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ZL30120GGG Datasheet(PDF) 7 Page - Zarlink Semiconductor Inc |
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ZL30120GGG Datasheet(HTML) 7 Page - Zarlink Semiconductor Inc |
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7 / 27 page  ZL30120 Data Sheet 7 Zarlink Semiconductor Inc. J10 p1_clk0 O Programmable Synthesizer 1 - Output Clock 0 (LVCMOS). This output can be configured to provide any frequency with a multiple of 8 kHz up to 100 MHz in addition to 2 kHz. The default frequency for this output is 1.544 MHz (DS1). K10 p1_clk1 O Programmable Synthesizer1 - Output Clock 1 (LVCMOS). This is a programmable clock output configurable as a multiple or division of the p1_clk0 frequency within the range of 2 kHz to 100 MHz. The default frequency for this output is 3.088 MHz (2x DS1). H10 fb_clk O Feedback Clock (LVCMOS). This output is a buffered copy of the feedback clock for DPLL1. The frequency of this output always equals the frequency of the selected reference. E1 dpll2_ref O DPLL2 Selected Output Reference (LVCMOS). This is a buffered copy of the output of the reference selector for DPLL2. Switching between input reference clocks at this output is not hitless. Control H5 rst_b I Reset (LVCMOS, Schmitt Trigger). A logic low at this input resets the device. To ensure proper operation, the device must be reset after power-up. Reset should be asserted for a minimum of 300 ns. J5 dpll1_hs_en Iu DPLL1 Hitless Switching Enable (LVCMOS, Schmitt Trigger). A logic high at this input enables hitless reference switching. A logic low disables hitless reference switching and re-aligns DPLL1’s output phase to the phase of the selected reference input. This feature can also be controlled through software registers. This pin is internally pulled up to Vdd. C2 D2 dpll1_mod_sel0 dpll1_mod_sel1 Iu DPLL1 Mode Select 1:0 (LVCMOS, Schmitt Trigger). During reset, the levels on these pins determine the default mode of operation for DPLL1 (Automatic, Normal, Holdover or Freerun). After reset, the mode of operation can be controlled directly with these pins, or by accessing the dpll1_modesel register through the serial interface. This pin is internally pulled up to Vdd. Status H1 dpll1_lock O Lock Indicator (LVCMOS). This is the lock indicator pin for DPLL1. This output goes high when DPLL1’s output is frequency and phase locked to the input reference. J1 dpll1_holdover O Holdover Indicator (LVCMOS). This pin goes high when DPLL1 enters the holdover mode. Serial Interface E2 sck I Clock for Serial Interface (LVCMOS). Serial interface clock. F1 si I Serial Interface Input (LVCMOS). Serial interface data input pin. G1 so O Serial Interface Output (LVCMOS). Serial interface data output pin. E3 cs_b Iu Chip Select for Serial Interface (LVCMOS). Serial interface chip select. This pin is internally pulled up to Vdd. Pin # Name I/O Type Description |
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