- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67723 > IS89C51-12PL (INTEGRATED SILICON SOLUTION INC) 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQCC44 PDF資料下載
參數(shù)資料
| 型號： | IS89C51-12PL |
| 廠商： | INTEGRATED SILICON SOLUTION INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 15/48頁 |
| 文件大?。?/td> | 371K |
| 代理商： | IS89C51-12PL |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當(dāng)前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁
IS89C51
22
1-800-379-4774 — Integrated Silicon Solution, Inc.
MC016-1C
11/21/98
ISSI
Table 8. Serial Port Setup
Mode
SCON
SM2Variation
0
10H
1
50H
2
90H
3
D0H
0NA
1
70H
2
B0H
3
F0H
Single Processor
Environment
(SM2 = 0)
Multiprocessor
Environment
(SM2 = 1)
At the seventh, eighth, and ninth counter states of each bit
time, the bit detector samples the value of RXD. The value
accepted is the value that was seen in at least two of the
three samples. If the value accepted during the first bit time
is not 0, the receive circuits are reset and the unit continues
looking for another 1-to-0 transition. If the start bit proves
valid, it is shifted into the input shift register, and reception
of the rest of the frame proceeds.
As data bits come in from the right, 1s shift out to the left.
When the start bit arrives at the leftmost 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 is generated if, and only if, the following conditions
are met at the time the final shift pulse is generated:
1) RI = 0, and
2) Either SM2 = 0 or the received ninth 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 ninth data bit goes into RB8, and the first
eight data bits go into SBUF. One bit time later, whether the
above conditions were met or not, the unit continues
looking for a 1-to-0 transition at the RXD input.
Note that the value of the received stop bit is irrelevant to
SBUF, RB8, or RI.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IS89C51-40PQ | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP44 |
| IS89LV51-12PQ | 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP44 |
| IS89LV51-24WI | 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PDIP40 |
| IS89LV51-40W | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PDIP40 |
| IS89LV52-12W | 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PDIP40 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IS89C51-12PLI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| IS89C51-12PQ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| IS89C51-12PQI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| IS89C51-12W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| IS89C51-12WI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。