HD64336901G Renesas Technology, HD64336901G Datasheet - Page 238

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

Rev. 1.00, 11/03, page 210 of 376
Figure 14.12 Sample Serial Transmission Flowchart (Clocked Synchronous Mode)
[1]
[2]
Write transmit data to TDR
Clear TE bit in SCR3 to 0
Read TDRE flag in SSR
Read TEND flag in SSR
All data transmitted?
Start transmission
TDRE = 1
TEND = 1
<End>
Yes
Yes
No
Yes
No
No
[1]
[2]
Read SSR and check that the TDRE flag is
set to 1, then write transmit data to TDR.
When data is written to TDR, the TDRE flag
is automatically cleared to 0 and clocks are
output to start the data transmission.
To continue serial transmission, be sure to
read 1 from the TDRE flag to confirm that
writing is possible, then write data to TDR.
When data is written to TDR, the TDRE flag
is automatically cleared to 0.