H8S2245 datasheet(532/818 Pages) RENESAS

부품명	H8S2245

상세설명	Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series

PDF	818 Pages

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제조업체	RENESAS [Renesas Technology Corp]

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532 / 818 page

Section 13 Smart Card Interface

Rev.3.00 Mar. 26, 2007 Page 490 of 772

REJ09B0355-0300

13.3.6

Data Transfer Operations

Initialization

Before transmitting and receiving data, initialize the SCI as described below. Initialization is also

necessary when switching from transmit mode to receive mode, or vice versa.

[1] Clear the TE and RE bits in SCR to 0.

[2] Clear the error flags ERS, PER, and ORER in SSR to 0.

[3] Set the O/

E bit and CKS1 and CKS0 bits in SMR. Clear the C/A, CHR, and MP bits to 0, and

set the STOP and PE bits to 1.

[4] Set the SMIF, SDIR, and SINV bits in SCMR.

When the SMIF bit is set to 1, the TxD and RxD pins are both switched from ports to SCI pins,

and are placed in the high-impedance state.

[5] Set the value corresponding to the bit rate in BRR.

[6] Set the CKE0 bit in SCR. Clear the TIE, RIE, TE, RE, MPIE, TEIE and CKE1 bits to 0.

If the CKE0 bit is set to 1, the clock is output from the SCK pin.

[7] Wait at least one bit interval, then set the TIE, RIE, TE, and RE bits in SCR. Do not set the TE

bit and RE bit at the same time, except for self-diagnosis.

H8S2245 데이터시트(PDF) 532 Page - Renesas Technology Corp