
Electrode capacitance measurement precision
Electrode capacitance measurement precision
—
8.3333
8.3333
8.3333
1.46
38400
38400
38400
—
fF/count
fF/count
fF/count
fF/count
bits
8
9
Pres20
—
Pres100 Electrode capacitance measurement precision
MaxSens Maximum sensitivity
—
10
11
0.008
—
Res
Resolution
—
16
Table continues on the next page...
K20 Sub-Family Data Sheet, Rev. 4 5/2012.
54
Freescale Semiconductor, Inc.
FREESCALE [ Freescale ]
