CHAPTER 13 REAL-TIME OUTPUT FUNCTION (RTO)
User’s Manual U13850EJ6V0UD
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13.4 RTO Control Registers
RTO is controlled by using the following two types of registers.
•
Real-time output port mode register (RTPM)
•
Real-time output port control register (RTPC)
(1) Real-time output port mode register (RTPM)
This register selects real-time output port mode or port mode in 1-bit units.
RTPM is set by an 8-bit or 1-bit memory manipulation instruction.
RESET input clears RTPM to 00H.
After reset: 00H
R/W
Address: FFFFF3A4H
7
6
5
4
3
2
1
0
RTPM
RTPM7
RTPM6
RTPM5
RTPM4
RTPM3
RTPM2
RTPM1
RTPM0
RTPMn
Selection of real-time output port (n = 0 to 7)
0
Port mode
1
Real-time output port mode
Cautions 1.
Set a port pin to the output mode when it is used as a real-time output port pin.
2.
A port specified as a real-time output port cannot set data to the port output latch. To set the
initial values of the real-time output port, set data to the port output latch in the port mode
and then set to the real-time output port mode (refer to 13.5 Usage).
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