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CHAPTER 12 REAL-TIME OUTPUT FUNCTION (RTO)
12.1 Function
The real-time output function (RTO) transfers preset data to the RTBL0 and RTBH0 registers, and then transfers
this data with hardware to an external device via the real-time output latches, upon occurrence of a timer interrupt.
The pins through which the data is output to an external device constitute a port called a real-time output port.
Because RTO can output signal without jitter, it is suitable for controlling a stepping motor.
In the V850ES/KE1+, a 6-bit real-time output port channel is provided.
The real-time output port can be set in the port mode or real-time output port mode in 1-bit units.
The block diagram of RTO is shown below.
INTTM50
INTTM51
RTPOE0 RTPEG0 BYTE0
Real-time output port control
register 0 (RTPC0)
Figure 12-1. Block Diagram of RTO
Real-time buffer
register 0H
(RTBH0)
Real-time buffer
register 0L
(RTBL0)
Transfer trigger (H)
Selector
Transfer trigger (L)
EXTR0
User's Manual U16896EJ2V0UD
Real-time output
latch 0H
Real-time output
latch 0L
2
RTPM05 RTPM04 RTPM03 RTPM02 RTPM01 RTPM00
Real-time output port mode
register 0 (RTPM0)
2
RTPOUT04,
RTPOUT05
4
RTPOUT00 to
RTPOUT03
4
357
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