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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M306V2EEFS датащи(PDF) 246 Page - Renesas Technology Corp |
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M306V2EEFS датащи(HTML) 246 Page - Renesas Technology Corp |
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246 / 271 page  Rev.1.40 Oct 06, 2004 page 246 of 269 M306V2ME-XXXFP, M306V2EEFP 3.5 Timer B (timer mode, event counter mode) (1) Reading the timer Bi register while a count is in progress allows reading , with arbitrary timing, the value of the counter. Reading the timer Bi register with the reload timing gets “FFFF16”. Reading the timer Bi register after setting a value in the timer Bi register with a count halted but before the counter starts counting gets a proper value. 3.6 Timer B (pulse period, pulse width measurement mode) (1) If changing the measurement mode select bit is set after a count is started, the timer Bi interrupt request bit goes to “1”. (2) When the first effective edge is input after a count is started, an indeterminate value is transferred to the reload register. At this time, timer Bi interrupt request is not generated. 3.7 A-D Converter (1) Write to each bit (except bit 6) of A-D control register 0, to each bit of A-D control register 1, and to bit 0 of A-D control register 2 when A-D conversion is stopped (before a trigger occurs). In particular, when the Vref connection bit is changed from “0” to “1”, start A-D conversion after an elapse of 1 µs or longer. (2) When changing A-D operation mode, select analog input pin again. (3) When using A-D converter in the one-shot mode and in the single sweep mode After confirming the completion of A-D conversion, read the A-D register (the completion of A-D con- version is determined by A-D interrupt request bit). (4) When using A-D converter in the repeat mode and in the repeat sweep mode Use the main clock without dividing as the internal clock of CPU. (5) The A-D conversion in the sweep mode needs the time as follows; (number of sweep pins + 2 pins) ✕ repeat times ✕ A-D conversion time for 1 pin. (6) When operating OSD or operating data slicer using the HSYNC and VSYNC input, do not use the A-D sweap mode (single sweap mode, repeat sweap mode 0, and repeat sweap mode 1). 3.8 Stop Mode and Wait Mode ____________ (1) When returning from stop mode by hardware reset, RESET pin must be set to “L” level until main clock oscillation is stabilized. (2) When switching to either wait mode or stop mode, instructions occupying four bytes either from the WAIT instruction or from the instruction that sets the every-clock stop bit to “1“ within the instruction queue are perfected and then the program stops. So put at least four NOPs in succession either to the WAIT instruction or to the instruction that sets the every-clock stop bit to “1.” |
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