Rev. 6.00, 08/04, page 264 of 628
Read Access
In access to TCF, when the upper byte is read the upper-byte data is transferred directly to the
CPU and the lower-byte data is transferred to TEMP. Next, when the lower byte is read, the
lower-byte data in TEMP is transferred to the CPU.
In access to OCRF, when the upper byte is read the upper-byte data is transferred directly to the
CPU. When the lower byte is read, the lower-byte data is transferred directly to the CPU.
Figure 9.5 shows an example in which TCF is read when it contains H'AAFF.
Read upper byte
CPU
(H'AA)
TEMP
(H'FF)
TCFH
(H'AA)
TCFL
(H'FF)
Bus
interface
Module data bus
Read lower byte
CPU
(H'FF)
TEMP
(H'FF)
TCFH
(AB)
*
TCFL
(00)
*
Bus
interface
Module data bus
Note:
*
H'AB00 if counter has been updated once.
Figure 9.5 Read Access to TCF (TCF
→
→
→
→
CPU)
Содержание H8/38024 Series
Страница 18: ...Rev 6 00 08 04 page xviii of xxx...
Страница 30: ...Rev 6 00 08 04 page xxx of xxx...
Страница 130: ...Rev 6 00 08 04 page 100 of 628...
Страница 216: ...Rev 6 00 08 04 page 186 of 628...
Страница 416: ...Rev 6 00 08 04 page 386 of 628...
Страница 432: ...Rev 6 00 08 04 page 402 of 628...
Страница 468: ...Rev 6 00 08 04 page 438 of 628...
Страница 661: ...H8 38024 H8 38024S H8 38024F ZTAT H8 38124 Group Hardware Manual...