參數(shù)資料
型號： PIC16F628A
廠商： Microchip Technology Inc.
英文描述： 18-pin Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology(18引腳，基于FLASH的8位CMOS微控制器，使用毫微瓦特技術(shù))
中文描述： 18引腳基于閃存的8位CMOS微控制器與納瓦技術(shù)（18引腳，基于閃存的8位的CMOS微控制器，使用毫微瓦特技術(shù)）
文件頁數(shù)： 88/168頁
文件大?。?/td> 2756K
代理商： PIC16F628A
PIC16F627A/628A/648A
DS40044B-page 86
Preliminary
2004 Microchip Technology Inc.
FIGURE 12-14:
SYNCHRONOUS RECEPTION (MASTER MODE, SREN)
12.5
USART Synchronous Slave Mode
Synchronous Slave mode differs from the Master mode
in the fact that the shift clock is supplied externally at
the RB2/TX/CK pin (instead of being supplied internally
in Master mode). This allows the device to transfer or
receive data while in Sleep mode. Slave mode is
entered by clearing bit CSRC (TXSTA<7>).
12.5.1
USART SYNCHRONOUS SLAVE
TRANSMIT
The operation of the synchronous Master and Slave
modes are identical except in the case of the Sleep
mode.
If two words are written to the TXREG and then the
SLEEP
instruction is executed, the following will occur:
a)
The first word will immediately transfer to the
TSR register and transmit.
b)
The second word will remain in TXREG register.
c)
Flag bit TXIF will not be set.
d)
When the first word has been shifted out of TSR,
the TXREG register will transfer the second
word to the TSR and flag bit TXIF will now be
set.
e)
If enable bit TXIE is set, the interrupt will wake
the chip from Sleep and if the global interrupt is
enabled, the program will branch to the interrupt
vector (0004h).
Follow these steps when setting up a Synchronous
Slave Transmission:
1.
TRISB<1> bit needs to be set and TRISB<2> bit
cleared in order to configure pins RB2/TX/CK
and RB1/RX/DT as the Universal Synchronous
Asynchronous Receiver Transmitter pins.
2.
Enable the synchronous slave serial port by
setting bits SYNC and SPEN and clearing bit
CSRC.
3.
Clear bits CREN and SREN.
4.
If interrupts are desired, then set enable bit
TXIE.
5.
If 9-bit transmission is desired, then set bit TX9.
6.
Enable the transmission by setting enable bit
TXEN.
7.
If 9-bit transmission is selected, the ninth bit
should be loaded in bit TX9D.
8.
Start transmission by loading data to the TXREG
register.
CREN BIT
RB1/RX/DT PIN
RB2/TX/CK PIN
WRITE TO
BIT SREN
SREN BIT
RCIF BIT
(INTERRUPT)
READ
RXREG
Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4
Q2
Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4Q1Q2Q3Q4
‘0’
BIT0
BIT1
BIT2
BIT3
BIT4
BIT5
BIT6
BIT7
‘0’
Q1Q2Q3Q4
Note:
Timing diagram demonstrates Sync Master Mode with bit SREN = ‘1’ and bit BRG = ‘0’.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16F628A-E/ML 功能描述:8位微控制器 -MCU 3.5KB 224 RAM 16 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F628A-E/P 功能描述:8位微控制器 -MCU 3.5KB 224 RAM 16 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F628A-E/SO 功能描述:8位微控制器 -MCU 3.5KB 224 RAM 16 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F628A-E/SS 功能描述:8位微控制器 -MCU 3.5KB 224 RAM 16 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F628A-I/ML 功能描述:8位微控制器 -MCU 3.5KB 224 RAM 16 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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