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R01UH0336EJ0102 Rev.1.02
Page 410 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 13 Timer Array Unit B (TAUB)
13.7 Simultaneous Rewrite
13.7.1
Overview
Simultaneous rewrite describes the ability to change the compare/start value
and the output logic of multiple channels at the same time.
The corresponding data registers and control registers (TAUBnCDRm and
TAUBnTOLm) can nevertheless be written at any time. The new value does
not affect the counter operation or the output signal until simultaneous rewrite
is triggered.
Simultaneous rewrite can be triggered by:
• The counter on the master channel or upper channel (depending on the
selected operating mode) reaching a certain value
• INTTAUBnIm being issued on the upper channel specified by
TAUBnRDC.TAUBnRDCm
There are three methods for simultaneous rewrite. These are listed in the
following table, along with how to specify them and when they cause
simultaneous rewrite to be triggered.
The following table lists which of these three methods is available for each
channel operation function. For details on the individual channel operation
functions, see Section 13.12, Independent Channel Operation Functions
,
and
Section 13.17, Synchronous Channel Operation Functions
.
Table 13-8
Simultaneous Rewrite Methods and Trigger Timing
Method
Simultaneous Rewrite Trigger Timing
TAUBn
RDE.
TAUBn
RDEm
TAUBn
RDS.
TAUBn
RDSm
TAUBn
RDM.
TAUBn
RDMm
—
No simultaneous rewrite
0
0
0
A
The master channel starts/restarts counting.
1
0
0
B
The master channel starts counting down at the upper peak of a
triangular cycle.
1
0
1
C1
INTTAUBnIm is generated on an upper channel specified by
TAUBnRDC.RDCm
1 1
0