Datasheet

Table 49. I
2
S slave mode timing (full voltage range)
Num Description Min. Max. Unit
Operating voltage 1.71 3.6 V
S11 I2S_BCLK cycle time (input) 8 x t
SYS
— ns
S12 I2S_BCLK pulse width high/low (input) 45% 55% MCLK period
S13 I2S_FS input setup before I2S_BCLK 10 — ns
S14 I2S_FS input hold after I2S_BCLK 3.5 — ns
S15 I2S_BCLK to I2S_TXD/I2S_FS output valid — 28.6 ns
S16 I2S_BCLK to I2S_TXD/I2S_FS output invalid 0 — ns
S17 I2S_RXD setup before I2S_BCLK 10 — ns
S18 I2S_RXD hold after I2S_BCLK 2 — ns
6.9 Human-machine interfaces (HMI)
6.9.1 TSI electrical specifications
Table 50. 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 — 5.5 12.7 MHz 2
f
ELEmax
Electrode oscillator frequency — 0.5 4.0 MHz 3
C
REF
Internal reference capacitor 0.5 1 1.2 pF
V
DELTA
Oscillator delta voltage 100 600 760 mV 4
I
REF
Reference oscillator current source base current
• 1uA setting (REFCHRG=0)
• 32uA setting (REFCHRG=31)
—
—
1.133
36
1.5
50
μA 3 , 5
I
ELE
Electrode oscillator current source base current
• 1uA setting (EXTCHRG=0)
• 32uA setting (EXTCHRG=31)
—
—
1.133
36
1.5
50
μA 3 , 6
Pres5 Electrode capacitance measurement precision — 8.3333 38400 fF/count 7
Pres20 Electrode capacitance measurement precision — 8.3333 38400 fF/count 8
Pres100 Electrode capacitance measurement precision — 8.3333 38400 fF/count 9
MaxSens Maximum sensitivity 0.003 12.5 — fF/count 10
Res Resolution — — 16 bits
T
Con20
Response time @ 20 pF 8 15 25 μs 11
I
TSI_RUN
Current added in run mode — 55 — μA
I
TSI_LP
Low power mode current adder — 1.3 2.5 μA 12
1. The TSI module is functional with capacitance values outside this range. However, optimal performance is not guaranteed.
2. CAPTRM=7, DELVOL=7, and fixed external capacitance of 20 pF.
Peripheral operating requirements and behaviors
K20 Sub-Family Data Sheet Data Sheet, Rev. 7, 02/2013.
Freescale Semiconductor, Inc. 63