h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 433
h8s-2649
Manufacturer Part Number
h8s-2649
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2649.pdf
(766 pages)
- Current page: 433 of 766
- Download datasheet (5Mb)
Write transmit data to TDR and
clear TDRE flag in SSR to 0
Clear TE bit in SCR to 0
Read TDRE flag in SSR
Read TEND flag in SSR
All data transmitted?
Start transmission
Initialization
TDRE = 1
TEND = 1
<End>
Figure 13.17 Sample Serial Transmission Flowchart
Yes
Yes
Yes
No
No
No
[3]
[2]
[1]
[1] SCI initialization:
[2] SCI status check and transmit data
[3] Serial transmission continuation
Section 13 Serial Communication Interface (SCI)
The TxD pin is automatically
designated as the transmit data output
pin.
write:
Read SSR and check that the TDRE
flag is set to 1, then write transmit data
to TDR and clear the TDRE flag to 0.
procedure:
To continue serial transmission, be
sure to read 1 from the TDRE flag to
confirm that writing is possible, then
write data to TDR, and then clear the
TDRE flag to 0.
Checking and clearing of the TDRE
flag is automatic when the DTC is
activated by a transmit data empty
interrupt (TXI) request and data is
written to TDR.
Rev. 2.00 Dec. 05, 2005 Page 395 of 724
REJ09B0200-0200
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