參數(shù)資料
型號: PIC16LF871-I/P
廠商: Microchip Technology
文件頁數(shù): 121/143頁
文件大?。?/td> 0K
描述: IC PIC MCU FLASH 2KX14 40DIP
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝: 10
系列: PIC® 16F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
連通性: UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 33
程序存儲(chǔ)器容量: 3.5KB(2K x 14)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 64 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
產(chǎn)品目錄頁面: 639 (CN2011-ZH PDF)
2003 Microchip Technology Inc.
DS30569B-page 77
PIC16F870/871
9.4.2
USART SYNCHRONOUS SLAVE
RECEPTION
The operation of the Synchronous Master and Slave
modes is identical, except in the case of the SLEEP
mode. Bit SREN is a “don't care” in Slave mode.
If receive is enabled by setting bit CREN prior to the
SLEEP
instruction, then a word may be received during
SLEEP. On completely receiving the word, the RSR
register will transfer the data to the RCREG register
and if enable bit RCIE bit is set, the interrupt generated
will wake the chip from SLEEP. If the global interrupt is
enabled, the program will branch to the interrupt vector
(0004h).
When setting up a Synchronous Slave Reception,
follow these steps:
1.
Enable the synchronous master serial port by
setting bits SYNC and SPEN and clearing bit
CSRC.
2.
If interrupts are desired, set enable bit RCIE.
3.
If 9-bit reception is desired, set bit RX9.
4.
To enable reception, set enable bit CREN.
5.
Flag bit RCIF will be set when reception is com-
plete and an interrupt will be generated, if
enable bit RCIE was set.
6.
Read the RCSTA register to get the ninth bit (if
enabled) and determine if any error occurred
during reception.
7.
Read the 8-bit received data by reading the
RCREG register.
8.
If any error occurred, clear the error by clearing
bit CREN.
9.
If using interrupts, ensure that GIE and PEIE
(bits 7 and 6) of the INTCON register are set.
TABLE 9-11:
REGISTERS ASSOCIATED WITH SYNCHRONOUS SLAVE RECEPTION
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on:
POR, BOR
Value on
all other
RESETS
0Bh, 8Bh,
10Bh,18Bh
INTCON
GIE
PEIE
T0IE
INTE
RBIE
T0IF
INTF
R0IF
0000 000x
0000 000u
0Ch
PIR1
PSPIF(1)
ADIF
RCIF
TXIF
CCP1IF
TMR2IF
TMR1IF
0000 -000
18h
RCSTA
SPEN
RX9
SREN
CREN
ADDEN
FERR
OERR
RX9D
0000 000x
1Ah
RCREG
USART Receive Register
0000 0000
8Ch
PIE1
PSPIE(1)
ADIE
RCIE
TXIE
CCP1IE
TMR2IE
TMR1IE 0000 -000
0000 -000
98h
TXSTA
CSRC
TX9
TXEN
SYNC
BRGH
TRMT
TX9D
0000 -010
99h
SPBRG
Baud Rate Generator Register
0000 0000
Legend:
x
= unknown, - = unimplemented, read as '0'. Shaded cells are not used for synchronous slave reception.
Note
1:
Bits PSPIE and PSPIF are reserved on the PIC16F870, always maintain these bits clear.
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