- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361591 > uPSD3234AV-40T6T (意法半導(dǎo)體) Flash Programmable System Devices with 8032 Microcontroller Core PDF資料下載
參數(shù)資料
| 型號(hào)： | uPSD3234AV-40T6T |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Flash Programmable System Devices with 8032 Microcontroller Core |
| 中文描述： | 閃存可編程系統(tǒng)設(shè)備與8032微控制器內(nèi)核 |
| 文件頁(yè)數(shù)： | 60/170頁(yè) |
| 文件大?。?/td> | 2717K |
| 代理商： | UPSD3234AV-40T6T |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)當(dāng)前第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)第151頁(yè)第152頁(yè)第153頁(yè)第154頁(yè)第155頁(yè)第156頁(yè)第157頁(yè)第158頁(yè)第159頁(yè)第160頁(yè)第161頁(yè)第162頁(yè)第163頁(yè)第164頁(yè)第165頁(yè)第166頁(yè)第167頁(yè)第168頁(yè)第169頁(yè)第170頁(yè)
uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV
60/170
More About Modes 2 and 3.
Eleven
transmitted (through TxD), or received (through
RxD): a Start Bit (0), 8 data bits (LSB first), a pro-
grammable 9th data bit, and a Stop Bit (1). On
transmit, the 9th data bit (TB8) can be assigned
the value of '0' or '1.' On receive, the data bit goes
into RB8 in SCON. The baud rate is programma-
ble to either 1/16 or 1/32 the CPU clock frequency
in Mode 2. Mode 3 may have a variable baud rate
generated from Timer 1.
Figure 31., page 63
and
Figure 33., page 64
show
a functional diagram of the serial port in Modes 2
and 3. The receive portion is exactly the same as
in Mode 1. The transmit portion differs from Mode
1 only in the 9th bit of the transmit shift register.
Transmission is initiated by any instruction that
uses SBUF as a destination register. The “WRITE
to SBUF” signal also loads TB8 into the 9th bit po-
sition of the transmit shift register and flags the TX
Control unit that a transmission is requested.
Transmission commences at S1P1 of the machine
cycle following the next roll-over in the divide-by-
16 counter. (Thus, the bit times are synchronized
to the divide-by-16 counter, not to the “WRITE to
SBUF” signal.)
The transmission begins with activation of SEND,
which puts the start bit at TxD. One bit time later,
DATA is activated, which enables the output bit of
the transmit shift register to TxD. The first shift
pulse occurs one bit time after that. The first shift
clocks a '1' (the Stop Bit) into the 9th bit position of
the shift register. There-after, only zeros are
clocked in. Thus, as data bits shift out to the right,
zeros are clocked in from the left. When TB8 is at
the out-put position of the shift register, then the
Stop Bit is just to the left of TB8, and all positions
to the left of that contain zeros. This condition flags
the TX Control unit to do one last shift and then de-
bits
are
activate SEND and set TI. This occurs at the 11th
divide-by 16 rollover after “WRITE to SUBF.”
Reception is initiated by a detected 1-to-0 transi-
tion at RxD. For this purpose RxD is sampled at a
rate of 16 times whatever baud rate has been es-
tablished. When a transition is detected, the di-
vide-by-16 counter is immediately reset, and 1FFH
is written to the input shift register.
At the 7th, 8th, and 9th counter states of each bit
time, the bit detector samples the value of R-D.
The value accepted is the value that was seen in
at least 2 of the 3 samples. If the value accepted
during the first bit time is not '0,' the receive circuits
are reset and the unit goes back to looking for an-
other 1-to-0 transition. If the Start Bit proves valid,
it is shifted into the input shift register, and recep-
tion of the rest of the frame will proceed.
As data bits come in from the right, '1s' shift out to
the left. When the Start Bit arrives at the left-most
position in the shift register (which in Modes 2 and
3 is a 9-bit register), it flags the RX Control block
to do one last shift, load SBUF and RB8, and set
RI.
The signal to load SBUF and RB8, and to set RI,
will be generated if, and only if, the following con-
ditions are met at the time the final shift pulse is
generated:
1.
RI = 0, and
2.
Either SM2 = 0, or the received 9th data bit = 1
If either of these conditions is not met, the received
frame is irretrievably lost, and RI is not set. If both
conditions are met, the received 9th data bit goes
into RB8, and the first 8 data bits go into SBUF.
One bit time later, whether the above conditions
were met or not, the unit goes back to looking for
a 1-to-0 transition at the RxD input.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPSD3233BV | Flash Programmable System Devices with 8032 Microcontroller Core |
| uPSD3233BV-40T6T | Flash Programmable System Devices with 8032 Microcontroller Core |
| uPSD3233BV-40U1T | Flash Programmable System Devices with 8032 Microcontroller Core |
| uPSD3233BV-40U6T | Flash Programmable System Devices with 8032 Microcontroller Core |
| uPSD3234A-24T1T | Flash Programmable System Devices with 8032 Microcontroller Core |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPSD3234AV-40U1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
| UPSD3234AV-40U1T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core and 64Kbit SRAM |
| UPSD3234AV-40U6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
| UPSD3234AV-40U6T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core and 64Kbit SRAM |
| UPSD3234B-24T1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。