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ST10F269ZX 数据表(PDF) 74 Page - STMicroelectronics |
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ST10F269ZX 数据表(HTML) 74 Page - STMicroelectronics |
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74 / 184 page  12 - PARALLEL PORTS ST10F269 74/184 When the on-chip peripheral associated with a Port 3 pin is configured to use both the alternate input and output function, the descriptions above apply to the respective current operating mode. The direction must be set accordingly. Port 3 pins with alternate input/output functions are: MTSR, MRST, RxD0 and SCLK. Note: Enabling the CLKOUT function automati- cally enables the P3.15 output driver. Set- ting bit DP3.15=’1’ is not required. Figure 28 : Block Diagram of Port 3 Pin with Alternate Input or Alternate Output Function Open Drain Latch Write ODP3.y Read ODP3.y Direction Latch Write DP3.y Read DP3.y MUX 0 1 Alternate Data Input Input Latch Clock P3.y Output Buffer y = 13, 11...0 Port Output Latch Read P3.y Write DP3.y & Alternate Data Output Port Data Output |
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