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DS21FT44 Datasheet(PDF) 7 Page - Dallas Semiconductor |
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DS21FT44 Datasheet(HTML) 7 Page - Dallas Semiconductor |
7 / 110 page DS21FT44/DS21FF44 7 of 110 2. MCM LEAD DESCRIPTION Lead Description Sorted by Symbol Table 2-1 Lead Symbol I/O Description B7 8MCLK O 8.192 MHz Clock Based on CLKSI. G20 A0 I Address Bus Bit 0 (lsb). H20 A1 I Address Bus Bit 1. G19 A2 I Address Bus Bit 2. H19 A3 I Address Bus Bit 3. G18 A4 I Address Bus Bit 4. H18 A5 I Address Bus Bit 5. G17 A6 I Address Bus Bit 6. H17 A7 I Address Bus Bit 7 (msb). W15 BTS I Bus Timing Select. 0 = Intel / 1 = Motorola. B6 CLKSI I Reference clock for the 8.192MHz clock synthesizer. T8 CS1* I Chip Select for Quad Framer 1. Y4 CS2* I Chip Select for Quad Framer 2. Y15 CS3* I Chip Select for Quad Framer 3. E19 CS4*/NC I Chip Select for Quad Framer 4. NC on Four x Three. L20 D0 I/O Data Bus Bit 0 (lsb). M20 D1 I/O Data Bus Bit 1. L19 D2 I/O Data Bus Bit 2. M19 D3 I/O Data Bus Bit 3. L18 D4 I/O Data Bus Bit 4. M18 D5 I/O Data Bus Bit 5. L17 D6 I/O Data Bus Bit 6. M17 D7 I/O Data Bus Bit 7 (msb). C7 DVDD1 – Digital Positive Supply for Framer 1. E4 DVDD1 – Digital Positive Supply for Framer 1. D2 DVDD1 – Digital Positive Supply for Framer 1. K3 DVDD2 – Digital Positive Supply for Framer 2. U7 DVDD2 – Digital Positive Supply for Framer 2. P2 DVDD2 – Digital Positive Supply for Framer 2. V19 DVDD3 – Digital Positive Supply for Framer 3. T12 DVDD3 – Digital Positive Supply for Framer 3. L16 DVDD3 – Digital Positive Supply for Framer 3. D17 DVDD4/NC – Digital Positive Supply for Framer 4. NC on Four x Three. F16 DVDD4/NC – Digital Positive Supply for Framer 4. NC on Four x Three. B11 DVDD4/NC – Digital Positive Supply for Framer 4. NC on Four x Three. E9 DVSS1 – Digital Signal Ground for Framer 1. A6 DVSS1 – Digital Signal Ground for Framer 1. D5 DVSS1 – Digital Signal Ground for Framer 1. U3 DVSS2 – Digital Signal Ground for Framer 2. K4 DVSS2 – Digital Signal Ground for Framer 2. |
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