HD64F3039F18 Datasheet, PDF (283/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

GRA3
GR
Section 8 16-Bit Integrated Timer Unit (ITU)
H'0000
BR
Not allowed
GR
Figure 8.39 Changing a General Register Setting by Buffer Transfer (Example 1)
 Buffer transfer at transition from up-counting to down-counting
If the general register value is in the range from GRA3 – T + 1 to GRA3, do not transfer a
buffer register value outside this range. Conversely, if the general register value is outside
this range, do not transfer a value within this range. See figure 8.40.
GRA3 + 1
GRA3
Illegal changes
GRA3 – T + 1
GRA3 – T
TCNT3
TCNT4
Figure 8.40 Changing a General Register Setting by Buffer Transfer (Caution 1)
 Buffer transfer at transition from down-counting to up-counting
If the general register value is in the range from H'0000 to T – 1, do not transfer a buffer
register value outside this range. Conversely, when a general register value is outside this
range, do not transfer a value within this range. See figure 8.41.
Rev.3.00 Mar. 26, 2007 Page 259 of 682
REJ09B0353-0300