NEC mPD784225 Series User Manual page 139

6.1 Functions
The real-time output function transfers preset data in the real-time output buffer register to the output latch by
hardware synchronized to the generation of a timer interrupt or an external interrupt and outputs it off the chip. Also,
the pins for output off the chip are called the real-time output port.
Since jitter-free signals can be output by using the real-time output port, the operation is optimized for the control
of stepping motors, for example.
The port mode or real-time output mode can be specified in 1-bit units.
6.2 Configuration
The real-time output port includes the following hardware.
Item
Registers
Control registers
CHAPTER 6 REAL-TIME OUTPUT FUNCTIONS
Table 6-1. Configuration of Real-Time Output Port
Real-time output buffer registers (RTBL, RTBH)
Real-time output port mode register (RTPM)
Real-time output port control register (RTPC)
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Configuration
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