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ST10F269ZX 数据表(PDF) 71 Page - STMicroelectronics |
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ST10F269ZX 数据表(HTML) 71 Page - STMicroelectronics |
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71 / 184 page  ST10F269 12 - PARALLEL PORTS 71/184 The pins of Port 2 combine internal bus data with alternate data output before the port latch input. 12.6 - Port 3 If this 15-bit port is used for general purpose I/O, the direction of each line can be configured by the corresponding direction register DP3. Most port lines can be switched into push-pull or open drain mode by the open drain control register ODP2 Figure 26 : Block Diagram of a Port 2 Pin Open Drain Latch Write ODP2.y Read ODP2.y Direction Latch Write DP2.y Read DP2.y MUX 0 1 Alternate Data Input Input Latch Clock P2.y CCyIO Output Buffer x = 7...0 Alternate Data Output MUX 0 1 Output Latch ≥ 1 Write Port P2.y Compare Trigger Read P2.y Fast External Interrupt Input EXxIN y = 15...0 |
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