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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SN8P1602A датащи(PDF) 52 Page - SONiX Technology Company |
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SN8P1602A датащи(HTML) 52 Page - SONiX Technology Company |
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52 / 76 page  SN8P1602B 8-Bit Micro-Controller SONiX TECHNOLOGY CO., LTD Page 52 Version 1.1 TC0C COUNTING REGISTER TC0C is an 8-bit counter register for the timer (TC0). TC0C must be reset whenever the TC0ENB is set to “1” to start the timer. TC0C is incremented each time a clock pulse of the frequency determined by TC0RATE0 ~ TC0RATE2. When TC0C has incremented to “0FFH”, it counts to “00H” an overflow generated. Under TC0 interrupt service request (TC0IEN) enable condition, the TC0 interrupt request flag will be set to “1” and the system executes the interrupt service routine. The TC0C has no auto reload function. After TC0C overflow, the TC0C is continuing counting. Users need to redefine the TC0C value to get an accurate time. 0DBH Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 TC0C TC0C7 TC0C6 TC0C5 TC0C4 TC0C3 TC0C2 TC0C1 TC0C0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W After reset 0 0 0 0 0 0 0 0 The basic timer table interval time of TC0 High speed mode (Fcpu = 3.58MHz / 4) Low speed mode (Fcpu = 32768Hz / 4) TC0RATE TC0CLOCK Max overflow interval One step = max/256 Max overflow interval One step = max/256 000 fcpu/256 73.2 ms 286us 8000 ms 31.25 ms 001 fcpu/128 36.6 ms 143us 4000 ms 15.63 ms 010 fcpu/64 18.3 ms 71.5us 2000 ms 7.8 ms 011 fcpu/32 9.15 ms 35.8us 1000 ms 3.9 ms 100 fcpu/16 4.57 ms 17.9us 500 ms 1.95 ms 101 fcpu/8 2.28 ms 8.94us 250 ms 0.98 ms 110 fcpu/4 1.14 ms 4.47us 125 ms 0.49 ms 111 fcpu/2 0.57 ms 2.23us 62.5 ms 0.24 ms The equation of TC0C initial value is as following. TC0C initial value = 256 - (TC0 interrupt interval time * input clock) Example: To set 10ms interval time for TC0 interrupt at 3.58MHz high-speed mode. TC0C value (74H) = 256 - (10ms * fcpu/64) TC0C initial value = 256 - (TC0 interrupt interval time * input clock) = 256 - (10ms * 3.58 * 106 / 4 / 64) = 256 - (10-2 * 3.58 * 106 / 4 / 64) = 116 = 74H |
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