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ST10F296 Datasheet(PDF) 174 Page - STMicroelectronics |
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ST10F296 Datasheet(HTML) 174 Page - STMicroelectronics |
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174 / 346 page  Obsolete Product(s) - Obsolete Product(s) Parallel ports ST10F296E 174/346 XPort 10 pins have a special port structure (see Figure 61) because the port is input only and because the analog input channels are directly connected to the pins rather than to the input latches. Figure 61. Block diagram of an XPort 10 pin 13.12.3 XPort 10 analog inputs disturb protection The XP10DIDIS, XP10DIDISSET, and XP10DIDISCLR registers are provided for additional disturb protection support on the analog inputs. Once one bit of any of the registers is set, the corresponding pin can no longer be used as general purpose input. XP10DIDIS register Read port XP10.y Input latch Clock XP10.y/AN(y+16) Read buffer To sample + hold circuit Channel select Analog switch y = 15 to 0 XP10DIDIS.y XP10DIDIS (EBD2h) XBus Reset value: 0000h 15 14 13 12 11 10 987 65432 10 XP1 0DI DIS .15 XP1 0DI DIS .14 XP1 0DI DIS .13 XP1 0DI DIS .12 XP1 0DI DIS .11 XP1 0DI DIS .10 XP1 0DI DIS .9 XP1 0DI DIS .8 XP1 0DI DIS .7 XP1 0DI DIS .6 XP1 0DI DIS .5 XP1 0DI DIS .4 XP1 0DI DIS .3 XP1 0DI DIS .2 XP1 0DI DIS .1 XP1 0DI DIS .0 RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW Table 113. XP10DIDIS register description Bit Bit name Function 15-0 XP10DIDIS.y XPort 10 digital disable register bit y 0: Port line XP10.y digital input is enabled (Schmitt trigger enabled) 1: Port line XP10.y digital input is disabled (Schmitt trigger disabled, necessary for input leakage current reduction). Obsolete Product(s) - Obsolete Product(s) |
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