SH7018 Datasheet, PDF (270/431 Pages) Renesas Technology Corp – SuperH™ RISC engine

Initialization
(1)
Start transmitting/receive
Read TDRE bit in SSR1
(2)
No
TDRE = 1?
Yes
Write transmission data in TDR1
and clear TDRE bit of SSR1 to 0
Read ORER bit of SSR1
ORER = 1?
No
Yes
(3)
Error handling
Read RDRF bit of SSR1
(4)
No
RDRF = 1?
Yes
Read receive data of RDR1,
and clear RDRF bit of SSR1 to 0 ⁽⁵⁾
All
No
data transmitted/and
received
Yes
Clear TE and RE bits of SCR1 to 0
End transmission/reception
Figure 12.20 Sample Flowchart for Serial Transmission
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