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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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NSAM266SAA/V 数据表(PDF) 37 Page - National Semiconductor (TI) |
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NSAM266SAA/V 数据表(HTML) 37 Page - National Semiconductor (TI) |
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37 / 52 page  20 Software (Continued) Bits 5 – 7 0 To generate a single-frequency tone encode the bits as follows Bit 0 0 Bits 1 – 5 3–30 The value in bits 1 – 5 is multiplied by 100 to generate the required frequency (300 Hz – 3000 Hz) Bits 6 7 0 The CompactSPEECH does not check for the validity of the tone specification Invalid specifi- cation yields unpredictable results Example GT 0D20 Byte sequence Microcontroller 0D 20 CompactSPEECH 0D 20 Description Generate a single-frequency 1600 Hz tone GTD Get Time and Day time day option Returns the time and day as a 2-byte value time day option may be one of the following 0 Get the system time and day 1 Get the current message time-and-day stamp Any other time day option returns the time-and-day stamp of the current message Time of day is encoded as follows Bits 0 – 2 Day of the week (1 through 7) Bits 3 – 7 Hour of the day (0 through 23) Bits 8 – 13 Minute of the hour (0 through 59) Bits 14 – 15 00 The time was not set before the current message was recorded 11 The time was set ie the SETD (Set Time of Day) command was executed Note If the current message is undefined and time day option is 1 an ERR INVALID error is reported Example GTD 1 Byte sequence Microcontroller 0E 01 AA AA CompactSPEECH 0E 01 E8 29 Description Get the current message time-and-day stamp The CompactSPEECH responds that the message was created on the first day of the week at 540 AM The return value also indicates that the SETD command was used to set the system time and day before the message was recorded Note If the SAS command is used to announce the time-and-day stamp ‘‘Monday’’ is announced as the first day of the week For an external vocabulary the announcement depends on the vocabulary definition (See the IVS User’s Manual for more details) GTM Get Tagged Message tag ref tag mask dir Selects the current message according to instructions in dir to be the first nth next or nth previous message which complies with the equation message tag and tag mask e tag ref and tag mask where and is a bitwise AND operation dir is one of the following 0 Selects the first (oldest) message 128 Selects the last (newest) message n Selects the nth next message starting from the cur- rent message -n Selects the nth previous message starting from the current message Note To select the nth message with a given tag to be the current mes- sage you must first select the first message that complies with the above equation and then issue another GTM command with n b 1 as a parameter to skip to the nth message If a message is found it becomes the current message and 1 (TRUE) is returned If no message is found the current message remains unchanged and 0 (FALSE) is returned If dir is not 0 and the current message is undefined the return value is unpredictable After the command execution the current message may either remain undefined or change to any existing message The only exception is when the GTM command is exe- cuted just after the DM command (See the DM command descrip- tion for further detail) To access the nth message when n l 127 a sequence of GTM commands is required http www nationalcom 37 |
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