參數(shù)資料
型號: ST16C554DCJ68
廠商: EXAR CORP
元件分類: Serial IO/Communication Controller
英文描述: 4 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PQCC68
封裝: PLASTIC, LCC-68
文件頁數(shù): 14/41頁
文件大?。?/td> 582K
代理商: ST16C554DCJ68
ST16C554/554D
21
REV. 4.0.1
2.97V TO 5.5V QUAD UART WITH 16-BYTE FIFO
LCR[5]: TX and RX Parity Select
If the parity bit is enabled, LCR BIT-5 selects the forced parity format.
LCR BIT-5 = logic 0, parity is not forced (default).
LCR BIT-5 = logic 1 and LCR BIT-4 = logic 0, parity bit is forced to HIGH for the transmit and receive data.
LCR BIT-5 = logic 1 and LCR BIT-4 = logic 1, parity bit is forced to LOW for the transmit and receive data.
LCR[6]: Transmit Break Enable
When enabled, the Break control bit causes a break condition to be transmitted (the TX output is forced to a
“space’, logic 0, state). This condition remains, until disabled by setting LCR bit-6 to a logic 0.
Logic 0 = No TX break condition. (default)
Logic 1 = Forces the transmitter output (TX) to a “space”, logic 0, for alerting the remote receiver of a line
break condition.
LCR[7]: Baud Rate Divisors Enable
Baud rate generator divisor (DLL/DLM) enable.
Logic 0 = Data registers are selected (default).
Logic 1 = Divisor latch registers are selected.
4.7
Modem Control Register (MCR) or General Purpose Outputs Control - Read/Write
The MCR register is used for controlling the serial/modem interface signals or general purpose inputs/outputs.
MCR[0]: DTR# Output
The DTR# pin is a modem control output. If the modem interface is not used, this output may be used as a
general purpose output.
Logic 0 = Force DTR# output HIGH (default).
Logic 1 = Force DTR# output LOW.
MCR[1]: RTS# Output
The RTS# pin is a modem control output. If the modem interface is not used, this output may be used as a
general purpose output.
Logic 0 = Force RTS# output HIGH (default).
Logic 1 = Force RTS# output LOW.
MCR[2]: Reserved
OP1# is not available as an output pin on the 554. But it is available for use during Internal Loopback Mode. In
the Loopback Mode, this bit is used to write the state of the modem RI# interface signal.
TABLE 11: PARITY SELECTION
LCR BIT-5 LCR BIT-4 LCR BIT-3
PARITY SELECTION
X
0
No parity
0
1
Odd parity
0
1
Even parity
1
0
1
Force parity to mark, HIGH
1
Forced parity to space, LOW
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ST16C554DCJ-68 制造商:Exar Corporation 功能描述:IC,UART,LDCC,68PIN,PLASTIC
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