PIC18F2682-I/PT MICROCHIP [Microchip Technology], PIC18F2682-I/PT Datasheet - Page 215
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PIC18F2682-I/PT
Manufacturer Part Number
PIC18F2682-I/PT
Description
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F2682-IPT.pdf
(484 pages)
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17.4.7
In I
reload value is placed in the lower 7 bits of the
SSPADD register (Figure 17-17). When a write occurs
to SSPBUF, the Baud Rate Generator will automatically
begin counting. The BRG counts down to 0 and stops
until another reload has taken place. The BRG count is
decremented twice per instruction cycle (T
Q2 and Q4 clocks. In I
reloaded automatically.
FIGURE 17-17:
TABLE 17-3:
© 2007 Microchip Technology Inc.
Note 1:
2
C Master mode, the Baud Rate Generator (BRG)
10 MHz
10 MHz
10 MHz
4 MHz
4 MHz
4 MHz
1 MHz
1 MHz
1 MHz
The I
100 kHz) in all details, but may be used with care where higher rates are required by the application.
BAUD RATE
F
CY
2
C™ interface does not conform to the 400 kHz I
I
2
C™ CLOCK RATE w/BRG
BAUD RATE GENERATOR BLOCK DIAGRAM
SSPM3:SSPM0
2
C Master mode, the BRG is
SCL
SSPM3:SSPM0
20 MHz
20 MHz
20 MHz
8 MHz
8 MHz
8 MHz
2 MHz
2 MHz
2 MHz
F
CY
CY
PIC18F2682/2685/4682/4685
*2
) on the
Reload
Control
Preliminary
CLKO
Reload
Once the given operation is complete (i.e., transmis-
sion of the last data bit is followed by ACK), the internal
clock will automatically stop counting and the SCL pin
will remain in its last state.
Table 17-3 demonstrates clock rates based on
instruction cycles and the BRG value loaded into
SSPADD.
BRG Down Counter
2
SSPADD<6:0>
C specification (which applies to rates greater than
BRG Value
0Dh
0Ah
0Ah
19h
20h
64h
28h
03h
00h
F
OSC
(2 Rollovers of BRG)
/4
400 kHz
400 kHz
333 kHz
312.5 kHz
1 MHz
100 kHz
308 kHz
100 kHz
100 kHz
DS39761B-page 213
F
SCL
(1)
(1)
(1)
(1)
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