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SH7041A bảng dữ liệu(PDF) 511 Page - Renesas Technology Corp |
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SH7041A bảng dữ liệu(HTML) 511 Page - Renesas Technology Corp |
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511 / 923 page ![]() 473 The CPU cannot read or write the TSR directly. Bit: 7 6 5 4 3 2 1 0 R/W: — — — — — — — — 14.2.4 Transmit Data Register (TDR) The transmit data register (TDR) is an 8-bit register that stores data for serial transmission. When the SCI detects that the transmit shift register (TSR) is empty, it moves transmit data written in the TDR into the TSR and starts serial transmission. Continuous serial transmission is possible by writing the next transmit data in the TDR during serial transmission from the TSR. The CPU can always read and write the TDR. The TDR is initialized to H'FF by a power-on reset or in standby mode. Manual reset does not initialize TDR. Bit: 7 6 5 4 3 2 1 0 Initial value: 1 1 1 1 1 1 1 1 R/W: R/W R/W R/W R/W R/W R/W R/W R/W 14.2.5 Serial Mode Register (SMR) The serial mode register (SMR) is an 8-bit register that specifies the SCI serial communication format and selects the clock source for the baud rate generator. The CPU can always read and write the SMR. The SMR is initialized to H'00 by a power-on reset or in standby mode. Manual reset does not initialize SMR. Bit: 7 6 5 4 3 2 1 0 C/ A CHR PE O/ E STOP MP CKS1 CKS0 Initial value: 0 0 0 0 0 0 0 0 R/W: R/W R/W R/W R/W R/W R/W R/W R/W |
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