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PSD934210MIT 데이터시트(PDF) 37 Page - STMicroelectronics |
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PSD934210MIT 데이터시트(HTML) 37 Page - STMicroelectronics |
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37 / 89 page ![]() 37/89 PSD834F2V MCU BUS INTERFACE The “no-glue logic” MCU Bus Interface block can be directly connected to most popular MCUs and their control signals. Key 8-bit MCUs, with their bus types and control signals, are shown in Table 14. The interface type is specified using the PSD- soft Express Configuration. PSD Interface to a Multiplexed 8-Bit Bus. Fig- ure 16 shows an example of a system using a MCU with an 8-bit multiplexed bus and a PSD. The ADIO port on the PSD is connected directly to the MCU address/data bus. Address Strobe (ALE/AS, PD0) latches the address signals internally. Latched addresses can be brought out to Port A or B. The PSD drives the ADIO data bus only when one of its internal resources is accessed and Read Strobe (RD, CNTL1) is active. Should the system address bus exceed sixteen bits, Ports A, B, C, or D may be used as additional address inputs. Table 14. MCUs and their Control Signals Note: 1. Unused CNTL2 pin can be configured as CPLD input. Other unused pins (PC7, PD0, PA3-0) can be configured for other I/O func- tions. 2. ALE/AS input is optional for MCUs with a non-multiplexed bus MCU Data Bus Width CNTL0 CNTL1 CNTL2 PC7 PD02 ADIO0 PA3-PA0 PA7-PA3 8031 8 WR RD PSEN (Note 1) ALE A0 (Note 1) (Note 1) 80C51XA 8 WR RD PSEN (Note 1) ALE A4 A3-A0 (Note 1) 80C251 8 WR PSEN (Note 1) (Note 1) ALE A0 (Note 1) (Note 1) 80C251 8 WR RD PSEN (Note 1) ALE A0 (Note 1) (Note 1) 80198 8 WR RD (Note 1) (Note 1) ALE A0 (Note 1) (Note 1) 68HC11 8 R/W E (Note 1) (Note 1) AS A0 (Note 1) (Note 1) 68HC912 8 R/W E (Note 1) DBE AS A0 (Note 1) (Note 1) Z80 8 WR RD (Note 1) (Note 1) (Note 1) A0 D3-D0 D7-D4 Z8 8 R/W DS (Note 1) (Note 1) AS A0 (Note 1) (Note 1) 68330 8 R/W DS (Note 1) (Note 1) AS A0 (Note 1) (Note 1) M37702M2 8 R/W E (Note 1) (Note 1) ALE A0 D3-D0 D7-D4 |
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