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PSD4235G2 数据表(PDF) 55 Page - STMicroelectronics |
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PSD4235G2 数据表(HTML) 55 Page - STMicroelectronics |
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55 / 93 page  PSD4000 Series Preliminary Information 52 The PSD4000 Functional Blocks (cont.) 9.4.5 Ports A, B and C – Functionality and Structure Ports A and B have similar functionality and structure, as shown in Figure 21. The two ports can be configured to perform one or more of the following functions: t MCU I/O Mode t GPLD Output – Combinatorial PLD outputs. t PLD Input – Input to the PLDs. t Address In – Additional high address inputs may be latched by ALE. t Open Drain/Slew Rate – pins PC[7:0]can be configured to fast slew rate, pins PA[7:0] and PB[7:0] can be configured to Open Drain Mode. DATA OUT REG. DQ DQ WR WR READ MUX GPLD OUTPUT P D B PLD INPUT DIR REG. DATA IN OUTPUT SELECT OUTPUT MUX PORT PIN DATA OUT Figure 21. Port A, B and C |
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