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CY22801KFXIT Datasheet(PDF) 7 Page - Cypress Semiconductor |
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CY22801KFXIT Datasheet(HTML) 7 Page - Cypress Semiconductor |
7 / 23 page CY22801 Document #: 001-15571 Rev. *E Page 7 of 23 Table 4. Summary Table – CY22801 Programmable Registers Register Description D7 D6 D5 D4 D3 D2 D1 D0 09H CLKOE control 0 0 CLKC CLKA 0 CLKB 0 0 OCH DIV1SRC mux and DIV1N divider DIV1SRC DIV1N(6) DIV1N(5) DIV1N(4) DIV1N(3) DIV1N(2) DIV1N(1) DIV1N(0) 12H Input crystal oscillator drive control FTAAd- drSrc[1] FTAAd- drSrc[0] XCapSrc XDRV(1) XDRV(0) 0 0 0 13H Input load capacitor control CapLoad (7) CapLoad (6) CapLoad (5) CapLoad (4) CapLoad (3) CapLoad (2) CapLoad (1) CapLoad (0) 40H Charge pump and PB counter 1 1 0 Pump(2) Pump(1) Pump(0) PB(9) PB(8) 41H PB(7) PB(6) PB(5) PB(4) PB(3) PB(2) PB(1) PB(0) 42H PO counter, Q counter PO Q(6) Q(5) Q(4) Q(3) Q(2) Q(1) Q(0) 44H Crosspoint switch matrix control 11 11 11 CLKSRC2 for CLKB CLKSRC1 for CLKB 45H CLKSRC0 for CLKB 1 1 1 CLKSRC2 for CLKA CLKSRC1 for CLKA CLKSRC0 for CLKA CLKSRC2 for CLKC 46H CLKSRC1 for CLKC CLKSRC0 for CLKC 11 111 1 47H DIV2SRC mux and DIV2N divider DIV2SRC DIV2N(6) DIV2N(5) DIV2N(4) DIV2N(3) DIV2N(2) DIV2N(1) DIV2N(0) Table 5. Programmable Crystal Input Oscillator Gain Settings Cap Register Settings 00H – 80H 80H – C0H C0H – FFH Effective Load Capacitance (CapLoad) 6 pF to 12 pF 12 pF to 18 pF 18 pF to 30 pF Crystal ESR 30 Ω 60 Ω 30 Ω 60 Ω 30 Ω 60 Ω Crystal input frequency 8 to 15 MHz 00 01011001 10 15 to 20 MHz 01 10011010 10 20 to 25 MHz 01 10101010 11 25 to 30 MHz 10 10 10 11 11 N/A Table 6. Crystal Oscillator Gain Bit Locations and Values Address D7 D6 D5 D4 D3 D2 D1 D0 12H 001 XDRV(1) XDRV(0) 000 Table 7. Programmable External Reference Input Oscillator Drive Settings Reference Frequency 1 to 25 MHz 25 to 50 MHz 50 to 90 MHz 90 to 133 MHz Drive Setting 00 01 10 11 [+] Feedback |
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