CP3-TB-BT26-0 National Semiconductor, CP3-TB-BT26-0 Datasheet - Page 73

• Manufacturer Part Number: CP3-TB-BT26-0
• Description: BOARD TARGET FOR CP3BT26
• Manufacturer: National Semiconductor
• Type: Microcontrollerr

Specifications of CP3-TB-BT26-0

• Contents: *
• For Use With/related Products: CP3BT26
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q1879090A

14.2
OPEN-DRAIN OPERATION
A port pin can be configured to operate as an inverting
open-drain output buffer. To do this, the CPU must clear the
bit in the data output register (PxDOUT) and then use the
port direction register (PxDIR) to set the value of the port
pin. With the direction register bit set (direction = out), the
value zero is forced on the pin. With the direction register bit
clear (direction = in), the pin is placed in the TRI-STATE
mode. If desired, the internal weak pull-up can be enabled
to pull the signal high when the output buffer is in TRI-
STATE mode.
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