PIC16F946-E/PT Microchip Technology, PIC16F946-E/PT Datasheet - Page 137
![Microcontroller](/photos/6/81/68123/c04-066_pf_sml.jpg)
PIC16F946-E/PT
Manufacturer Part Number
PIC16F946-E/PT
Description
Microcontroller
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F913-ISS.pdf
(8 pages)
3.PIC16F913-ISS.pdf
(34 pages)
4.PIC16F946T-IPT.pdf
(274 pages)
Specifications of PIC16F946-E/PT
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
14KB (8K x 14)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
336 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
64-TFQFP
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
352 B
Interface Type
SSP, I2C, AUSART, SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
53
Number Of Timers
3
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, MA160011
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
MA160011 - DAUGHTER BOARD PICDEM LCD 16F91X
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F946-E/PT
Manufacturer:
MICROCHIP
Quantity:
12 000
Company:
Part Number:
PIC16F946-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16F913-ISS PDF datasheet #2
- PIC16F913-ISS PDF datasheet #3
- PIC16F946T-IPT PDF datasheet #4
- Current page: 137 of 274
- Download datasheet (5Mb)
11.1
The BRG supports both the Asynchronous and
Synchronous 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. In
Asynchronous mode, bit BRGH (TXSTA<2>) also
controls the baud rate. In Synchronous mode, bit
BRGH is ignored. Table 11-1 shows the formula for
computation of the baud rate for different USART
modes which only apply in Master mode (internal
clock).
Given the desired baud rate and F
integer value for the SPBRG register can be calculated
using the formula in Table 11-1. From this, the error in
baud rate can be determined.
TABLE 11-1:
TABLE 11-2:
© 2005 Microchip Technology Inc.
98h
18h
99h
Legend: x = unknown, – = unimplemented, read as ‘0’. Shaded cells are not used by the BRG.
Legend: X = value in SPBRG (0 to 255)
Address
SYNC
0
1
USART Baud Rate Generator
(BRG)
TXSTA
RCSTA
SPBRG Baud Rate Generator Register
Name
(Asynchronous) Baud Rate = F
(Synchronous) Baud Rate = F
BAUD RATE FORMULA
REGISTERS ASSOCIATED WITH BAUD RATE GENERATOR
CSRC
SPEN
Bit 7
BRGH = 0 (Low Speed)
Bit 6
RX9
TX9
OSC
SREN CREN ADDEN
TXEN SYNC
Bit 5
, the nearest
OSC
OSC
Bit 4
Preliminary
/(64 (X + 1))
/(4 (X + 1))
Bit 3
—
It may be advantageous to use the high baud rate
(BRGH = 1) even for slower baud clocks. This is
because the F
baud rate error in some cases.
Writing a new value to the SPBRG register causes the
BRG timer to be reset (or cleared). This ensures the
BRG does not wait for a timer overflow before
outputting the new baud rate.
11.1.1
The data on the RC7/RX/DT/SDI/SDA/SEG8 pin is
sampled three times by a majority detect circuit to
determine if a high or a low level is present at the RX
pin.
BRGH TRMT TX9D 0000 -010 0000 -010
FERR
Bit 2
OERR RX9D 0000 000x 0000 000x
SAMPLING
Bit 1
Baud Rate = F
OSC
BRGH = 1 (High Speed)
/(16 (X + 1)) equation can reduce the
Bit 0
PIC16F946
N/A
OSC
0000 0000 0000 0000
POR, BOR
Value on:
/(16 (X + 1))
DS41265A-page 135
Value on
all other
Resets
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