H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 632
H8S-2350
Manufacturer Part Number
H8S-2350
Description
16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.H8S-2350.pdf
(1025 pages)
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Section 13 Serial Communication Interface (SCI)
Serial data transmission (clocked synchronous mode): Figure 13.16 shows a sample flowchart
for serial transmission.
The following procedure should be used for serial data transmission.
Rev. 3.00 Sep 15, 2006 page 598 of 988
REJ09B0330-0300
Write transmit data to TDR and
clear TDRE flag in SSR to 0
Read TDRE flag in SSR
Read TEND flag in SSR
Clear TE bit in SCR to 0
All data transmitted?
Start transmission
Initialization
TDRE = 1
TEND = 1
<End>
Figure 13.16 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
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 DMAC or
DTC is activated by a transmit data
empty interrupt (TXI) request and data
is written to TDR.
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