PIC16C770 Microchip Technology Inc., PIC16C770 Datasheet - Page 68

• Manufacturer Part Number: PIC16C770
• Description: 18/20-pin, 8-bit Cmos Microcontrollers With 10/12-bit A/d
• Manufacturer: Microchip Technology Inc.

PIC16C717/770/771
REGISTER 9-1:
DS41120B-page 66
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
SYNC SERIAL PORT STATUS REGISTER (SSPSTAT: 94h)
bit 7
SMP: Sample bit
SPI Master Mode
1 = Input data sampled at end of data output time
0 = Input data sampled at middle of data output time
SPI Slave Mode
SMP must be cleared when SPI is used in Slave mode
In I
1= Slew rate control disabled for Standard Speed mode (100 kHz and 1 MHz)
0= Slew rate control enabled for High Speed mode (400 kHz)
CKE: SPI Clock Edge Select (Figure 9-3, Figure 9-5, and Figure 9-6)
CKP = 0
1 = Data transmitted on rising edge of SCK
0 = Data transmitted on falling edge of SCK
CKP = 1
1 = Data transmitted on falling edge of SCK
0 = Data transmitted on rising edge of SCK
D/A: Data/Address bit (I
1 = Indicates that the last byte received or transmitted was data
0 = Indicates that the last byte received or transmitted was address
P: STOP bit
(I
1 = Indicates that a STOP bit has been detected last (this bit is ’0’ on RESET)
0 = STOP bit was not detected last
S: START bit
(I
1 = Indicates that a START bit has been detected last (this bit is ’0’ on RESET)
0 = START bit was not detected last
R/W: Read/Write bit information (I
This bit holds the R/W bit information following the last address match. This bit is only valid from the
address match to the next START bit, STOP bit, or NACK bit.
In
1 = Read
0 = Write
In
1 = Transmit is in progress
0 = Transmit is not in progress.
ORing this bit with SEN, RSEN, PEN, RCEN, or AKEN will indicate if the MSSP is in IDLE mode
UA: Update Address (10-bit I
1 = Indicates that the user needs to update the address in the SSPADD register
0 = Address does not need to be updated
BF: Buffer Full Status bit
Receive (SPI and
1 = Receive complete, SSPBUF is full
0 = Receive not complete, SSPBUF is empty
Transmit (
1 = Data Transmit in progress (does not include the ACK and STOP bits), SSPBUF is full
0 = Data Transmit complete (does not include the ACK and STOP bits), SSPBUF is empty
Legend:
R = Readable bit
- n = Value at POR
2
2
C mode only. This bit is cleared when the MSSP module is disabled, SSPEN is cleared)
C mode only. This bit is cleared when the MSSP module is disabled, SSPEN is cleared)
I
I
R/W-0
2
2
2
SMP
C Master or Slave mode:
C
C
Slave mode:
Master mode:
I
2
C
mode only)
R/W-0
CKE
I
2
C
Advance Information
modes)
2
C mode only)
R-0
D/A
2
W = Writable bit
’1’ = Bit is set
C mode only)
2
C mode only)
R-0
P
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
R-0
S
R/W
R-0
2002 Microchip Technology Inc.
x = Bit is unknown
R-0
UA
R-0
BF
bit 0