參數(shù)資料
型號(hào)： PPXY8300A6T1
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： Pressure Sensor
英文描述： DIFFERENTIAL, PEIZORESISTIVE PRESSURE SENSOR, RECTANGULAR, SURFACE MOUNT
封裝： SOIC-20
文件頁數(shù)： 128/162頁
文件大?。?/td> 4316K
代理商： PPXY8300A6T1
MPXY8300 Series
Sensors
68
Freescale Semiconductor
Figure 9-1 TPM Block Diagram
The central component of the TPM is the 16-bit counter that can operate as a free-running counter, a modulo counter, or an up-
/down-counter when the TPM is configured for center-aligned PWM. The TPM counter (when operating in normal up-counting
mode) provides the timing reference for the input capture, output compare, and edge-aligned PWM functions. The timer counter
modulo registers, TPMMODH:TPMMODL, control the modulo value of the counter. (The values 0x0000 or 0xFFFF effectively
make the counter free running.) Software can read the counter value at any time without affecting the counting sequence. Any
write to either byte of the TPMCNT counter resets the counter regardless of the data value written.
All TPM channels are programmable independently as input capture, output compare, or buffered edge-aligned PWM channels.
9.2
External Signal Description
When any pin associated with the timer is configured as a timer input, a passive pull-up can be enabled. After reset, the TPM
modules are disabled and all pins default to general-purpose inputs with the passive pull-ups disabled.
9.2.1
TPMCHn — TPM Channel n I/O Pins
Each TPM channel is associated with an I/O pin on the MCU. The function of this pin depends on the configuration of the channel.
In some cases, no pin function is needed so the pin reverts to being controlled by general-purpose I/O controls. When a timer
has control of a port pin, the port data and data direction registers do not affect the related pin(s). See the Section 2 for additional
information about shared pin functions.
9.3
Register Definition
The TPM includes:
An 8-bit status and control register (TPMSC)
A 16-bit counter (TPMCNTH:TPMCNTL)
A 16-bit modulo register (TPMMODH:TPMMODL)
PRESCALE AND SELECT
16-BIT COMPARATOR
MAIN 16-BIT COUNTER
16-BIT COMPARATOR
16-BIT LATCH
PORT
16-BIT COMPARATOR
16-BIT LATCH
CHANNEL 0
CHANNEL 1
INT
E
RNAL
BUS
LOGIC
INTERRUPT
PORT
LOGIC
COUNTER RESET
DIVIDE BY
CLOCK SOURCE
OFF, BUS, XCLK, EXT
BUSCLK
SELECT
SYNC
INTERRUPT
1, 2, 4, 8, 16, 32, 64, or 128
LOGIC
CLKSA
CLKSB
PS2
PS1
PS0
TOF
TPMMODH:TPMMODL
TPMC0VH:TPMC0VL
TPMC1VH:TPMC1VL
TPMCH1
TPMCH0
DX
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