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MT9040AN Datasheet(PDF) 2 Page - Zarlink Semiconductor Inc |
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MT9040AN Datasheet(HTML) 2 Page - Zarlink Semiconductor Inc |
2 / 27 page MT9040 Data Sheet 2 Zarlink Semiconductor Inc. Figure 2 - Pin Connections Pin Description Pin # Name Description 1,10, 23,31 VSS Ground. 0 Volts. (Vss pads). 2 RST Reset (Input). A logic low at this input resets the MT9040. To ensure proper operation, the device must be reset after reference signal frequency changes and power-up. The RST pin should be held low for a minimum of 300ns. While the RST pin is low, all frame pulses except RST and TSP and all clock outputs except C6o, C16o and C19o are at logic high. The RST, TSP, C6o and C16o are at logic low during reset. The C19o is free-running during reset. Following a reset, the input reference source and output clocks and frame pulses are phase aligned as shown in Figure 9. 3,4,5, 38,43 IC Internal Connection. Leave open circuit. 6REF Reference (Input). This is the input reference source (falling edge) used for synchronization. One of four possible frequencies (8kHz, 1.544MHz, 2.048MHz or 19.44MHz) may be used. 7,17 28,35 VDD Positive Supply Voltage. +3.3VDC nominal. 8OSCo Oscillator Master Clock (CMOS Output). For crystal operation, a 20MHz crystal is connected from this pin to OSCi, see Figure 6. Not suitable for driving other devices. For clock oscillator operation, this pin is left unconnected, see Figure 5. 9OSCi Oscillator Master Clock (CMOS Input). For crystal operation, a 20MHz crystal is connected from this pin to OSCo, see Figure 6. For clock oscillator operation, this pin is connected to a clock source, see Figure 5. 11 F16o Frame Pulse ST-BUS 8.192 Mb/s (CMOS Output). This is an 8kHz 61ns active low framing pulse, which marks the beginning of an ST-BUS frame. This is typically used for ST-BUS operation at 8.192 Mb/s. See Figure 11. 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 TRST TDI TDO IC IC FS1 FS2 IC IC IC MS Vdd IC IC NC Vss IC IM Vdd RST IC IC REF Vdd OSCo OSCi Vss F16o TSP F8o C1.5o C2o C4o C19o 48 TMS VSS 21 27 C6o FLOCK 22 26 Vss 23 25 C8o IC 24 C16o MT9040AN TCK RSP F0o IC Vdd LOCK |
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