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ST10F280 Datasheet(PDF) 115 Page - STMicroelectronics |
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ST10F280 Datasheet(HTML) 115 Page - STMicroelectronics |
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115 / 239 page  ST10F280 Parallel ports Doc ID 8673 Rev. 3 115/239 Figure 37. Block diagram of pins P3.15 (CLKOUT) and P3.12 (BHE/WRH) Note: Enabling the BHE or WRH function automatically enables the P3.12 output driver. Setting bit DP3.12=’1’ is not required. During bus hold, pin P3.12 is switched back to its standard function and is then controlled by DP3.12 and P3.12. Keep DP3.12 = ’0’ in this case to ensure floating in hold mode. 12.6 Port 4 If this 8-bit port is used for general purpose I/O, the direction of each line can be configured via the corresponding direction register DP4. P4 Address: 0xFFC8h / E4h SFR Reset: 0x--00h Type: R/W 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - - - - - - - - P4.7 P4.6 P4.5 P4.4 P4.3 P4.2 P4.1 P4.0 R/W R/W R/W R/W R/W R/W R/W R/W P4.y Port data register P4 bit y |
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