參數(shù)資料
型號(hào)： W78ERD2A40DL
廠商： WINBOND ELECTRONICS CORP
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-BIT MICROCONTROLLER
中文描述： 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PDIP40
封裝： ROHS COMPLIANT, DIP-40
文件頁(yè)數(shù)： 38/76頁(yè)
文件大?。?/td> 650K
代理商： W78ERD2A40DL
W78ERD2/W78ERD2A
- 38 -
10. ENHANCED FULL DUPLEX SERIAL PORT
The W78ERD2 serial port is a full-duplex port, and the W78ERD2 provides additional features such as
frame-error detection and automatic address recognition. The serial port runs in one of four operating
modes.
Serial Ports Modes
SM1
SM0
MODE
TYPE
BAUD CLOCK
FRAME
SIZE
START
BIT
STOP
BIT
9TH BIT
FUNCTION
0
0
0
Synch.
12 TCLKS
8 bits
No
No
None
0
1
1
Asynch.
Timer 1 or 2
10 bits
1
1
None
1
0
2
Asynch.
32 or 64 TCLKS
11 bits
1
1
0, 1
1
1
3
Asynch.
Timer 1 or 2
11 bits
1
1
0, 1
In synchronous mode (mode 0), the W78ERD2 generates the clock and operates in a half-duplex
mode. In asynchronous modes (modes 1 – 3), full-duplex operation is available so that the serial port
can simultaneously transmit and receive data. In any mode, register SBUF functions as both the
transmit register and the receive buffer. Any write to SBUF writes to the transmit register, while any
read from SBUF reads from the receive buffer. The rest of this section discusses each operating mode
and then discusses frame-error detection and automatic address recognition.
10.1 MODE 0
Mode 0 is a half-duplex, synchronous mode. RxD transmits and receives serial data, and TxD
transmits the shift clock. The TxD clock is provided by the W78ERD2. Eight bits are transmitted or
received per frame, LSB first. The baud rate is fixed at 1/12 of the oscillator frequency. The functional
block diagram is shown below.
SBUF
Transmit Shift Register
Receive Shift Register
TX
SHIFT
PAROUT
Internal
Data Bus
Internal
Data Bus
RXD
P3.0 Alternate
Output Function
TXD
P3.1 Alternate
Output function
RXD
P3.0 Alternate
Iutput function
Serial Port Interrupt
Write to
SBUF
TX
START
SOUT
TI
RI
REN
PARIN
LOAD
CLOCK
Read SBUF
SBUF
TX CLOCK
RI
SERIAL
CONTROLLE
SHIFT
CLOCK
RX
CLOCK
LOAD SBUF
RX
START
RX SHIFT
CLOCK
SIN
12
osc
Figure 10-1 Serial Port Mode 0
相關(guān)PDF資料
PDF描述
W78ERD2A40FL 8-BIT MICROCONTROLLER
W78ERD2A40PL 8-BIT MICROCONTROLLER
W78ERD2 8-BIT MICROCONTROLLER
W78ERD2A40DN 8-BIT MICROCONTROLLER
W78ERD2A40FN 8-BIT MICROCONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W78ERD2A40DN 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
W78ERD2A40FL 功能描述:IC MCU 8-BIT 64K FLASH 44-PQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:W78 標(biāo)準(zhǔn)包裝:300 系列:78K0R/Ix3 核心處理器:78K/0R 芯體尺寸:16-位 速度:40MHz 連通性:3 線 SIO，I²C，LIN，UART/USART 外圍設(shè)備:DMA，LVD，POR，PWM，WDT 輸入/輸出數(shù):27 程序存儲(chǔ)器容量:16KB（16K x 8） 程序存儲(chǔ)器類(lèi)型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:38-SSOP 包裝:托盤(pán)
W78ERD2A40FN 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
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W78ERD2A40PN 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER
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