Chapter 4 I/O Ports

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

Port 1

 

 

 

 

 

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

 

 

 

 

 

 

Real Time Output Control (Port 1) IV - 45

Page 195
Image 195
Panasonic F77G, MN101C77C user manual Real Time Output Control Port, shows the real time output control register of port