Datasheet

Table Of Contents
© 2011 Microchip Technology Inc. DS70143E-page 93
dsPIC30F6011A/6012A/6013A/6014A
14.3 Slave Select Synchronization
The SSx pin allows a Synchronous Slave mode. The
SPI must be configured in SPI Slave mode with SSx
pin
control enabled (SSEN = 1). When the SSx pin is low,
transmission and reception are enabled and the SDOx
pin is driven. When SSx
pin goes high, the SDOx pin is
no longer driven. Also, the SPI module is re-
synchronized, and all counters/control circuitry are
reset. Therefore, when the SSx
pin is asserted low
again, transmission/reception will begin at the MSb
even if SSx
had been deasserted in the middle of a
transmit/receive.
14.4 SPI Operation During CPU Sleep
Mode
During Sleep mode, the SPI module is shutdown. If the
CPU enters Sleep mode while an SPI transaction is in
progress, then the transmission and reception is
aborted.
The transmitter and receiver will stop in Sleep mode.
However, register contents are not affected by entering
or exiting Sleep mode.
14.5 SPI Operation During CPU Idle
Mode
When the device enters Idle mode, all clock sources
remain functional. The SPISIDL bit (SPIxSTAT<13>)
selects if the SPI module will stop or continue on Idle. If
SPISIDL = 0, the module will continue to operate when
the CPU enters Idle mode. If SPISIDL = 1, the module
will stop when the CPU enters Idle mode.