參數(shù)資料
型號(hào): PIC24FJ64GA008T-I/PT
廠商: Microchip Technology
文件頁(yè)數(shù): 54/258頁(yè)
文件大?。?/td> 0K
描述: IC PIC MCU FLASH 64KB 80TQFP
標(biāo)準(zhǔn)包裝: 1,200
系列: PIC® 24F
核心處理器: PIC
芯體尺寸: 16-位
速度: 16MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 69
程序存儲(chǔ)器容量: 64KB(22K x 24)
程序存儲(chǔ)器類(lèi)型: 閃存
RAM 容量: 8K x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 16x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 80-TQFP
包裝: 帶卷 (TR)
配用: DM240011-ND - KIT STARTER MPLAB FOR PIC24F MCU
DV164033-ND - KIT START EXPLORER 16 MPLAB ICD2
MA160011-ND - DAUGHTER BOARD PICDEM LCD 16F91X
DM240001-ND - BOARD DEMO PIC24/DSPIC33/PIC32
AC164328-ND - MODULE SKT FOR 80TQFP
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2005-2012 Microchip Technology Inc.
DS39747F-page 147
PIC24FJ128GA010 FAMILY
17.2
Transmitting in 8-Bit Data Mode
1.
Set up the UARTx:
a)
Write appropriate values for data, parity and
Stop bits.
b)
Write appropriate baud rate value to the
UBRGx register.
c)
Set up transmit and receive interrupt enable
and priority bits.
2.
Enable the UARTx.
3.
Set the UTXEN bit (causes a transmit interrupt).
4.
Write data byte to lower byte of UTXxREG word.
The value will be immediately transferred to the
Transmit Shift Register (TSR) and the serial bit
stream will start shifting out with the next rising
edge of the baud clock.
5.
Alternately, the data byte may be transferred
while UTXEN = 0 and then the user may set
UTXEN. This will cause the serial bit stream to
begin immediately because the baud clock will
start from a cleared state.
6.
A transmit interrupt will be generated as per
interrupt control bit, UTXISELx.
17.3
Transmitting in 9-Bit Data Mode
1.
Set up the UARTx (as described in Section 17.2
2.
Enable the UARTx.
3.
Set the UTXEN bit (causes a transmit interrupt).
4.
Write UxTXREG as a 16-bit value only.
5.
A word write to UxTXREG triggers the transfer
of the 9-bit data to the TSR. Serial bit stream will
start shifting out with the first rising edge of the
baud clock.
6.
A transmit interrupt will be generated as per the
setting of control bit, UTXISELx.
17.4
Break and Sync Transmit
Sequence
The following sequence will send a message frame
header, made up of a Break, followed by an auto-baud
Sync byte.
1.
Configure the UARTx for the desired mode.
2.
Set UTXEN and UTXBRK – sets up the Break
character,
3.
Load the UxTXREG with a dummy character to
initiate transmission (value is ignored).
4.
Write ‘55h’ to UxTXREG – loads the Sync
character into the transmit FIFO.
5.
After the Break has been sent, the UTXBRK bit
is reset by hardware. The Sync character now
transmits.
17.5
Receiving in 8-Bit or 9-Bit Data
Mode
1.
Set up the UARTx (as described in Section 17.2
2.
Enable the UARTx.
3.
A receive interrupt will be generated when one
or more data characters have been received, as
per interrupt control bit, URXISELx.
4.
Read the OERR bit to determine if an overrun
error has occurred. The OERR bit must be reset
in software.
5.
Read UxRXREG.
The act of reading the UxRXREG character will move
the next character to the top of the receive FIFO,
including a new set of PERR and FERR values.
17.6
Operation of UxCTS and UxRTS
Control Pins
UARTx Clear-to-Send (UxCTS) and Request-to-Send
(UxRTS) are the two hardware controlled pins that are
associated with the UARTx modules. These two pins
allow the UARTx to operate in Simplex and Flow Con-
trol mode. They are implemented to control the
transmission and reception between the Data Terminal
Equipment (DTE). The UEN<1:0> bits in the UxMODE
register configure these pins.
17.7
Infrared Support
The UARTx module provides two types of infrared
UARTx support: one is the IrDA clock output to support
the external IrDA encoder and decoder device (legacy
module support), and the other is the full implementation
of the IrDA encoder and decoder.
17.8
External IrDA Support – IrDA
Clock Output
To support the external IrDA encoder and decoder
devices, the BCLKx pin (same as the UxRTS pin) can
be configured to generate the 16x baud clock. With
UEN<1:0> = 11, the BCLKx pin will output the
16x baud clock if the UARTx module is enabled. It can
be used to support the IrDA codec chip.
17.9
Built-in IrDA Encoder and Decoder
The UARTx has full implementation of the IrDA
encoder and decoder as part of the UARTx module.
The built-in IrDA encoder and decoder functionality is
enabled using the IREN bit UxMODE<12>. When
enabled (IREN = 1), the receive pin (UxRX) acts as the
input from the infrared receiver. The transmit pin
(UxTX) acts as the output to the infrared transmitter.
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