SC16C550IA44,512 NXP Semiconductors, SC16C550IA44,512 Datasheet - Page 27

• Manufacturer Part Number: SC16C550IA44,512
• Description: IC UART SOT187-2
• Manufacturer: NXP Semiconductors

Specifications of SC16C550IA44,512

• Features: Programmable
• Number Of Channels: 1, UART
• Fifo's: 16 Byte
• Voltage - Supply: 2.5V, 3.3V, 5V
• With Auto Flow Control: Yes
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935270058512; SC16C550IA44; SC16C550IA44

Philips Semiconductors
9397 750 11619
Product data
7.6 Modem Control Register (MCR)
This register controls the interface with the modem or a peripheral device.
Table 18:
Bit
7
6
5
4
3
2
1
0
Symbol
MCR[7]
MCR[6]
MCR[5]
MCR[4]
MCR[3]
MCR[2]
MCR[1]
MCR[0]
Modem Control Register bits description
Rev. 05 — 19 June 2003
Description
Reserved; set to ‘0’.
IR enable.
Reserved; set to ‘0’.
Use EFR[6,7] to enable Auto RTS, CTS flow control.
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 SC16C550 I/O pins.
Internally the modem data and control pins are connected into a
loop-back data configuration (see
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.
OUT2, INTx enable. Used to control the modem DCD signal in the
loop-back mode.
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.
RTS
DTR
Logic 0 = Enable the standard modem receive and transmit
input/output interface (normal default condition).
Logic 1 = Enable infrared IrDA receive and transmit inputs/outputs.
While in this mode, the TX/RX output/inputs are routed to the
infrared encoder/decoder. The data input and output levels will
conform to the IrDA infrared interface requirement. As such, while
in this mode, the infrared TX output will be a logic 0 during idle data
conditions.
Logic 0 = Disable loop-back mode (normal default condition).
Logic 1 = Enable local loop-back mode (diagnostics).
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.
Logic 0 = Force RTS output to a logic 1 (normal default condition).
Logic 1 = Force RTS output to a logic 0.
Logic 0 = Force DTR output to a logic 1 (normal default condition).
Logic 1 = Force DTR output to a logic 0.
UART with 16-byte FIFO and IrDA encoder/decoder
Figure
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
10). In this mode, the
SC16C550
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