HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 464

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Retransmission (Receive and Transmit Modes):
Retransmission by the SCI in Receive Mode: Figure 15.9 shows the retransmission operation in
the SCI receive mode.
1. When the received parity bit is checked and an error is found, the PER bit in SCSSR is
2. The RDRF bit in SCSSR is not set in the frame that caused the error.
3. When the received parity bit is checked and no error is found, the PER bit in SCSSR is not set.
4. When the received parity bit is checked and no error is found, reception is considered to have
5. When a normal frame is received, the pin maintains a three-state state when it transmits the
Rev. 4.00, 03/04, page 418 of 660
automatically set to 1. If the RIE bit in SCSCR is enabled at this time, an ERI interrupt is
requested. Be sure to clear the PER bit before the next parity bit is sampled.
been completed normally and the RDRF bit in SCSSR is automatically set to 1. If the RIE bit
in SCSCR is enabled at this time, an RXI interrupt is requested.
error signal.
Notes: 1.
RDRF
PER
Ds
D0
2.
3.
4.
5.
D1
This portion corresponds to the above explanation 1.
This portion corresponds to the above explanation 2.
This portion corresponds to the above explanation 3.
This portion corresponds to the above explanation 4.
This portion corresponds to the above explanation 5.
D2
nth transfer frame
D3
D4
D5
Figure 15.9 Retransmission in SCI Receive Mode
D6
D7
Dp DE
*
*
2
1
Ds
D0
D1
D2
Retransmitted frame
D3
D4
D5
D6
D7
Dp
(DE)
*
*
*
5
4
3
Ds
D0
Transfer frame n + 1
D1
D2
D3
D4