參數(shù)資料
型號: PIC18F4520-I/ML
廠商: Microchip Technology
文件頁數(shù): 78/151頁
文件大?。?/td> 0K
描述: IC MCU FLASH 16KX16 44QFN
產(chǎn)品培訓模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標準包裝: 45
系列: PIC® 18F
核心處理器: PIC
芯體尺寸: 8-位
速度: 40MHz
連通性: I²C,SPI,UART/USART
外圍設備: 欠壓檢測/復位,HLVD,POR,PWM,WDT
輸入/輸出數(shù): 36
程序存儲器容量: 32KB(16K x 16)
程序存儲器類型: 閃存
EEPROM 大小: 256 x 8
RAM 容量: 1.5K x 8
電壓 - 電源 (Vcc/Vdd): 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 13x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-VQFN 裸露焊盤
包裝: 管件
產(chǎn)品目錄頁面: 643 (CN2011-ZH PDF)
配用: XLT44QFN2-ND - SOCKET TRAN ICE 44QFN/40DIP
AC164322-ND - MODULE SOCKET MPLAB PM3 28/44QFN
444-1001-ND - DEMO BOARD FOR PICMICRO MCU
2011-2012 Microchip Technology Inc.
Preliminary
DS41579C-page 345
PIC16(L)F1782/3
27.6
EUSART Operation During Sleep
The EUSART will remain active during Sleep only in the
Synchronous Slave mode. All other modes require the
system clock and therefore cannot generate the neces-
sary signals to run the Transmit or Receive Shift regis-
ters during Sleep.
Synchronous Slave mode uses an externally generated
clock to run the Transmit and Receive Shift registers.
27.6.1
SYNCHRONOUS RECEIVE DURING
SLEEP
To receive during Sleep, all the following conditions
must be met before entering Sleep mode:
RCSTA and TXSTA Control registers must be
configured for Synchronous Slave Reception (see
).
If interrupts are desired, set the RCIE bit of the
PIE1 register and the GIE and PEIE bits of the
INTCON register.
The RCIF interrupt flag must be cleared by read-
ing RCREG to unload any pending characters in
the receive buffer.
Upon entering Sleep mode, the device will be ready to
accept data and clocks on the RX/DT and TX/CK pins,
respectively. When the data word has been completely
clocked in by the external device, the RCIF interrupt
flag bit of the PIR1 register will be set. Thereby, waking
the processor from Sleep.
Upon waking from Sleep, the instruction following the
SLEEP instruction will be executed. If the Global Inter-
rupt Enable (GIE) bit of the INTCON register is also set,
then the Interrupt Service Routine at address 004h will
be called.
27.6.2
SYNCHRONOUS TRANSMIT
DURING SLEEP
To transmit during Sleep, all the following conditions
must be met before entering Sleep mode:
RCSTA and TXSTA Control registers must be
configured for Synchronous Slave Transmission
The TXIF interrupt flag must be cleared by writing
the output data to the TXREG, thereby filling the
TSR and transmit buffer.
If interrupts are desired, set the TXIE bit of the
PIE1 register and the PEIE bit of the INTCON reg-
ister.
Interrupt enable bits TXIE of the PIE1 register and
PEIE of the INTCON register must set.
Upon entering Sleep mode, the device will be ready to
accept clocks on TX/CK pin and transmit data on the
RX/DT pin. When the data word in the TSR has been
completely clocked out by the external device, the
pending byte in the TXREG will transfer to the TSR and
the TXIF flag will be set. Thereby, waking the processor
from Sleep. At this point, the TXREG is available to
accept another character for transmission, which will
clear the TXIF flag.
Upon waking from Sleep, the instruction following the
SLEEP instruction will be executed. If the Global
Interrupt Enable (GIE) bit is also set then the Interrupt
Service Routine at address 0004h will be called.
27.6.3
ALTERNATE PIN LOCATIONS
This module incorporates I/O pins that can be moved to
other locations with the use of the alternate pin function
register, APFCON. To determine which pins can be
moved and what their default locations are upon a
more information.
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