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ST10F296 データシート(PDF) 169 Page - STMicroelectronics |
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ST10F296 データシート(HTML) 169 Page - STMicroelectronics |
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169 / 346 page  Obsolete Product(s) - Obsolete Product(s) ST10F296E Parallel ports 169/346 13.11 XPort 9 XPort 9 is enabled by setting the XPEN and XPORTEN bits of the SYSCON and XPERCON registers respectively. On the XBus interface, the registers are not bit-addressable. This 16-bit port is used for general purpose I/O. The direction of each line can be configured via the corresponding direction register XDP9. Each port line can be switched into push-pull or open-drain output mode via the open-drain control register XODP9. The port lines can also be switeched into TTL/CMOS input through the input threshold control register XPICON9 (Section 13.1.2: Input threshold control on page 121). All port lines can be individually (bit-wise) programmed. The ‘bit-addressable’ feature is available via specific ‘set’ and ‘clear’ registers: XP9SET, XP9CLR, XDP9SET, XDP9CLR, XODP9SET, XODP9CLR, XPICON9SET, and XPICON9CLR. 13.11.1 XPort 9 registers XP9 register XP9SET register XP9 (EB80h) XBus Reset value: 0000h 15 14 13 12 11 10 987 65432 10 XP9 .15 XP9 .14 XP9 .13 XP9 .12 XP9 .11 XP9 .10 XP9 .9 XP9 .8 XP9 .7 XP9 .6 XP9 .5 XP9 .4 XP9 .3 XP9 .2 XP9 .1 XP9 .0 RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW Table 102. XP9 register description Bit Bit name Function 15-0 XP9.y Port data register XP9 bit y XP9SET (EB82h) XBus Reset value: 0000h 15 14 13 12 11 10 987 65432 10 XP9 SET .15 XP9 SET .14 XP9 SET .13 XP9 SET .12 XP9 SET .11 XP9 SET .10 XP9 SET .9 XP9 SET .8 XP9 SET .7 XP9 SET .6 XP9 SET .5 XP9 SET .4 XP9 SET .3 XP9 SET .2 XP9 SET .1 XP9 SET .0 WWWWW WWW W WWWWW WW Table 103. XP9SET register description Bit Bit name Function 15-0 XP9SET.y Writing a 1 sets the corresponding bit of the XP9.y register. Writing a 0 has no effect. Obsolete Product(s) - Obsolete Product(s) |
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