参数资料
型号: PPXY8300A6T1
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: Pressure Sensor
英文描述: DIFFERENTIAL, PEIZORESISTIVE PRESSURE SENSOR, RECTANGULAR, SURFACE MOUNT
封装: SOIC-20
文件页数: 127/162页
文件大小: 4316K
代理商: PPXY8300A6T1
MPXY8300 Series
Sensors
Freescale Semiconductor
67
SECTION 9 TIMER/PULSE-WIDTH MODULATOR
The MPXY8300 Series provides one timer/pulse-width modulator (TPM).
9.1
TPM Configuration Information
The device provides one two-channel timer/pulse-width modulator (TPM).
An easy way to measure the low frequency oscillator (LFO) is to connect the LFO directly to TPM channel 0. The LFOSEL bit in
the SOPTZ determines whether TPMCH0 is connected to PTAZ or the LFO.
TPM clock source selection for the TPM is shown in the table below.
9.1.1
Features
The TPM has the following features:
May be configured for buffered, center-aligned pulse-width modulation (CPWM) on all channels
Clock sources independently selectable
Selectable clock sources (device dependent): bus clock, fixed system clock
Clock prescaler taps for divide by 1, 2, 4, 8, 16, 32, 64, or 128
16-bit free-running or up/down (CPWM) count operation
16-bit modulus register to control counter range
Timer system enable
One interrupt per channel plus a terminal count interrupt
Channel features:
Each channel may be input capture, output compare, or buffered edge-aligned PWM
Rising-edge, falling-edge, or any-edge input capture trigger
Set, clear, or toggle output compare action
Selectable polarity on PWM outputs
9.1.2
Block Diagram
Figure 9-1 shows the structure of a TPM.
Table 9-1 TPM Clock Source Selection
CLKSB
CLKSA
Clock Source
0
No source; TPM disabled
0
1
BUSCLK
1
0
BUSCLK
1
Internal DX pin
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