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PSD834210MIT 数据表(PDF) 38 Page - STMicroelectronics |
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PSD834210MIT 数据表(HTML) 38 Page - STMicroelectronics |
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38 / 89 page  PSD834F2V 38/89 Figure 16. An Example of a Typical 8-bit Multiplexed Bus Interface PSD Interface to a Non-Multiplexed 8-Bit Bus. Figure 17 shows an example of a system using a MCU with an 8-bit non-multiplexed bus and a PSD. The address bus is connected to the ADIO Port, and the data bus is connected to Port A. Port A is in tri-state mode when the PSD is not access- ed by the MCU. Should the system address bus exceed sixteen bits, Ports B, C, or D may be used for additional address inputs. MCU WR RD BHE ALE RESET AD [ 7:0] A[ 15:8] A[ 15: 8] A[ 7: 0] ADIO PORT PORT A PORT B PORT C WR (CNTRL0) RD (CNTRL1) BHE (CNTRL2) RST ALE (PD0) PORT D (OPTIONAL) (OPTIONAL) PSD AI02878C |
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