參數(shù)資料
型號(hào): GPTRM
英文描述: General-Purpose Timer Reference Manual
中文描述: 通用定時(shí)器參考手冊(cè)
文件頁(yè)數(shù): 21/90頁(yè)
文件大?。?/td> 647K
代理商: GPTRM
GPT
REFERENCE MANUAL
SIGNAL DESCRIPTIONS
MOTOROLA
2-1
SECTION 2SIGNAL DESCRIPTIONS
The GPT has 12 signal pins that provide connections to the internal functions of the
module. This section contains brief descriptions of the GPT input and output signals in
their functional groups.
2.1 Signal Groups
The block diagram in
nal pins. When the pins are not needed for their primary function they can be used for
general-purpose input or output. The block diagram also shows which pins are bidirec-
tional and which are either input or output only.
Figure 2-1
shows the primary and alternate functions of the sig-
Figure 2-1 Function Signal Groups
2.2 Input Capture Pins (IC[1:3])
These pins are used by the input capture functions of the GPT. Each pin is associated
with a single input capture function. The pin inputs are conditioned in such a way that
any pulse longer than two system clocks is guaranteed to pass, and any pulse shorter
than one system clock is ignored. Each pin has a dedicated 16-bit capture register to
hold the captured counter value. When any of the pins are not needed for the input
capture function they can be used for general-purpose I/O. Refer to
Functions
for additional details of the input capture function.
3.2 Input Capture
IMB
PULSE ACCUMULATOR
BUS INTERFACE
COMPARE/CAPTURE UNIT
PRESCALER
IC1/GP0
IC2/GP1
IC3/GP2
PCLK
PWMB
PWMA
PAI
IC4/OC5/OC1/GP7
OC4/OC1/GP6
OC3/OC1/GP5
OC2/OC1/GP4
OC1/GP3
PWM UNIT
INPUT CAPTURE
OUTPUT COMPARE
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
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