Microchip Technology MA330019 데이터 시트
dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
DS70291G-page 236
© 2007-2012 Microchip Technology Inc.
REGISTER 18-2:
SPI
X
CON1: SPIx CONTROL REGISTER 1
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
DISSCK
DISSDO
MODE16
SMP
CKE
(1)
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
SSEN
(3)
CKP
MSTEN
SPRE<2:0>
(2)
PPRE<1:0>
(2)
bit 7
bit 0
Legend:
R = Readable bit
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
bit 15-13
Unimplemented: Read as ‘0’
bit 12
DISSCK: Disable SCKx Pin bit (SPI Master modes only)
1 = Internal SPI clock is disabled, pin functions as I/O
0 = Internal SPI clock is enabled
1 = Internal SPI clock is disabled, pin functions as I/O
0 = Internal SPI clock is enabled
bit 11
DISSDO: Disable SDOx Pin bit
1 = SDOx pin is not used by module; pin functions as I/O
0 = SDOx pin is controlled by the module
1 = SDOx pin is not used by module; pin functions as I/O
0 = SDOx pin is controlled by the module
bit 10
MODE16: Word/Byte Communication Select bit
1 = Communication is word-wide (16 bits)
0 = Communication is byte-wide (8 bits)
1 = Communication is word-wide (16 bits)
0 = Communication is byte-wide (8 bits)
bit 9
SMP: SPIx Data Input Sample Phase bit
Master mode:
1 = Input data sampled at end of data output time
0 = Input data sampled at middle of data output time
Slave mode:
SMP must be cleared when SPIx is used in Slave mode.
Master mode:
1 = Input data sampled at end of data output time
0 = Input data sampled at middle of data output time
Slave mode:
SMP must be cleared when SPIx is used in Slave mode.
bit 8
CKE: SPIx Clock Edge Select bit
(1)
1 = Serial output data changes on transition from active clock state to Idle clock state (see bit 6)
0 = Serial output data changes on transition from Idle clock state to active clock state (see bit 6)
0 = Serial output data changes on transition from Idle clock state to active clock state (see bit 6)
bit 7
SSEN: Slave Select Enable bit (Slave mode)
(3)
1 = SSx pin used for Slave mode
0 = SSx pin not used by module. Pin controlled by port function
0 = SSx pin not used by module. Pin controlled by port function
bit 6
CKP: Clock Polarity Select bit
1 = Idle state for clock is a high level; active state is a low level
0 = Idle state for clock is a low level; active state is a high level
1 = Idle state for clock is a high level; active state is a low level
0 = Idle state for clock is a low level; active state is a high level
bit 5
MSTEN: Master Mode Enable bit
1 = Master mode
0 = Slave mode
1 = Master mode
0 = Slave mode
Note 1: This bit is not used in Framed SPI modes. Program this bit to ‘0’ for the Framed SPI modes (FRMEN = 1).
2: Do not set both Primary and Secondary prescalers to a value of 1:1.
3: This bit must be cleared when FRMEN = 1.
3: This bit must be cleared when FRMEN = 1.