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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT83SND2CMP3B датащи(PDF) 54 Page - ATMEL Corporation |
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AT83SND2CMP3B датащи(HTML) 54 Page - ATMEL Corporation |
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54 / 241 page  54 4341F–MP3–03/06 AT8xC51SND2C/MP3B Figure 11-3. Mode 0 Overflow Period Formula 11.3.2 Mode 1 (16-bit Timer) Mode 1 configures Timer 0 as a 16-bit Timer with TH0 and TL0 registers connected in cascade (see Figure 11-4). The selected input increments TL0 register. Figure 11-5 gives the overflow period calculation formula when in timer mode. Figure 11-4. Timer/Counter x (x = 0 or 1) in Mode 1 Figure 11-5. Mode 1 Overflow Period Formula 11.3.3 Mode 2 (8-bit Timer with Auto-Reload) Mode 2 configures Timer 0 as an 8-bit Timer (TL0 register) that automatically reloads from TH0 register (see Table 11-3). TL0 overflow sets TF0 flag in TCON register and reloads TL0 with the contents of TH0, which is preset by software. When the interrupt request is serviced, hardware clears TF0. The reload leaves TH0 unchanged. The next reload value may be changed at any time by writing it to TH0 register. Figure 11-7 gives the autoreload period calculation formula when in timer mode. Figure 11-6. Timer/Counter x (x = 0 or 1) in Mode 2 Figure 11-7. Mode 2 Autoreload Period Formula 6 ⋅ (16384 – (THx, TLx)) TFxPER = FTIMx TRx TCON Reg TFx TCON Reg 0 1 GATEx TMOD Reg Overflow Timer x Interrupt Request C/Tx# TMOD Reg TLx (8 bits) THx (8 bits) INTx Tx TIMx CLOCK ÷ 6 6 ⋅ (65536 – (THx, TLx)) TFxPER = FTIMx TRx TCON reg TFx TCON reg 0 1 GATEx TMOD reg Overflow Timer x Interrupt Request C/Tx# TMOD reg TLx (8 bits) THx (8 bits) INTx Tx TIMx CLOCK ÷ 6 TFxPER = FTIMx 6 ⋅ (256 – THx) |
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