HD64F3039F18 Datasheet, PDF (429/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

12.3.6 Data Transfer Operations
Section 12 Smart Card Interface
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 TxD₀ and RxD₀ 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 SCK₀ 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.
Rev.3.00 Mar. 26, 2007 Page 405 of 682
REJ09B0353-0300