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Chapter 4 I/O Ports
Real Time Output Control (Port 1)
4-10 Real Time Output Control (Port 1)
P10 , P12 and P14 has a real time output function that can switch pin's output at the falling edge of the
external interrupt 0 pin (P20/IRQ0).
Real time control can change timer output signal (PWM output, timer pulse output, remote control carrier
output), without setting on the program, in synchronization with external event. Output levels to be
switched at event generation are 3 ; "0", "1" and "high impedance (Hi-z)".
4-10-1 Registers
Table 4-10-1 shows the real time output control register of port 1.
Table 4-10-1 Real Time Output Control Registers
Register Address R/W Function Page
P1OUT x'03F11' R/W Port 1 output register IV - 13
P1OMD x'03F2F' R/W Port 1 output mode register IV - 14
P1DIR x'03F31' R/W Port 1 direction control register IV - 13
P1PLU x'03F41' R/W Port 1 pull-up control register IV - 13
P1TCNT x'03F7E' R/W Port 1 output control register IV - 14
Port 1