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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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AD9548/PCBZ Scheda tecnica(PDF) 44 Page - Analog Devices |
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AD9548/PCBZ Scheda tecnica(HTML) 44 Page - Analog Devices |
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44 / 112 page  AD9548 Rev. 0 | Page 44 of 112 STATUS AND CONTROL MULTIFUNCTION PINS (M0 TO M7) The AD9548 has eight digital CMOS I/O pins (M0 to M7) that are configurable for a variety of uses. The function of these pins is programmable via the register map. Each pin can control or monitor an assortment of internal functions based on the contents of Register 0200 to Register 0207. To monitor an internal function with a multifunction pin, write a Logic 1 to the most significant bit of the register associated with the desired multifunction pin. The value of the seven least significant bits of the register defines the control function, as shown in Table 24. Table 24. Multifunction Pin Output Functions, Register 0200 to Register 0207 (Bit 7 = 1) Bits[6:0] Value Output Function Source Proxy 0 Static Logic 0 1 Static Logic 1 2 System clock divided by 32 3 Watchdog timer output 4 EEPROM upload in progress Register 0D00, Bit 0 5 EEPROM download in progress Register 0D00, Bit 1 6 EEPROM fault detected Register 0D00, Bit 2 7 SYSCLK PLL lock detected Register 0D01, Bit 0 8 SYSCLK PLL calibration in progress Register 0D01, Bit 1 9 Unused 10 Unused 11 SYSCLK PLL stable Register 0D01, Bit 4 12 to 15 Unused 16 DPLL free running Register 0D0A, Bit 0 17 DPLL active Register 0D0A, Bit 1 18 DPLL in holdover Register 0D0A, Bit 2 19 DPLL in reference switchover Register 0D0A, Bit 3 20 Active reference: phase master Register 0D0A, Bit 6 21 DPLL phase locked Register 0D0A, Bit 4 22 DPLL frequency locked Register 0D0A, Bit 5 23 DPLL phase slew limited Register 0D0A, Bit 7 24 DPLL frequency clamped Register 0D0B, Bit 7 25 Tuning word history available Register 0D0B, Bit 6 26 Tuning word history updated Register 0D05, Bit 4 27 to 31 Unused 32 Reference A fault Register 0D0C, Bit 2 33 Reference AA fault Register 0D0D, Bit 2 Bits[6:0] Value Output Function Source Proxy 34 Reference B fault Register 0D0E, Bit 2 35 Reference BB fault Register 0D0F, Bit 2 36 Reference C fault Register 0D10, Bit 2 37 Reference CC fault Register 0D11, Bit 2 38 Reference D fault Register 0D12, Bit 2 39 Reference DD fault Register 0D13, Bit 2 40 to 47 Unused 48 Reference A valid Register 0D0C, Bit 3 49 Reference AA valid Register 0D0D, Bit 3 50 Reference B valid Register 0D0E, Bit 3 51 Reference BB valid Register 0D0F, Bit 3 52 Reference C valid Register 0D10, Bit 3 53 Reference CC valid Register 0D11, Bit 3 54 Reference D valid Register 0D12, Bit 3 55 Reference DD valid Register 0D13, Bit 3 56 to 63 Unused 64 Reference A active eference Register 0D0B, Bits[2:0] 65 Reference AA active reference Register 0D0B, Bits[2:0] 66 Reference B active reference Register 0D0B, Bits[2:0] 67 Reference BB active reference Register 0D0B, Bits[2:0] 68 Reference C active reference Register 0D0B, Bits[2:0] 69 Reference CC active reference Register 0D0B, Bits[2:0] 70 Reference D active reference Register 0D0B, Bits[2:0] 71 Reference DD active reference Register 0D0B, Bits[2:0] 72 to 79 Unused 80 Clock distribution sync pulse Register 0D03, Bit 3 81 to 127 Unused To control an internal function with a multifunction pin, write a Logic 0 to the most significant bit of the register associated with the desired multifunction pin. The monitored function depends on the value of the seven least significant bits of the register, as shown in Table 25. Table 25. Multifunction Pin Input Functions, Register 0200 to Register 0207 (Bit 7 = 0) Bits[6:0] Value Output Function Destination Proxy 0 Unused (default) 1 I/O update Register 0005, Bit 0 2 Full power-down Register 0A00, Bit 0 3 Watchdog reset Register 0A03, Bit 0 4 IRQ reset Register 0A03, Bit 1 |
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