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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PSD833F2 датащи(PDF) 45 Page - STMicroelectronics |
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PSD833F2 датащи(HTML) 45 Page - STMicroelectronics |
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45 / 110 page  45/110 PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2 PSD Interface to a Non-Multiplexed 8-Bit Bus Figure 20 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. Data Byte Enable Reference MCUs have different data byte orientations. Table 17 shows how the PSD interprets byte/word oper- ations in different bus WRITE configurations. Even-byte refers to locations with address A0 equal to '0' and odd byte as locations with A0 equal to ’1.’ MCU Bus Interface Examples Figure 21 through 25 show examples of the basic connections between the PSD and some popular MCUs. The PSD Control input pins are labeled as to the MCU function for which they are configured. The MCU bus interface is specified using the PS- Dsoft Express Configuration. Table 17. Eight-Bit Data Bus Figure 20. An Example of a Typical 8-bit Non-Multiplexed Bus Interface BHE A0 D7-D0 X 0 Even Byte X 1 Odd Byte MCU WR RD BHE ALE RESET D [ 7:0] A[ 15:0] A[ 23:16] D [ 7:0] ADIO PORT PORT A PORT B PORT C WR (CNTRL0) RD (CNTRL1) BHE (CNTRL2) RST ALE (PD0) PORT D (OPTIONAL) PSD AI02879C |
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