PIC17C756A-16I/L Microchip Technology, PIC17C756A-16I/L Datasheet - Page 120
![IC, 8BIT MCU, PIC17C, 33MHZ, PLCC-64](/photos/12/13/121323/c04-049_l_sml.jpg)
PIC17C756A-16I/L
Manufacturer Part Number
PIC17C756A-16I/L
Description
IC, 8BIT MCU, PIC17C, 33MHZ, PLCC-64
Manufacturer
Microchip Technology
Series
PIC® 17Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC17C752-16L.pdf
(304 pages)
3.PIC17C752-16L.pdf
(6 pages)
Specifications of PIC17C756A-16I/L
Controller Family/series
PIC17
No. Of I/o's
50
Ram Memory Size
902Byte
Cpu Speed
33MHz
No. Of Timers
4
Interface
I2C, SPI, USART
Core Size
8 Bit
Program Memory Size
32KB
Core Processor
PIC
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
50
Program Memory Type
OTP
Ram Size
902 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
68-PLCC
Embedded Interface Type
I2C, SPI, USART
Rohs Compliant
Yes
Processor Series
PIC17C
Core
PIC
Data Bus Width
8 bit
Data Ram Size
902 B
Interface Type
I2C, MSSP, RS- 232, SCI, SPI, USART
Maximum Clock Frequency
33 MHz
Number Of Programmable I/os
50
Number Of Timers
8
Operating Supply Voltage
3 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC164308 - MODULE SKT FOR PM3 68PLCCDVA17XL681 - DEVICE ADAPTER FOR PIC17C752DM173001 - KIT DEVELOPMENT PICDEM17AC174007 - MODULE SKT PROMATEII 68PLCCAC164024 - ADAPTER PICSTART PLUS 68PLCC
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC17C756A-16I/L
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
PIC17C756A-16I/L
Manufacturer:
MICROCH
Quantity:
20 000
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- Download datasheet (6Mb)
PIC17C7XX
14.1
The BRG supports both the Asynchronous and Syn-
chronous modes of the USART. It is a dedicated 8-bit
baud rate generator. The SPBRG register controls the
period of a free running 8-bit timer. Table 14-2 shows
the formula for computation of the baud rate for differ-
ent USART modes. These only apply when the USART
is in Synchronous Master mode (internal clock) and
Asynchronous mode.
Given the desired baud rate and Fosc, the nearest inte-
ger value between 0 and 255 can be calculated using
the formula below. The error in baud rate can then be
determined.
TABLE 14-2:
X = value in SPBRG (0 to 255)
Example 14-1 shows the calculation of the baud rate
error for the following conditions:
TABLE 14-3:
DS30289B-page 120
Legend:
SYNC
0
1
13h, Bank 0
15h, Bank 0
17h, Bank 0
13h, Bank 4
15h, Bank 4
17h, Bank 4
F
Desired Baud Rate = 9600
SYNC = 0
Address
OSC
USART Baud Rate Generator
(BRG)
x = unknown, u = unchanged, - = unimplemented, read as '0'. Shaded cells are not used by the Baud Rate Generator.
Asynchronous
Synchronous
= 16 MHz
Mode
RCSTA1
TXSTA1
SPBRG1
RCSTA2
TXSTA2
SPBRG2
BAUD RATE FORMULA
REGISTERS ASSOCIATED WITH BAUD RATE GENERATOR
Name
Baud Rate Generator Register
Baud Rate Generator Register
CSRC
CSRC
SPEN
SPEN
Bit 7
F
F
OSC
OSC
Baud Rate
Bit 6
RX9
TX9
RX9
TX9
/(64(X+1))
/(4(X+1))
SREN
TXEN
SREN
TXEN
Bit 5
CREN
SYNC
CREN
SYNC
Bit 4
Bit 3
—
—
—
—
EXAMPLE 14-1:
Writing a new value to the SPBRG, causes the BRG
timer to be reset (or cleared). This ensures that the
BRG does not wait for a timer overflow before output-
ting the new baud rate.
Effects of Reset
After any device RESET, the SPBRG register is
cleared. The SPBRG register will need to be loaded
with the desired value after each RESET.
Desired Baud Rate = F
Calculated Baud Rate = 16000000 / (64 (25 + 1))
FERR
FERR
Bit 2
9600 = 16000000 /(64 (X + 1))
X
Error = (Calculated Baud Rate - Desired Baud Rate)
—
—
= 25.042
= 9615
= (9615 - 9600) / 9600
= 0.16%
OERR
TRMT
OERR
TRMT
Bit 1
OSC
RX9D
TX9D
RX9D
TX9D
Bit 0
CALCULATING BAUD
RATE ERROR
25
/ (64 (X + 1))
2000 Microchip Technology Inc.
Desired Baud Rate
0000 -00x
0000 --1x
0000 0000
0000 -00x
0000 --1x
0000 0000
Value on
POR,
BOR
MCLR, WDT
0000 -00u
0000 --1u
0000 0000
0000 -00u
0000 --1u
0000 0000
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