PIC18F4580T-I/PT Microchip Technology, PIC18F4580T-I/PT Datasheet - Page 217

• Manufacturer Part Number: PIC18F4580T-I/PT
• Description: IC PIC MCU FLASH 16KX16 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4580T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

18.4.7
In I
reload value is placed in the lower 7 bits of the
SSPADD register (Figure 18-17). When a write occurs
to SSPBUF, the Baud Rate Generator will automatically
begin counting. The BRG counts down 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 18-17:
TABLE 18-3:
© 2009 Microchip Technology Inc.
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
BAUD RATE
F
CY
I
2
C™ CLOCK RATE W/BRG
BAUD RATE GENERATOR BLOCK DIAGRAM
2
C Master mode, the BRG is
SSPM<3:0>
SCL
20 MHz
20 MHz
20 MHz
8 MHz
8 MHz
8 MHz
2 MHz
2 MHz
F
CY
SSPM<3:0>
CY
*2
PIC18F2480/2580/4480/4580
) on the
Reload
Control
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 18-3 demonstrates clock rates based on
instruction cycles and the BRG value loaded into
SSPADD.
BRG Down Counter
SSPADD<6:0>
BRG Value
0Dh
0Ah
0Ah
19h
20h
64h
28h
03h
F
OSC
(2 Rollovers of BRG)
/4
312.5 kHz
DS39637D-page 217
400 kHz
100 kHz
400 kHz
308 kHz
100 kHz
333 kHz
100 kHz
F
SCL