HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 605
HD6417615
Manufacturer Part Number
HD6417615
Description
Hardware Manual
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6417615.pdf
(873 pages)
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1. The SCIF monitors the communication line, and if a 0 start bit is detected, performs internal
2. The received data is stored in SCRSR in LSB-to-MSB order or MSB-to-LSB order according
3. The parity bit and stop bit are received.
Note: No further receive operations can be performed when an overrun error has occurred. The
4. If the RIE bit setting in SCSCR is 1 when the RDF or DR flag is set to 1, a receive-FIFO-data-
592
In serial reception, the SCIF operates as described below.
synchronization and starts reception.
to the setting of the RLM bit in SC2SSR.
After receiving these bits, the SCIF carries out the following checks.
a. Parity check: The SCIF checks whether the number of 1-bits in the receive data agrees with
b. Stop bit check: The SCIF checks whether the stop bit is 1. If there are two stop bits, only
c. Status check: The SCIF checks whether receive data can be transferred from the receive
d. Break check: The SCIF checks that the BRK flag is 0, indicating no break.
If all the above checks are passed, the receive data is stored in SCFRDR. If a receive error is
detected in the error check, the operation is as shown in table 14.11.
full interrupt (RXI) is requested.
If the RIE bit setting in SCSCR is 1 when the ORER, PER, or FER flag is set to 1, a receive-
error interrupt (ERI) is requested.
If the RIE bit setting in SCSCR is 1 when the BRK flag is set to 1, a break-receive interrupt
(BRI) is requested.
the parity (even or odd) set in the O/E bit in the serial mode register (SCSMR).
the first is checked.
shift register (SCRSR) to SCFRDR.
setting of the EI bit in SC2SSR determines whether reception is continued or halted when
a framing error or parity error occurs.
Also, as the RDF flag is not set to 1 when receiving, the error flags must be cleared to 0.
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