PIC16F747 Microchip Technology Inc., PIC16F747 Datasheet - Page 115

• Manufacturer Part Number: PIC16F747
• Description: 28/40/44-pin, 8-bit Cmos Flash Microcontrollers With 10-bit A/d And Nanowatt Technology
• Manufacturer: Microchip Technology Inc.

10.4.4.5
When the CKP bit is cleared, the SCL output is forced
to ‘0’; however, setting the CKP bit will not assert the
SCL output low until the SCL output is already
sampled low. Therefore, the CKP bit will not assert the
SCL line until an external I
already asserted the SCL line. The SCL output will
remain low until the CKP bit is set and all other
devices on the I
ensures that a write to the CKP bit will not violate the
minimum high time requirement for SCL (see
Figure 10-12).
FIGURE 10-12:
 2004 Microchip Technology Inc.
SDA
SCL
CKP
Write
SSPCON
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Clock Synchronization
and the CKP Bit
2
C bus have deasserted SCL. This
CLOCK SYNCHRONIZATION TIMING
2
C master device has
Master device
asserts clock
DX
Master device
deasserts clock
PIC16F7X7
DS30498C-page 113
DX – 1