pic16c61 Microchip Technology Inc., pic16c61 Datasheet - Page 85
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pic16c61
Manufacturer Part Number
pic16c61
Description
8-bit Cmos Microcontrollers Technology
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16C61.pdf
(336 pages)
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FIGURE 11-2: SSPCON: SYNC SERIAL PORT CONTROL REGISTER (ADDRESS 14h)
1997 Microchip Technology Inc.
bit7
bit 7:
bit 6:
bit 5:
bit 4:
bit 3-0: SSPM3:SSPM0: Synchronous Serial Port Mode Select bits
WCOL
R/W-0
WCOL: Write Collision Detect bit
1 = The SSPBUF register is written while it is still transmitting the previous word
(must be cleared in software)
0 = No collision
SSPOV: Receive Overflow Detect bit
In SPI mode
1 = A new byte is received while the SSPBUF register is still holding the previous data. In case of overflow,
the data in SSPSR register is lost. Overflow can only occur in slave mode. The user must read the SSP-
BUF, even if only transmitting data, to avoid setting overflow. In master mode the overflow bit is not set
since each new reception (and transmission) is initiated by writing to the SSPBUF register.
0 = No overflow
In I
1 = A byte is received while the SSPBUF register is still holding the previous byte. SSPOV is a "don’t care"
in transmit mode. SSPOV must be cleared in software in either mode.
0 = No overflow
SSPEN: Synchronous Serial Port Enable bit
In SPI mode
1 = Enables serial port and configures SCK, SDO, and SDI as serial port pins
0 = Disables serial port and configures these pins as I/O port pins
In I
1 = Enables the serial port and configures the SDA and SCL pins as serial port pins
0 = Disables serial port and configures these pins as I/O port pins
In both modes, when enabled, these pins must be properly configured as input or output.
CKP: Clock Polarity Select bit
In SPI mode
1 = Idle state for clock is a high level. Transmit happens on falling edge, receive on rising edge.
0 = Idle state for clock is a low level. Transmit happens on rising edge, receive on falling edge.
In I
SCK release control
1 = Enable clock
0 = Holds clock low (clock stretch) (Used to ensure data setup time)
0000 = SPI master mode, clock = Fosc/4
0001 = SPI master mode, clock = Fosc/16
0010 = SPI master mode, clock = Fosc/64
0011 = SPI master mode, clock = TMR2 output/2
0100 = SPI slave mode, clock = SCK pin. SS pin control enabled.
0101 = SPI slave mode, clock = SCK pin. SS pin control disabled. SS can be used as I/O pin.
0110 = I
0111 = I
1011 = I
1110 = I
1111 = I
SSPOV
R/W-0
2
2
2
C mode
C mode
C mode
2
2
2
2
2
C slave mode, 7-bit address
C slave mode, 10-bit address
C firmware controlled Master Mode (slave idle)
C slave mode, 7-bit address with start and stop bit interrupts enabled
C slave mode, 10-bit address with start and stop bit interrupts enabled
SSPEN
R/W-0
Applicable Devices
61 62 62A R62 63 R63 64 64A R64 65 65A R65 66 67
R/W-0
CKP
SSPM3
R/W-0
SSPM2
R/W-0
SSPM1
R/W-0
SSPM0
R/W-0
bit0
W = Writable bit
U = Unimplemented bit,
- n =Value at POR reset
R = Readable bit
read as ‘0’
PIC16C6X
DS30234D-page 85
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