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參數(shù)資料
| 型號(hào)： | ST16C2552IJ |
| 廠商： | EXAR CORP |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 2.97V TO 5.5V DUAL UART WITH 16-BYTE FIFO |
| 中文描述： | 2 CHANNEL(S), 4M bps, SERIAL COMM CONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁(yè)數(shù)： | 8/28頁(yè) |
| 文件大?。?/td> | 121K |
| 代理商： | ST16C2552IJ |
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3-142
ST16C2552
S
*RECEIVE TIME-OUT:
This mode is enabled when STARTECH UART is
operating in FIFO mode. Receive time out will not
occur if the receive FIFO is empty. The time out
counter will be reset at the center of each stop bit
received or each time receive holding register is read.
The actual time out value is T (
T
ime out length in
bits)= 4 X P (
P
rogrammed word length) + 12. To
convert time out value to a character value, user has
to divide this number to its complete word length +
parity ( if used) + number of stop bits and start bit.
Example -A: If user programs the word length = 7, and
no parity and one stop bit, Time out will be:
T = 4 X 7( programmed word length) +12 = 40 bits
Character time = 40 / 9 [ (programmed word length =
7) + (stop bit = 1) + (start bit = 1)] = 4.4 characters.
Example -B: If 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 bits
Character time = 40 / 10 [ (programmed word length
= 7) + (parity = 1) + (stop bit = 1) + (start bit = 1) = 4
characters.
ISR BIT-0:
0=an interrupt is pending and the ISR contents may be
used as a pointer to the appropriate interrupt service
routine.
1=no interrupt pending.
ISR BIT 1-3:
Logical combination of these bits, provides the high-
est priority interrupt pending.
ISR BIT 4-7:
These bits are not used and are set to zero if the FIFOs
are not enabled.
BIT 6-7:
are set to “1” when the FIFOs
are enabled.
FIFO CONTROL REGISTER (FCR)
This register is used to enable the FIFOs, clear the
FIFOs, set the receiver FIFO trigger level, and select
the type of DMA signaling.
FCR BIT-0:
0=Disable the transmit and receive FIFO.
1=Enable the transmit and receive FIFO.
IER BIT-1:
0=disable the transmitter empty interrupt.
1=enable the transmitter empty interrupt.
IER BIT-2:
0=disable the receiver line status interrupt.
1=enable the receiver line status interrupt.
IER BIT-3:
0=disable the modem status register interrupt.
1=enable the modem status register interrupt.
IER BIT 4-7:
All these bits are set to logic zero.
INTERRUPT STATUS REGISTER (ISR)
The ST16C2552 provides four level prioritized inter-
rupt conditions to minimize software overhead during
data character transfers. The Interrupt Status Regis-
ter (ISR) provides the source of the interrupt in priori-
tized matter. During the read cycle the ST16C2552
provides the highest interrupt level to be serviced by
CPU. No other interrupts are acknowledged until the
particular interrupt is serviced. The following are the
prioritized interrupt levels:
Priority level
P
D3
D2
D1
D0
Source of the interrupt
1
0
1
1
0
LSR (Receiver Line Sta-
tus Register)
RXRDY (Received Data
Ready)
RXRDY (Receive Data
time out)
TXRDY( Transmitter
Holding Register Empty)
MSR (Modem Status
Register)
2
0
1
0
0
2*
1
1
0
0
3
0
0
1
0
4
0
0
0
0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST16C452IJ68 | DUAL UART WITH PARALLEL PRINTER PORT |
| ST16C452IJ68PS | DUAL UART WITH PARALLEL PRINTER PORT |
| ST16C452CJ68 | Power Supply IC; Number of Outputs:1; Supply Voltage Max:5.5V; Package/Case:10-MSOP; Leaded Process Compatible:No; Output Current:150mA; Output Voltage Max:1.3V; Peak Reflow Compatible (260 C):No; Power Dissipation:481mW |
| ST16C452CJ68PS | Power Supply IC; Number of Outputs:1; Supply Voltage Max:5.5V; Package/Case:10-MSOP; Leaded Process Compatible:No; Output Current:150mA; Output Voltage Max:1.3V; Peak Reflow Compatible (260 C):No; Power Dissipation:481mW |
| ST16C452PS | Dual UART with Parallel Printer Port(雙通用異步接收器/發(fā)送器（帶并行打印機(jī)端口）) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST16C2552IJ44 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: 制造商:Exar Corporation 功能描述:UART, 44 Pin, Plastic, PLCC |
| ST16C2552IJ44-F | 功能描述:UART 接口集成電路 2.97V-5.5V 16B FIFO temp -45 to 85C;UART 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 |
| ST16C2552IJ44TR-F | 功能描述:UART 接口集成電路 DUAL 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 |
| ST16C2552IQ48 | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:UART |
| ST16C32245 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:14 BIT DUAL SUPPLY BUS TRANSCEIVER LEVEL TRANSLATOR, A SIDE SERIES RESISTOR, 2 BIT I2C LINES |
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