PIC18F8520-I/PT Microchip Technology Inc., PIC18F8520-I/PT Datasheet - Page 185

• Manufacturer Part Number: PIC18F8520-I/PT
• Description: 80 PIN, 32 KB FLASH, 2048 RAM, 68 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F8520-I/PT

• A/d Inputs: 16-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 1024 Bytes
• Input Output: 68
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 80-pin TQFP
• Programmable Memory: 32K Bytes
• Ram Size: 2K Bytes
• Speed: 40 MHz
• Timers: 2-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part

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:
 2004 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 GENERATOR
F
CY
2
PIC18F6520/8520/6620/8620/6720/8720
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
*2
) on the
Control
Reload
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 15-3 demonstrates clock rates based on
instruction cycles and the BRG value loaded into
SSPADD.
2
BRG Down Counter
C specification (which applies to rates greater than
SSPADD<6:0>
BRG VALUE
0Dh
3Fh
0Ah
0Ah
19h
20h
28h
03h
00h
F
OSC
(2 rollovers of BRG)
/4
400 kHz
400 kHz
333 kHz
312.5 kHz
1 MHz
DS39609B-page 183
100 kHz
308 kHz
100 kHz
100 kHz
F
SCL
(1)
(1)
(1)
(1)