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PDSP1601MCGGCR Datasheet(PDF) 3 Page - Mitel Networks Corporation |
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PDSP1601MCGGCR Datasheet(HTML) 3 Page - Mitel Networks Corporation |
3 / 17 page PDSP1601/PDSP1601A 3 Symbol MSB MSS B15 - B0 CEB CLK MSA0 - MSA1 A15 - A0 CEA MSC IS0 - IS3 SV0 - SV3 SVOE RS0, RS1 RS2 C0 - C15 OE BFP CO RA0 - RA2 CI IA0 - IA3 IA4 Vcc GND Description ALU B-input multiplexer select control.1 This input is latched internally on the rising edge of CLK. Shifter Input multiplexer select control.1 This input is latched internally on the rising edge of CLK. B Port data input. Data presented to this port is latched into the input register on the rising edge of CLK. B15 is the MSB. Clock enable, B Port input register. When low the clock to this register is enabled. Common clock to all internal registered elements. All registers are loaded, and outputs change on the rising edge of CLK. ALU A-input multiplexer select control.1 These inputs are latched internally on the rising edge of CLK. A Port data input. Data presented to this port is latched into the input register on the rising edge of CLK. A15 is the MSB. Clock enable, A Port input register. When low the clock to this register is enabled. C-Port multiplexer select control.1 This input is latched internally on the rising edge of CLK. Instruction inputs to Barrel Shifter, IS3 = MSB.1 These inputs are latched internally on the rising edge of CLK. Shift Value I/O Port. This port is used as an input when shift values are supplied from external sources, and as an output when Normalise operations are invoked. The I/O functions are determined by the IS0 - IS3 instruction inputs, and by the SVOE control. The shift value is latched internally on the rising edge of CLK. SV Output enable. When high the SV port can only operate as an input. When low the SV port can act as an input or as an output, according to the IS0 - IS3 instruction. This pin should be tied hihg or low, depending upon the application. Instruction inputs to Barrel Shifter registers.1 These inputs are latched internally on the rising edge of CLK. C Port data output. Data output on this port is selected by the C output multiplexer. C15 is the MSB. Output enable. The C Port outputs are in high impedance condition when this control is high. Block Floating Point Flag from ALU, active high. Carry out from MSB of ALU. Instruction inputs to ALU registers.1 These inputs are latched internally on the rising edge of CLK. Carry in to LSB of ALU. Instruction inputs to ALU.1 IA4 = MSB. These inputs are latched internally on the rising edge of CLK. +5V supply: Both Vcc pins must be connected. 0V supply: Both GND pins must be connected. PIN DESCRIPTIONS NOTES 1. All instructions are executed in the cycle commencing with the rising edge of the CLK which latches the inputs. |
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