h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 236
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h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
- Current page: 236 of 1165
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Section 8 Data Transfer Controller (DTC)
8.3.12
Normal Mode: An example is shown in which the DTC is used to receive 128 bytes of data via
the SCI.
[1] Set MRA to fixed source address (SM1 = SM0 = 0), incrementing destination address (DM1 =
[2] Set the start address of the register information at the DTC vector address.
[3] Set the corresponding bit in DTCER to 1.
[4] Set the SCI to the appropriate receive mode. Set the RIE bit in SCR to 1 to enable the
[5] Each time reception of one byte of data ends on the SCI, the RDRF flag in SSR is set to 1, an
[6] When CRA becomes 0 after the 128 data transfers have ended, the RDRF flag is held at 1, the
Rev. 5.00 Sep 22, 2005 page 210 of 1136
REJ09B0257-0500
1, DM0 = 0), normal mode (MD1 = MD0 = 0), and byte size (Sz = 0). The DTS bit can have
any value. Set MRB for one data transfer by one interrupt (CHNE = 0, DISEL = 0). Set the
SCI RDR address in SAR, the start address of the RAM area where the data will be received in
DAR, and 128 (H'0080) in CRA. CRB can be set to any value.
reception complete (RXI) interrupt. Since the generation of a receive error during the SCI
reception operation will disable subsequent reception, the CPU should be enabled to accept
receive error interrupts.
RXI interrupt is generated, and the DTC is activated. The receive data is transferred from RDR
to RAM by the DTC. DAR is incremented and CRA is decremented. The RDRF flag is
automatically cleared to 0.
DTCE bit is cleared to 0, and an RXI interrupt request is sent to the CPU. The interrupt
handling routine should perform wrap-up processing.
Examples of Use of the DTC
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