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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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P89C668 датащи(PDF) 36 Page - NXP Semiconductors |
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P89C668 датащи(HTML) 36 Page - NXP Semiconductors |
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36 / 89 page  Philips Semiconductors Product data P89C660/P89C662/P89C664/ P89C668 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/1KB/2KB/8KB RAM 2002 Oct 28 36 Table 9. Timer 2 Operating Modes RCLK + TCLK CP/RL2 TR2 MODE 0 0 1 16-bit Auto-reload 0 1 1 16-bit Capture 1 X 1 Baud rate generator X X 0 (off) OSC ÷ n* C/T2 = 0 C/T2 = 1 TR2 Control TL2 (8 BITS) TH2 (8 BITS) TF2 RCAP2L RCAP2H EXEN2 Control EXF2 Timer 2 Interrupt T2EX Pin Transition Detector T2 Pin Capture SU01252 * n = 6 in 6-clock mode, or 12 in 12-clock mode. Figure 21. Timer 2 in Capture Mode Not Bit Addressable Symbol Function — Not implemented, reserved for future use.* T2OE Timer 2 Output Enable bit. DCEN Down Count Enable bit. When set, this allows Timer 2 to be configured as an up/down counter depending on the value of the T2EX pin. — — — — — — T2OE DCEN SU01714 76 54 32 1 0 * User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features. In that case, the reset or inactive value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate. Bit T2MOD Address = 0C9H Reset Value = XXXX XX00B Figure 22. Timer 2 Mode (T2MOD) Control Register |
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