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ST10F296 数据表(PDF) 138 Page - STMicroelectronics |
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ST10F296 数据表(HTML) 138 Page - STMicroelectronics |
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138 / 346 page  Obsolete Product(s) - Obsolete Product(s) Parallel ports ST10F296E 138/346 13.5 Port 3 If this 15 bit port is used for general purpose I/O, the direction of each line can be configured by the corresponding 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 and P3.12 do not support open-drain mode). Due to pin limitations, register bit P3.14 is not connected to any output pin. 13.5.1 Port 3 registers P3 register DP3 register P3 (FFC4h/E2h) SFR Reset value: 0000h 15 14 13 12 11 10 987 65432 10 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 Table 77. P3 register description Bit Bit name Function 15, 13-0 P3.y Port data register P3 bit y DP3 (FFC6h/E3h) SFR Reset value: 0000h 15 14 13 12 11 10 987 65432 10 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 - RWRWRWRW RWRW RW RW RW RW RW RW RW RW Table 78. DP3 register description Bit Bit name Function 15, 13-0 DP3.y Port direction register DP3 bit y 0: Port line P3.y is an input (high impedance) 1: Port line P3.y is an output Obsolete Product(s) - Obsolete Product(s) |
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