MK30DN512ZVLK10 Freescale Semiconductor, MK30DN512ZVLK10 Datasheet - Page 1451

• Manufacturer Part Number: MK30DN512ZVLK10
• Description: ARM Microcontrollers - MCU KINETIS 512K SLCD
• Manufacturer: Freescale Semiconductor

Specifications of MK30DN512ZVLK10

• Core: ARM Cortex M4
• Processor Series: K30
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 512 KB
• Data Ram Size: 128 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.71 V to 3.6 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: LQFP-80
• Mounting Style: SMD/SMT

Reset
48.6.6 Channel n threshold register (TSIx_THRESHLD)
All THRESHLD bits can be read at any time, but must not be written while
GENCS[SCNIP] is set.
Addresses: 4004_5000h base + 120h offset + (4d × n), where n = 0d to 15d
48.7 Functional descriptions
This section provides functional description of the TSI module.
48.7.1 Capacitance measurement
The electrode pin capacitance measurement uses a dual oscillator approach. The TSI
electrode oscillator has its frequency dependable on the external electrode capacitance
and the TSI module configuration. After going to a configurable prescaler, the TSI
electrode oscillator signal goes to the input of the modulo counter. The time for the
external electrode oscillations is measured using the TSI reference oscillator. The
measured electrode capacitance is directly proportional to this time.
48.7.1.1 TSI electrode oscillator
The TSI electrode oscillator circuit is illustrated in the following figure. A configurable
constant current source is used to charge and discharge the external electrode
capacitance. A buffer hysteresis defines the oscillator delta voltage. The delta voltage
defines the margin of high and low voltage which are the reference input of the
comparator in different time.
Freescale Semiconductor, Inc.
Bit
W
R
31
0
31–16
HTHH
LTHH
15–0
Field
30
0
29
0
28
0
Low threshold value
High threshold value
27
0
26
0
25
0
24
LTHH
0
K30 Sub-Family Reference Manual, Rev. 6, Nov 2011
23
0
TSIx_THRESHLDn field descriptions
22
0
21
0
20
0
19
0
18
0
17
0
16
0
15
0
Description
14
0
13
0
12
0
11
0
10
0
Chapter 48 Touch sense input (TSI)
0
9
HTHH
0
8
0
7
0
6
0
5
4
0
0
3
0
2
0
1
1451
0
0