參數(shù)資料
型號: ST10F269Z2Q3
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP144
封裝: 28 X 28 MM, PLASTIC, QFP-144
文件頁數(shù): 144/160頁
文件大?。?/td> 1541K
代理商: ST10F269Z2Q3
ST10F269
84/160
12.10.1 - Alternate Functions of Port 7
The upper 4 lines of Port 7 (P7.7...P7.4) serve as
capture
inputs
or
compare
outputs
(CC31IO...CC28IO) for the CAPCOM2 unit.
The usage of the port lines by the CAPCOM unit,
its accessibility via software and the precautions
are the same as described for the Port 2 lines.
As all other capture inputs, the capture input
function of pins P7.7...P7.4 can also be used as
external interrupt inputs (200ns sample rate at
40MHz CPU clock).
The lower 4 lines of Port 7 (P7.3...P7.0) serve as
outputs
from
the
PWM
module
(POUT3...POUT0).
At these pins the value of the respective port
output latch is EXORed with the value of the PWM
output rather than ANDed, as the other pins do.
This allows to use the alternate output value either
as it is (port latch holds a ‘0’) or to invert its level at
the pin (port latch holds a ‘1’).
Note that the PWM outputs must be enabled via
the respective PENx bit in PWMCON1.
The Table 20 summarizes the alternate functions
of Port 7.
Table 20 : Port 7 Alternate Functions
Port 7
Alternate Function
P7.0
P7.1
P7.2
P7.3
P7.4
P7.5
P7.6
P7.7
POUT0
PWM mode channel 0 output
POUT1
PWM mode channel 1 output
POUT2
PWM mode channel 2 output
POUT3
PWM mode channel 3 output
CC28IO
Capture input / compare output channel 28
CC29IO
Capture input / compare output channel 29
CC30IO
Capture input / compare output channel 30
CC31IO
Capture input / compare output channel 31
Figure 39 : Port 7 I/O and Alternate Functions
Port 7
Alternate Function
General Purpose Input/Output
P7.7
P7.6
P7.5
P7.4
P7.3
P7.2
P7.1
P7.0
CC31IO
CC30IO
CC29IO
CC28IO
POUT3
POUT2
POUT1
POUT0
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