Human-machine interfaces (HMI)
S11
S12
I2S_TX_BCLK/
S12
I2S_RX_BCLK (input)
S15
S16
I2S_TX_FS/
I2S_RX_FS (output)
S13
S14
I2S_TX_FS/
I2S_RX_FS (input)
S15
S16
S15
S16
I2S_TXD
I2S_RXD
S17
S18
Figure 19. I2S/SAI timing — slave modes
6.9 Human-machine interfaces (HMI)
6.9.1 TSI electrical specifications
Table 37. 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
5.5
0.5
1
500
14
pF
MHz
MHz
pF
1
2
3
fREFmax
fELEmax
CREF
—
—
4.0
1.2
760
0.5
100
VDELTA
IREF
600
mV
μA
4
Reference oscillator current source base current
• 1uA setting (REFCHRG=0)
3 , 5
—
—
1.133
36
1.5
50
• 32uA setting (REFCHRG=31)
IELE
Electrode oscillator current source base current
• 1uA setting (EXTCHRG=0)
μA
3 , 6
—
—
1.133
36
1.5
50
• 32uA setting (EXTCHRG=31)
Pres5
Electrode capacitance measurement precision
Electrode capacitance measurement precision
—
8.3333
8.3333
8.3333
12.5
—
38400
38400
38400
—
%
%
7
8
Pres20
—
Pres100 Electrode capacitance measurement precision
MaxSens Maximum sensitivity
—
%
9
0.003
—
fF/count
bits
10
Res
Resolution
16
TCon20
Response time @ 20 pF
8
15
25
μs
11
Table continues on the next page...
MCF51JU128 Data Sheet, Rev. 4, 01/2012.
Freescale Semiconductor, Inc.
53
FREESCALE [ Freescale ]
