SH7041A datasheet(561/923 Pages) RENESAS

Part #	SH7041A

Description	Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)

PDF	923 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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561 / 923 page

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Figure 14.17 is a sample flowchart for initializing the SCI.

1.Select the clock source in the serial control register (SCR).Leave RIE, TIE, TEIE, MPIE, TE,

and RE cleared to 0.

2.Select the communication format in the serial mode register (SMR).

3.Write the value corresponding to the bit rate in the bit rate register (BRR) unless an external

clock is used.

4.Wait for at least the interval required to transmit or receive one bit, then set TE or RE in the

serial control register (SCR) to 1. Also set RIE, TIE, TEIE, and MPIE. The TxD, RxD pins

becomes usable in response to the PFC corresponding bits and the TE, RE bit settings.

Start of initialization

Clear TE and RE bits to 0 in SCR

1-bit interval elapsed?

Set TE and RE to 1 in SCR;

Set RIE, TIE, TEIE, and MPIE bits

Yes

Set RIE, TIE, TEIE, MPIE, CKE1,

and CKE0 bits in SCR

(TE and RE are 0)

End

Wait

Select transmit/receive

format in SMR

Set value in BRR

Figure 14.17 Sample Flowchart for SCI Initialization

SH7041A Datasheet(PDF) 561 Page - Renesas Technology Corp