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PIC18F258-E/SOSQTP 数据表(PDF) 107 Page - Microchip Technology |
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PIC18F258-E/SOSQTP 数据表(HTML) 107 Page - Microchip Technology |
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107 / 402 page ![]() © 2006 Microchip Technology Inc. DS41159E-page 105 PIC18FXX8 REGISTER 9-1: TRISE REGISTER R-0 R-0 R/W-0 R/W-0 U-0 R/W-1 R/W-1 R/W-1 IBF OBF IBOV PSPMODE — TRISE2 TRISE1 TRISE0 bit 7 bit 0 bit 7 IBF: Input Buffer Full Status bit 1 = A word has been received and waiting to be read by the CPU 0 = No word has been received bit 6 OBF: Output Buffer Full Status bit 1 = The output buffer still holds a previously written word 0 = The output buffer has been read bit 5 IBOV: Input Buffer Overflow Detect bit (in Microprocessor mode) 1 = A write occurred when a previously input word has not been read (must be cleared in software) 0 = No overflow occurred bit 4 PSPMODE: Parallel Slave Port Mode Select bit 1 = Parallel Slave Port mode 0 = General Purpose I/O mode bit 3 Unimplemented: Read as ‘0’ bit 2 TRISE2: RE2 Direction Control bit 1 = Input 0 = Output bit 1 TRISE1: RE1 Direction Control bit 1 = Input 0 = Output bit 0 TRISE0: RE0 Direction Control bit 1 = Input 0 = Output Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown |
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