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PIC18F258-E/SOSQTP 数据表(PDF) 153 Page - Microchip Technology |
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PIC18F258-E/SOSQTP 数据表(HTML) 153 Page - Microchip Technology |
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153 / 402 page  © 2006 Microchip Technology Inc. DS41159E-page 151 PIC18FXX8 17.3.8 SLEEP OPERATION In Master mode, all module clocks are halted and the transmission/reception will remain in that state until the device wakes from Sleep. After the device returns to normal mode, the module will continue to transmit/ receive data. In Slave mode, the SPI Transmit/Receive Shift register operates asynchronously to the device. This allows the device to be placed in Sleep mode and data to be shifted into the SPI Transmit/Receive Shift register. When all 8 bits have been received, the MSSP interrupt flag bit will be set and if enabled, will wake the device from Sleep. 17.3.9 EFFECTS OF A RESET A Reset disables the MSSP module and terminates the current transfer. 17.3.10 BUS MODE COMPATIBILITY Table 17-1 shows the compatibility between the standard SPI modes and the states of the CKP and CKE control bits. TABLE 17-1: SPI™ BUS MODES There is also an SMP bit which controls when the data is sampled. TABLE 17-2: REGISTERS ASSOCIATED WITH SPI™ OPERATION Standard SPI Mode Terminology Control Bits State CKP CKE 0, 0 0 1 0, 1 0 0 1, 0 1 1 1, 1 1 0 Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on POR, BOR Value on all other Resets INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u PIR1 PSPIF(1) ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000 PIE1 PSPIE(1) ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000 IPR1 PSPIP(1) ADIP RCIP TXIP SSPIP CCP1IP TMR2IP TMR1IP 1111 1111 1111 1111 TRISC PORTC Data Direction Register 1111 1111 1111 1111 TRISA — TRISA6 TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 -111 1111 -111 1111 SSPBUF Synchronous Serial Port Receive Buffer/Transmit Register xxxx xxxx uuuu uuuu SSPCON1 WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0 0000 0000 0000 0000 SSPSTAT SMP CKE D/A P S R/W UA BF 0000 0000 0000 0000 Legend: x = unknown, u = unchanged, - = unimplemented, read as ‘0’. Shaded cells are not used by the MSSP in SPI™ mode. Note 1: These registers or register bits are not implemented on the PIC18F248 and PIC18F258 and read as ‘0’s. |
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