SC16C650BIBS PHILIPS [NXP Semiconductors], SC16C650BIBS Datasheet - Page 26

• Manufacturer Part Number: SC16C650BIBS
• Description: 5 V, 3.3 V and 2.5 V UART with 32-byte FIFOs and infrared (IrDA) encoder/decoder
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
9397 750 14451
Product data
Table 19:
Bit
5
4
3
2
1
0
Symbol
MCR[5]
MCR[4]
MCR[3]
MCR[2]
MCR[1]
MCR[0]
Modem Control Register bits description
Rev. 03 — 10 December 2004
Description
INT typ select.
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 SC16C650B I/O pins.
Internally the modem data and control pins are connected into a
loop-back data configuration (see
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 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
provide and acceptable logic 0 level
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 32-byte FIFOs and IrDA encoder/decoder
must be tied from the IRQA/INT pin to ground to
…continued
Figure
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8). In this mode, the receiver
SC16C650B
26 of 51