Open-Loop Control For A Stepper Motor By The Real-Time Output Port - NEC PD78212 User Manual

8-bit single-chip microcomputer sub-series

Table of Contents

µ PD78214 Sub-Series

(3) Example of using the type C macro service

The following example shows a pattern output to the real-time output port and how the output interval is

controlled directly.

Update data is transferred from two data areas previously set in the 64K-byte space to the buffer registers

(P0H and P0L) and compare registers (CR10 and CR11) for the real-time output port.

Fig. 12-27 Open-Loop Control for a Stepper Motor by the Real-Time Output Port

Output data area

Output timing

Compare register

8-bit timer/counter 1

64K memory space

Macro service control word

Mode register

Channel pointer

Buffer register

Real-time output

trigger/macro

service start

(internal RAM)

Internal bus

Real-time output port

Stepper motor