Sharp Blue Treak LH75400 User Manual

General Purpose Input/Output LH75400/01/10/11 (Preliminary) User’s Guide21-8 6/17/0321.2.3.5 Port C Data RegisterPCDR is the Port C Data Register. The active bits used in this register are Read/Write.Values written to PCDR are output on the PC pins if the corresponding PCDDR Data Direc-tion bits are set HIGH (port output).The values read from each bit of this register are determined by the value of the corre-sponding bit in the Port C Data Direction Register (see Section 21.2.3.7). A read from thisregister returns either:• The last bit value written if the bit is configured as an output.• The current value on the corresponding port input if the bit is configured as an input.A System Reset clears all bits.Table 21-11. PCDR RegisterBIT 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16FIELD ///RESET 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0RW R R R R R R R R R R R R R R R RBIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0FIELD /// Port C DataRESET 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0RW R R R R R R R R RW RW RW RW RW RW RW RWADDR 0xFFFDE000 + 0x00Table 21-12. PCDR Register DefinitionsBITS NAME FUNCTION31:8 /// Reserved Writing to these bits has no effect. Reading returns 0.7:0 Port C DataPort C Input/Output Data Specifies Port C input or output data, depend-ing on how the value of the corresponding bit in the PCDDDR Register is set(see Section 21.2.3.7).PCDDR set as output = PCDR sets the value on the GPIO Port C pins.PCDDR set as input = PCDR reads the value on the GPIO Port C pins.