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H8S/2240 数据表(PDF) 463 Page - Renesas Technology Corp |
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H8S/2240 数据表(HTML) 463 Page - Renesas Technology Corp |
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463 / 818 page ![]() Section 12 Serial Communication Interface (SCI) Rev.3.00 Mar. 26, 2007 Page 421 of 772 REJ09B0355-0300 Bit 0—Multiprocessor Bit Transfer (MPBT): When transmission is performed using multiprocessor format in asynchronous mode, MPBT stores the multiprocessor bit to be added to the transmit data. The MPBT bit setting is invalid in clocked synchronous mode, when multiprocessor format is not used, and when the operation is not transmission. Bit 0 MPBT Description 0 Data with a 0 multiprocessor bit is transmitted (Initial value) 1 Data with a 1 multiprocessor bit is transmitted 12.2.8 Bit Rate Register (BRR) 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3 1 R/W 0 1 R/W 2 1 R/W 1 1 R/W Bit Initial value R/W : : : BRR is an 8-bit register that sets the serial transfer bit rate in accordance with the baud rate generator operating clock selected by bits CKS1 and CKS0 in SMR. BRR can be read or written to by the CPU at all times. BRR is initialized to H'FF by a reset, and in standby mode or module stop mode. As baud rate generator control is performed independently for each channel, different values can be set for each channel. Table 12.3 shows sample BRR settings in asynchronous mode, and table 12.4 shows sample BRR settings in clocked synchronous mode. |
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