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PSD211R 数据表(PDF) 25 Page - STMicroelectronics |
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PSD211R 数据表(HTML) 25 Page - STMicroelectronics |
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25 / 51 page ![]() PSD211R Family 22 In Figure 12, the PSD211R is configured to interface with Motorola’s 68HC11, which is a 16-bit address/8-bit data bus microcontroller. Its data bus is multiplexed with the low-order address byte. The 68HC11 uses E and R/W signals to derive the read and write strobes. It uses the term AS (address strobe) for the address latch pulse. RESET is an active low signal. Only the necessary connections are shown. Figure 12. Interface With Motorola’s 68HC11 MICROCONTROLLER 20 21 22 23 24 25 43 45 47 49 44 46 48 50 34 33 32 31 30 29 28 27 52 51 23 24 25 26 27 28 29 30 31 32 33 35 36 37 38 39 22 2 13 3 1 PC0 PC1 PC2 PC3 PC4 PC5 PC6 PC7 PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7 E R/W AS RESET XIRQ IRQ MODB MODA PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7 PC0 PC1 PC2 A19/CSI 9 10 11 12 13 14 15 16 42 41 40 39 38 37 36 35 5 6 4 17 18 19 2 3 21 20 19 18 17 16 15 14 11 10 9 8 7 6 5 4 40 41 42 43 PD0 PD1 PD2 PD3 PD4 PD5 PE0 PE1 PE2 PE3 PD4 PE5 PE6 PE7 PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 VRH VRL AD0/A0 AD1/A1 AD2/A2 AD3/A3 AD4/A4 AD5/A5 AD6/A6 AD7/A7 AD8/A8 AD9/A9 AD10/A10 AD11/A11 AD12/A12 AD13/A13 AD14/A14 AD15/A15 E R/W/VPP AS RESET PSEN GND PSD211R 34 12 VCC VCC 68HC11 XTAL EXTAL 44 0.1µF Reset 14.0 System Applications (cont.) |
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