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參數(shù)資料
| 型號： | 935270030157 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 1 CHANNEL(S), 3M bps, SERIAL COMM CONTROLLER, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-313-2, LQFP-48 |
| 文件頁數(shù)： | 18/53頁 |
| 文件大?。?/td> | 704K |
| 代理商： | 935270030157 |
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Philips Semiconductors
SC16C650A
Universal Asynchronous Receiver/Transmitter (UART)
with 32-byte FIFO and infrared (IrDA) encoder/decoder
Product data
Rev. 03 — 13 March 2003
25 of 49
9397 750 11207
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
5
MCR[5]
INT typ select.
Logic 0 = Enable active or 3-State interrupt output mode (normal
default condition).
Logic= 1 = Enable open source interrupt output mode. Provides
shared interrupts in the STD mode by producing a wire-OR output
driver capability for interrupts. This output appears at the IRQA/INT
pin. When using this option, an external pull-down resistor of
200 to 500
must be tied from the IRQA/INT pin to ground to
provide and acceptable logic 0 level
4
MCR[4]
Loop-back. Enable the local loop-back mode (diagnostics). In this
mode the transmitter output (TX) and the receiver input (RX), CTS,
DSR, DCD, and RI are disconnected from the SC16C650A I/O pins.
Internally the modem data and control pins are connected into a
loop-back data conguration (see Figure 7). In this mode, the receiver
and transmitter interrupts remain fully operational. The Modem
Control Interrupts are also operational, but the interrupts’ sources are
switched to the lower four bits of the Modem Control. Interrupts
continue to be controlled by the IER register.
Logic 0 = Disable loop-back mode (normal default condition).
Logic 1 = Enable local loop-back mode (diagnostics).
3
MCR[3]
OUT2, INTx enable. Used to control the modem DCD signal in the
loop-back mode.
Logic 0 = Forces INT output to the 3-State mode. In the loop-back
mode, sets OUT2 (DCD) internally to a logic 1.
Logic 1 = Forces the INT output to the active mode. In the
loop-back mode, sets OUT2 (DCD) internally to a logic 0.
2
MCR[2]
OUT1. This bit is used in the Loop-back mode only. In the loop-back
mode, this bit is used to write the state of the modem RI interface
signal via OUT1.
1
MCR[1]
RTS
Logic0=Force RTS output to a logic 1 (normal default condition).
Logic1=Force RTS output to a logic 0.
0
MCR[0]
DTR
Logic0=Force DTR output to a logic 1 (normal default condition).
Logic1=Force DTR output to a logic 0.
Table 19:
Modem Control Register bits description…continued
Bit
Symbol
Description
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