R5F61525 RENESAS [Renesas Technology Corp], R5F61525 Datasheet - Page 471
R5F61525
Manufacturer Part Number
R5F61525
Description
32-Bit CISC Microcomputer H8SX Family H8SX/1500 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.R5F61525.pdf
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12.7.5
Before transmitting and receiving data, initialize the SCI using the following procedure.
Initialization is also necessary before switching from transmission to reception and vice versa.
1. Clear the TE and RE bits in SCR to 0.
2. Set the ICR bit of the corresponding pin to 1.
3. Clear the error flags ERS, PER, and ORER in SSR to 0.
4. Set the GM, BLK, O/E, BCP1, BCP0, CKS1, and CKS0 bits in SMR appropriately. Also set
5. Set the SMIF, SDIR, and SINV bits in SCMR appropriately. When the DDR corresponding to
6. Set the value corresponding to the bit rate in BRR.
7. Set the CKE1 and CKE0 bits in SCR appropriately. Clear the TIE, RIE, TE, RE, MPIE, and
8. Set the TIE, RIE, TE, and RE bits in SCR appropriately after waiting for at least a 1-bit
To switch from reception to transmission, first verify that reception has completed, then initialize
the SCI. At the end of initialization, RE and TE should be set to 0 and 1, respectively. Reception
completion can be verified by reading the RDRF, PER, or ORER flag. To switch from
transmission to reception, first verify that transmission has completed, then initialize the SCI. At
the end of initialization, TE and RE should be set to 0 and 1, respectively. Transmission
completion can be verified by reading the TEND flag.
the PE bit to 1.
the TxD pin is cleared to 0, the TxD and RxD pins are changed from port pins to SCI pins,
placing the pins into high impedance state.
TEIE bits to 0 simultaneously.
When the CKE0 bit is set to 1, the SCK pin is allowed to output clock pulses.
interval. Setting the TE and RE bits to 1 simultaneously is prohibited except for self diagnosis.
Initialization
Section 12 Serial Communication Interface (SCI)
Rev. 3.00 Mar. 14, 2006 Page 433 of 804
REJ09B0104-0300
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