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參數(shù)資料
| 型號： | ST16C1551 |
| 廠商： | Exar Corporation |
| 英文描述： | UART with 16-Byte FIFO(通用異步接收器/發(fā)送器（帶16字節(jié)的先進(jìn)先出）) |
| 中文描述： | 的UART具有16字節(jié)FIFO（通用異步接收器/發(fā)送器（帶16字節(jié)的先進(jìn)先出）） |
| 文件頁數(shù)： | 10/32頁 |
| 文件大小： | 418K |
| 代理商： | ST16C1551 |
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ST16C1550/51
10
Rev. 3.10
Crystal oscillator connection
C1
22pF
C2
33pF
X1
1.8432 MHz
R1
50-120
R2
1M
X
X
out length in bits) = 4 X P (
P
rogrammed word length)
+ 12. To convert the time out value to a character
value, the user has to consider the complete word
length, including data information length, start bit,
parity bit, and the size of stop bit, i.e., 1X, 1.5X, or 2X
bit times.
Example -A: If the user programs a word length of 7,
with no parity and one stop bit, the time out will be:
T = 4 X 7( programmed word length) +12 = 40 bit times.
The character time will be equal to 40 / 9 = 4.4
characters, or as shown in the fully worked out ex-
ample: T = [(programmed word length = 7) + (stop bit
= 1) + (start bit = 1) = 9]. 40 (bit times divided by 9) =
4.4 characters.
Example -B: If the user programs the word length = 7,
with parity and one stop bit, the time out will be:
T = 4 X 7(programmed word length) + 12 = 40 bit times.
Character time = 40 / 10 [ (programmed word length
= 7) + (parity = 1) + (stop bit = 1) + (start bit = 1) = 4
characters.
Programmable Baud Rate Generator
The 155X supports high speed modem technologies
that have increased input data rates by employing
data compression schemes. For example a 33.6Kbps
modem that employs data compression may require a
115.2Kbps input data rate. A 128.0Kbps ISDN modem
that supports data compression may need an input
data rate of 460.8Kbps.
A single baud rate generator is provided for both the
transmitter and receiver. The programmable Baud
Rate Generator is capable of accepting an input clock
up to 24 MHz, as required for supporting a 1.5Mbps
data rate. The 155X can be configured for internal
clock (XTAL) operation on all packages except the 28
pin ST16C1551. The 28 pin ST16C1551 requires an
external clock input and this device can not be config-
ured for internal (XTAL) operation. For internal (XTAL)
clock oscillator operation, an industry standard micro-
processor crystal (parallel resonant/ 22-33 pF load) is
connected externally between the XTAL1 and XTAL2
pins, with an external 1 M
resistor across it. Alterna-
tively, an external clock can be connected to the
XTAL1 pin to clock the internal baud rate generator for
standard or custom rates. (see Baud Rate Generator
Programming).
The generator divides the input 16X clock by any
divisor from 1 to 2
16
-1. The 155X divides the basic
external clock by 16. The basic 16X clock provides
data rates to support standard and custom applica-
tions using the same system design. The data rate is
configured via the DLL and DLM internal register
functions. Customized Baud Rates can be achieved
by selecting the proper divisor values for the MSB and
LSB sections of baud rate generator.
Programming the Baud Rate Generator Registers
DLM (MSB) and DLL (LSB) provides a user capability
for selecting the desired final baud rate. The example
in Table 4 below, shows the selectable baud rates
available when using a 1.8432 MHz external clock
input.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST16C2550CQ48 | DUAL UART WITH 16-BYTE TRANSMIT AND RECEIVE FIFO’S |
| ST16C2550IJ44 | DUAL UART WITH 16-BYTE TRANSMIT AND RECEIVE FIFO’S |
| ST16C2550IP40 | DUAL UART WITH 16-BYTE TRANSMIT AND RECEIVE FIFO’S |
| ST16C2550CJ44 | DUAL UART WITH 16-BYTE TRANSMIT AND RECEIVE FIFO’S |
| ST16C2550CP40 | Power Supply IC; Supply Voltage Max:6V; Output Voltage:1.3V; Package/Case:20-TSSOP; Leaded Process Compatible:No; Output Voltage Max:1.3V; Peak Reflow Compatible (260 C):No; Supply Voltage Min:2.7V; Mounting Type:Surface Mount |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST16C1551CJ28 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V UART WITH 16-BYTE FIFO |
| ST16C1551CJ28-F | 功能描述:UART 接口集成電路 UART W/16BYTE FIFO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| ST16C1551CP28 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V UART WITH 16-BYTE FIFO |
| ST16C1551CQ48 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V UART WITH 16-BYTE FIFO |
| ST16C1551CQ48-F | 功能描述:UART 接口集成電路 UART W/16BYTE FIFO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
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