SC16C550BIBS,128 NXP Semiconductors, SC16C550BIBS,128 Datasheet - Page 25

• Manufacturer Part Number: SC16C550BIBS,128
• Description: IC UART SOT617-1
• Manufacturer: NXP Semiconductors

Specifications of SC16C550BIBS,128

• Features: Programmable
• Number Of Channels: 1, UART
• Fifo's: 16 Byte
• Voltage - Supply: 2.5V, 3.3V, 5V
• With Auto Flow Control: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935279497128; SC16C550BIBS-F; SC16C550BIBS-F

NXP Semiconductors
SC16C550B_5
Product data sheet
7.6 Modem Control Register (MCR)
This register controls the interface with the modem or a peripheral device.
Table 19.
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
Description
reserved; set to ‘0’
reserved; set to ‘0’
Auto flow control enable.
Loopback. Enable the local loopback mode (diagnostics). In this mode the
transmitter output (TX) and the receiver input (RX), CTS, DSR, DCD, and
RI are disconnected from the SC16C550B I/O pins. Internally the modem
data and control pins are connected into a loopback data configuration
(see
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. Used to control the modem DCD signal in the loopback mode.
OUT1. This bit is used in the Loopback mode only. In the loopback mode,
this bit is used to write the state of the modem RI interface signal via
OUT1.
RTS
DTR
Rev. 05 — 1 October 2008
logic 0 = disable loopback mode (normal default condition)
logic 1 = enable local loopback mode (diagnostics)
logic 0 = OUT2 is at logic 1. In the loopback mode, sets OUT2 (DCD)
internally to a logic 1.
logic 1 = OUT2 is at logic 0. In the loopback 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
Figure
11). In this mode, the receiver and transmitter interrupts
5 V, 3.3 V and 2.5 V UART with 16-byte FIFOs
SC16C550B
© NXP B.V. 2008. All rights reserved.
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