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ST10F280 数据表(PDF) 84 Page - STMicroelectronics |
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ST10F280 数据表(HTML) 84 Page - STMicroelectronics |
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84 / 186 page  ST10F280 84/186 12.5 - Port 3 If this 15-bit port is used for general purpose I/O, the direction of each line can be configured by the cor- responding direction register DP3. Most port lines can be switched into push/pull or open drain mode by the open drain control register ODP3 (pins P3.15, P3.14 and P3.12 do not support open drain mode). Due to pin limitations register bit P3.14 is not connected to an output pin. P3 (FFC4h / E2h) SFR Reset Value: 0000h DP3 (FFC6h / E3h) SFR Reset Value: 0000h ODP3 (F1C6h / E3h) SFR Reset Value: 0000h 15 14 13 12 11 10 9876543210 P3.15 - P3.13 P3.12 P3.11 P3.10 P3.9 P3.8 P3.7 P3.6 P3.5 P3.4 P3.3 P3.2 P3.1 P3.0 RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW Bit Function P3.y Port data register P3 bit y 15 14 13 12 11 10 9876543210 DP3 .15 - DP3 .13 DP3 .12 DP3 .11 DP3 .10 DP3.9 DP3.8 DP3.7 DP3.6 DP3.5 DP3.4 DP3.3 DP3.2 DP3.1 DP3.0 RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW Bit Function DP3.y Port direction register DP3 bit y DP3.y = 0: Port line P3.y is an input (high-impedance) DP3.y = 1: Port line P3.y is an output 15 14 13 12 11 10 9876543210 - - ODP3 .13 - ODP3 .11 ODP3 .10 ODP3 .9 ODP3 .8 ODP3 .7 ODP3 .6 ODP3 .5 ODP3 .4 ODP3 .3 ODP3 .2 ODP3 .1 ODP3 .0 RW RW RW RW RW RW RW RW RW RW RW RW RW Bit Function ODP3.y Port 3 Open Drain control register bit y ODP3.y = 0: Port line P3.y output driver in push-pull mode ODP3.y = 1: Port line P3.y output driver in open drain mode |
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