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HMA510883 Datasheet(PDF) 3 Page - Intersil Corporation |
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HMA510883 Datasheet(HTML) 3 Page - Intersil Corporation |
3 / 9 page ![]() 3-12 SUB I Subtract Control. When both SUB and ACC are HIGH, the Accumulator Register contents are sub- tracted from the current product. When ACC is HIGH and SUB is LOW, the Accumulator Register contents and the current product are summed. The SUB control input is latched on the rising edge of CLKX or CLKY. RND I Round Control. When this control is HIGH, a one is added to the most significant bit of the LSP. When LOW, the product is unchanged. PREL I Preload Control. When this control is HIGH, the three bidirectional ports may be used to preload the Accumulator Registers. The three-state controls (OEX, OEM, OEL) must be HIGH, and the data will be preloaded on the rising edge of CLKP. When this control is LOW, the Accumulator Registers func- tion in a normal manner. OEL I Y-Input/LSP Output Port Three-State Control. When OEL is HIGH, the output drivers are in the high impedance state. This state is required for Y-data input or preloading the LSP Register. When OEL is LOW, the port is enabled for LSP output. OEM I MSP Output Port Three-State Control. A LOW on this control line enables the port for output. When OEM is HIGH, the output drivers are in the high impedance state. This control must be HIGH for preloading the MSP Register. OEX I XTP Output Port Three-State Control. A LOW on this control line enables the port for output. When OEX is HIGH, the output drivers are in the high impedance state. This control must be HIGH for pre- loading the XTP Register. CLKX I X-Register Clock. The rising edge of this clock latches the X-Data Input Register along with the TC, ACC, SUB and RND inputs. CLKY I Y-Register Clock. The rising edge of this clock latches the Y-Data Input Register along with the TC, ACC, SUB and RND inputs. CLKP I Product Register Clock. The rising edge of CLKP latches the LSP, MSP and XTP Registers. If the preload control is active, the data on the I/O ports is loaded into these registers. If preload is not ac- tive, the accumulated product is loaded into the registers. Pin Descriptions (Continued) NAME TYPE DESCRIPTION HMA510/883 |
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