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数据搜索系统，热门电子元器件搜索 |
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PC87366 数据表(PDF) 175 Page - National Semiconductor (TI) |
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PC87366 数据表(HTML) 175 Page - National Semiconductor (TI) |
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175 / 240 page  10.0 Musical Instrument Digital Interface (MIDI) Port (Continued) 175 www.national.com 10.3.6 MIDI Control Register (MCNTL) This register controls enhanced MIDI functions. Location: Offset 02h Type: R/W Bit 76543210 Name Loopback Mode Enable MIDI Thru Enable Reserved Pass-Thru Transmit Enable Rx Data Ready Interrupt Enable MDTX Pin Masking Enable Tx Buffer Empty Interrupt Enable Rx FIFO Enable for Pass-Thru Mode Reset 00001001 Required 0 Bit Description 7 Loopback Mode Enable. When enabled, the MIDI receive signal is internally connected to the MIDI transmit signal. 0: Disabled (default) 1: Enabled 6 MIDI Thru Enable. When enabled, the MDRX pin is internally connected to the MDTX pin, which then reflects the MIDI receive signal. When disabled, the MDTX pin is driven with data coming from the MIDI Port transmit engine. 0: Disabled (default) 1: Enabled 5 Reserved 4 Pass-Thru Transmit Enable. When enabled, data is transmitted in Pass-Thru (non-UART) mode. 0: Disabled (default) 1: Enabled 3 Rx Data Ready Interrupt Enable. When enabled, an interrupt request is asserted in response to a Receive Data Ready event. 0: Disabled 1: Enabled (default) 2 MDTX Pin Masking Enable. When enabled, the MDTX pin is constantly driven high by the MIDI Port. When disabled, MDTX serves as the MIDI Port transmit line. 0: Disabled (default) 1: Enabled 1 Tx Buffer Empty Interrupt Enable. When enabled, an interrupt request is asserted in response to a Transmit Buffer Empty event. 0: Disabled (default) 1: Enabled 0 Rx FIFO Enable for Pass-Thru Mode. When this bit is set to 1, the Receive FIFO is enabled in Pass-Thru mode. This bit is ignored in UART mode. 0: Disabled 1: Enabled (default) |
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