Datasheet

ST10F269 12 - PARALLEL PORTS
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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 on PQFP144 devices and
250ns sample rate at 32MHz CPU clock on
TQFP144 devices).
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 24 summarizes the alternate functions
of Port 7.
Table 24 : 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