Rev. 3.0, 10/02, page 402 of 686
Yes
<End>
[1]
No
Initialization
Start reception
[2]
No
Yes
Read RDRF flag in SSR
[4]
[5]
Clear RE bit in SCR to 0
Error processing
(Continued below)
[3]
Read receive data in RDR, and
clear RDRF flag in SSR to 0
No
Yes
ORER = 1
RDRF = 1
All data received?
Read ORER flag in SSR
<End>
Error processing
Overrun error processing
Clear ORER flag in SSR to 0
[3]
[1] SCI initialization:
The RxD pin is automatically
designated as the receive data input
pin.
[2] [3] Receive error processing:
If a receive error occurs, read the
ORER flag in SSR, and after
performing the appropriate error
processing, clear the ORER flag to 0.
Transfer cannot be resumed if the
ORER flag is set to 1.
[4] SCI status check and receive data
read:
Read SSR and check that the RDRF
flag is set to 1, then read the receive
data in RDR and clear the RDRF flag
to 0.
Transition of the RDRF flag from 0 to 1
can also be identified by an RXI
interrupt.
[5] Serial reception continuation
procedure:
To continue serial reception, before
the MSB (bit 7) of the current frame is
received, reading the RDRF flag,
reading RDR, and clearing the RDRF
flag to 0 should be finished. The
RDRF flag is cleared automatically
when the DMAC or DTC is activated
by a receive data full interrupt (RXI)
request and the RDR value is read.
Figure 13.22 Sample Serial Reception Flowchart
Содержание H8S/2215 Series
Страница 4: ...Rev 3 0 10 02 page iv of lviii ...
Страница 6: ...Rev 3 0 10 02 page vi of lviii ...
Страница 28: ...Rev 3 0 10 02 page xxviii of lviii ...
Страница 122: ...Rev 3 0 10 02 page 64 of 686 ...
Страница 132: ...Rev 3 0 10 02 page 74 of 686 ...
Страница 156: ...Rev 3 0 10 02 page 98 of 686 ...
Страница 198: ...Rev 3 0 10 02 page 140 of 686 ...
Страница 320: ...Rev 3 0 10 02 page 262 of 686 ...
Страница 384: ...Rev 3 0 10 02 page 326 of 686 ...
Страница 474: ...Rev 3 0 10 02 page 416 of 686 ...
Страница 481: ...Rev 3 0 10 02 page 423 of 686 I O pin Control OUT IN TDI pin TDO pin Figure 14 2 Boundary Scan Register Configuration ...
Страница 608: ...Rev 3 0 10 02 page 550 of 686 ...
Страница 614: ...Rev 3 0 10 02 page 556 of 686 ...
Страница 650: ...Rev 3 0 10 02 page 592 of 686 ...
Страница 652: ...Rev 3 0 10 02 page 594 of 686 ...
Страница 680: ...Rev 3 0 10 02 page 622 of 686 ...
Страница 721: ...Rev 3 0 10 02 page 663 of 686 ø A23 to A0 to tBRQS tBACD tBZD tBACD tBZD tBRQS Figure 24 11 External Bus Release Timing ...
Страница 732: ...Rev 3 0 10 02 page 674 of 686 ...
Страница 740: ...Rev 3 0 10 02 page 682 of 686 ...