Information

S15
S13
S15
S17 S18
S15
S16
S16
S14
S16
S11
S12
S12
I2S_TX_BCLK/
I2S_RX_BCLK (input)
I2S_TX_FS/
I2S_RX_FS (output)
I2S_TXD
I2S_RXD
I2S_TX_FS/
I2S_RX_FS (input)
S19
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 Min. Typ. Max. Unit Notes
V
DDTSI
Operating voltage 1.71 — 3.6 V
C
ELE
Target electrode capacitance range 1 20 500 pF 1
f
REFmax
Reference oscillator frequency — 8 15 MHz 2, 3
f
ELEmax
Electrode oscillator frequency — 1 1.8 MHz 2, 4
C
REF
Internal reference capacitor — 1 — pF
V
DELTA
Oscillator delta voltage — 500 — mV 2, 5
I
REF
Reference oscillator current source base current
• 2 μA setting (REFCHRG = 0)
• 32 μA setting (REFCHRG = 15)
—
—
2
36
3
50
μA 2, 6
I
ELE
Electrode oscillator current source base current
• 2 μA setting (EXTCHRG = 0)
• 32 μA setting (EXTCHRG = 15)
—
—
2
36
3
50
μA 2, 7
Pres5 Electrode capacitance measurement precision — 8.3333 38400 fF/count 8
Pres20 Electrode capacitance measurement precision — 8.3333 38400 fF/count 9
Pres100 Electrode capacitance measurement precision — 8.3333 38400 fF/count 10
MaxSens Maximum sensitivity 0.008 1.46 — fF/count 11
Res Resolution — — 16 bits
Table continues on the next page...
Peripheral operating requirements and behaviors
K20 Sub-Family Data Sheet, Rev. 4 5/2012.
54 Freescale Semiconductor, Inc.