PIC16LF1526-I/PT Microchip Technology, PIC16LF1526-I/PT Datasheet - Page 257
![MCU PIC 14KB FLASH 64TQFP](/photos/16/3/160367/tqfp-64_sml.jpg)
PIC16LF1526-I/PT
Manufacturer Part Number
PIC16LF1526-I/PT
Description
MCU PIC 14KB FLASH 64TQFP
Manufacturer
Microchip Technology
Series
PIC® XLP™ 16Fr
Datasheet
1.PIC16LF1526T-IPT.pdf
(354 pages)
Specifications of PIC16LF1526-I/PT
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
54
Program Memory Size
14KB (8K x 14)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 30x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP
Processor Series
PIC16F
Core
PIC
Data Ram Size
768 B
Interface Type
MI2C, SPI, EUSART
Number Of Timers
9
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Development Tools By Supplier
MPLAB IDE Software
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16LF1526-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
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22.1
The EUSART transmits and receives data using the
standard non-return-to-zero (NRZ) format. NRZ is
implemented with two levels: a V
represents a ‘ 1 ’ data bit, and a V
represents a ‘ 0 ’ data bit. NRZ refers to the fact that
consecutively transmitted data bits of the same value
stay at the output level of that bit without returning to a
neutral level between each bit transmission. An NRZ
transmission port idles in the mark state. Each character
transmission consists of one Start bit followed by eight
or nine data bits and is always terminated by one or
more Stop bits. The Start bit is always a space and the
Stop bits are always marks. The most common data
format is 8 bits. Each transmitted bit persists for a period
of 1/(Baud Rate). An on-chip dedicated 8-bit/16-bit Baud
Rate Generator is used to derive standard baud rate
frequencies from the system oscillator. See
for examples of baud rate configurations.
The EUSART transmits and receives the LSb first. The
EUSART’s transmitter and receiver are functionally
independent, but share the same data format and baud
rate. Parity is not supported by the hardware, but can
be implemented in software and stored as the ninth
data bit.
22.1.1
The EUSART transmitter block diagram is shown in
Figure
Transmit Shift Register (TSR), which is not directly
accessible by software. The TSR obtains its data from
the transmit buffer, which is the TXxREG register.
22.1.1.1
The EUSART transmitter is enabled for asynchronous
operations by configuring the following three control
bits:
• TXEN = 1
• SYNC = 0
• SPEN = 1
All other EUSART control bits are assumed to be in
their default state.
Setting the TXEN bit of the TXxSTA register enables the
transmitter circuitry of the EUSART. Clearing the SYNC
bit of the TXxSTA register configures the EUSART for
asynchronous operation. Setting the SPEN bit of the
RCxSTA register enables the EUSART. The program-
mer must set the corresponding TRIS bit to configure the
TXx/CKx I/O pin as an output. If the TXx/CKx pin is
shared with an analog peripheral, the analog I/O function
must be disabled by clearing the corresponding ANSEL
bit.
2011 Microchip Technology Inc.
Note:
22-1. The heart of the transmitter is the serial
EUSART Asynchronous Mode
EUSART ASYNCHRONOUS
TRANSMITTER
The TXxIF transmitter interrupt flag is set
when the TXEN enable bit is set.
Enabling the Transmitter
OL
OH
space state which
mark state which
Table 22-5
Preliminary
22.1.1.2
A transmission is initiated by writing a character to the
TXxREG register. If this is the first character, or the
previous character has been completely flushed from
the TSR, the data in the TXxREG is immediately
transferred to the TSR register. If the TSR still contains
all or part of a previous character, the new character
data is held in the TXxREG until the Stop bit of the
previous character has been transmitted. The pending
character in the TXxREG is then transferred to the TSR
in one T
transmission. The transmission of the Start bit, data bits
and Stop bit sequence commences immediately
following the transfer of the data to the TSR from the
TXxREG.
22.1.1.3
The polarity of the transmit data can be controlled with
the CKTXP bit of the BAUDxCON register. The default
state of this bit is ‘ 0 ’ which selects high true transmit
idle and data bits. Setting the CKTXP bit to ‘ 1 ’ will invert
the transmit data resulting in low true idle and data bits.
The CKTXP bit controls transmit data polarity only in
Asynchronous mode. In Synchronous mode the
CKTXP bit has a different function.
22.1.1.4
The TXxIF interrupt flag bit of the PIR1/PIR4 register is
set whenever the EUSART transmitter is enabled and
no character is being held for transmission in the
TXxREG. In other words, the TXxIF bit is only clear
when the TSR is busy with a character and a new
character has been queued for transmission in the
TXxREG. The TXxIF flag bit is not cleared immediately
upon writing TXxREG. TXxIF becomes valid in the
second instruction cycle following the write execution.
Polling TXxIF immediately following the TXxREG write
will return invalid results. The TXxIF bit is read-only, it
cannot be set or cleared by software.
The TXxIF interrupt can be enabled by setting the
TXxIE interrupt enable bit of the PIE1/PIE4 register.
However, the TXxIF flag bit will be set whenever the
TXxREG is empty, regardless of the state of TXxIE
enable bit.
To use interrupts when transmitting data, set the TXxIE
bit only when there is more data to send. Clear the
TXxIE interrupt enable bit upon writing the last
character of the transmission to the TXxREG.
PIC16(L)F1526/27
CY
Transmitting Data
Transmit Data Polarity
Transmit Interrupt Flag
immediately following the Stop bit
DS41458A-page 257
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