st10f269z1 STMicroelectronics, st10f269z1 Datasheet - Page 87

• Manufacturer Part Number: st10f269z1
• Description: St10f269 16-bit Mcu With Mac Unit, 256k Byte Flash Memory And 12k Byte Ram
• Manufacturer: STMicroelectronics

ST10F269
12.10.1 - Alternate Functions of Port 7
The upper 4 lines of Port 7 (P7.7...P7.4) serve as
capture
(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).
Table 24 : Port 7 Alternate Functions
Figure 39 : Port 7 I/O and Alternate Functions
Port 7
P7.0
P7.1
P7.2
P7.3
P7.4
P7.5
P7.6
P7.7
inputs
General Purpose Input/Output
POUT0
POUT1
POUT2
POUT3
CC28IO
CC29IO
CC30IO
CC31IO
Port 7
or
PWM mode channel 0 output
PWM mode channel 1 output
PWM mode channel 2 output
PWM mode channel 3 output
Capture input / compare output channel 28
Capture input / compare output channel 29
Capture input / compare output channel 30
Capture input / compare output channel 31
compare
P7.7
P7.6
P7.5
P7.4
P7.3
P7.2
P7.1
P7.0
outputs
Alternate Function
The lower 4 lines of Port 7 (P7.3...P7.0) serve as
outputs
(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.
Alternate Function
from
CC31IO
CC30IO
CC29IO
CC28IO
POUT3
POUT2
POUT1
POUT0
12 - PARALLEL PORTS
the
PWM
module
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