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SMP9212 Fiches technique(PDF) 6 Page - Summit Microelectronics, Inc. |
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SMP9212 Fiches technique(HTML) 6 Page - Summit Microelectronics, Inc. |
6 / 10 page Advance Information page 6 of 6 SMP9210 SMP9211 SMP9212 SUMMIT MICROELECTRONICS, Inc. The third example illustrates the data sequence for a two-byte command. Special Configurations The SMP9210 can be configured by the end user or by Summit prior to shipment. There is one configuration register and it is accessed through the serial interface using 1001[b] as the device type address. The register is shown below. MSB LSB 7 6 5 4 3 2 1 0 A 3 A 2 A 1 A 0 L o r H Z P O R 1 P O R 0 L O C K x x x x x x x 0 Config Register Accessible x x x x x x x 1 Config Register Locked x x x x x 0 0 Power-on Recall all 0's x x x x x 0 1 Power-on Recall all 1's x x x x x 1 0 Power-on Recall Mid Scale x x x x x 1 1 Power-on Recall NV- Register x x x x 0 VOUT = Low Z on Power-Down x x x x 1 VOUT = High Z on Power-Down A A A A Programmable DAC Device Type Address Bit 0 - When bit 0 is written as a 1 the configuration register will be locked and it will become inaccessible for reading and writing. Bits 2:1 are use to select the power-on recall value to be loaded into the DAC registers. Bit 3 selects the power down option for the VOUT pins. Bits 7:4 can be used to program unique DAC device type identifiers. When the default 0101 is used the number of SMP9210's allowed on a single bus is limited to eight. This can be expanded infinitely if the CS input is also used. The only drawback is the decoding or use of port pins to drive the CS inputs. If we assume no other devices on the bus and that each DAC device type address is utilized, then the end user can effectively have 256 individually addressable devices on a single bus. Now, combining this capability with the CS pin a microC can enable blocks of 256 SMP9210's vs blocks of 8. |
Numéro de pièce similaire - SMP9212 |
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Description similaire - SMP9212 |
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