Section 9 Timers
Rev. 6.00 Aug 04, 2006 page 286 of 680
REJ09B0145-0600
1. Write Access
Write access to the upper byte results in transfer of the upper-byte write data to TEMP. Next,
write access to the lower byte results in transfer of the data in TEMP to the upper register byte,
and direct transfer of the lower-byte write data to the lower register byte.
Figure 9.4 shows an example in which H'AA55 is written to TCF.
Write to upper byte
CPU
(H'AA)
TEMP
(H'AA)
TCFH
( )
TCFL
( )
Bus
interface
Module data bus
Write to lower byte
CPU
(H'55)
TEMP
(H'AA)
TCFH
(H'AA)
TCFL
(H'55)
Bus
interface
Module data bus
Figure 9.4 Write Access to TCR (CPU
→
→
→
→
TCF)
Содержание H8/38342
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