Datasheet

Table Of Contents
2011-2013 Microchip Technology Inc. DS41458C-page 209
PIC16(L)F1526/7
21.2.6 SPI OPERATION IN SLEEP MODE
In SPI Master mode, module clocks may be operating
at a different speed than when in Full-Power mode; in
the case of the Sleep mode, all clocks are halted.
Special care must be taken by the user when the
MSSPx clock is much faster than the system clock.
In Slave mode, when MSSPx interrupts are enabled,
after the master completes sending data, an MSSPx
interrupt will wake the controller from Sleep.
If an exit from Sleep mode is not desired, MSSPx
interrupts should be disabled.
In SPI Master mode, when the Sleep mode is selected,
all module clocks are halted and the transmis-
sion/reception will remain in that state until the device
wakes. After the device returns to Run mode, the mod-
ule will resume transmitting and receiving data.
In SPI 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
MSSPx interrupt flag bit will be set and if enabled, will
wake the device.
TABLE 21-1: SUMMARY OF REGISTERS ASSOCIATED WITH SPI OPERATION
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Register
on Page
ANSELF ANSF7 ANSF6 ANSF5 ANSF4 ANSF3 ANSF2 ANSF1 ANSF0
134
INTCON GIE PEIE
TMR0IE INTE IOCIE TMR0IF INTF IOCIF
78
PIE1
TMR1GIE ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE
79
PIE4
CCP10IE CCP9IE RC2IE TX2IE CCP8IE CCP7IE BCL2IE SSP2IE
82
PIR1
TMR1GIF ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF
83
PIR4
CCP10IF CCP9IF RC2IF TX2IF CCP8IF CCP7IF BCL2IF SSP2IF
86
SSP1BUF MSSPx Receive Buffer/Transmit Register 203*
SSP2BUF MSSPx Receive Buffer/Transmit Register 203*
SSP1CON1 WCOL SSPOV SSPEN CKP SSPM<3:0> 250
SSP2CON1 WCOL SSPOV SSPEN CKP SSPM<3:0> 250
SSP1CON3 ACKTIM PCIE SCIE BOEN SDAHT SBCDE AHEN DHEN 252
SSP2CON3 ACKTIM PCIE SCIE BOEN SDAHT SBCDE AHEN DHEN 252
SSP1STAT
SMP CKE D/A
PSR/WUA BF 248
SSP2STAT
SMP CKE D/A
PSR/WUA BF 248
TRISC
TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0
124
TRISD TRISD7 TRISD6 TRISD5 TRISD4
TRISD3 TRISD2 TRISD1 TRISD0
127
TRISF TRISF7
TRISF6 TRISF5 TRISF4 TRISF3 TRISF2 TRISF1 TRISF0
133
Legend: — = Unimplemented location, read as ‘0’. Shaded cells are not used by the MSSPx in SPI mode.
* Page provides register information.