SC16C754BIBM,128 NXP Semiconductors, SC16C754BIBM,128 Datasheet - Page 16

• Manufacturer Part Number: SC16C754BIBM,128
• Description: IC UART QUAD 64BYTE 64LQFP
• Manufacturer: NXP Semiconductors

Specifications of SC16C754BIBM,128

• Number Of Channels: 4, QUART
• Fifo's: 64 Byte
• Voltage - Supply: 2.5V, 3.3V, 5V
• With Auto Flow Control: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935279069128; SC16C754BIBM-F; SC16C754BIBM-F

NXP Semiconductors
SC16C754B_4
Product data sheet
6.5.1 Interrupt mode operation
6.5.2 Polled mode operation
In interrupt mode (if any bit of IER[3:0] is ‘1’) the processor is informed of the status of the
receiver and transmitter by an interrupt signal, INT. Therefore, it is not necessary to
continuously poll the Line Status Register (LSR) to see if any interrupt needs to be
serviced.
In polled mode (IER[3:0] = 0000) the status of the receiver and transmitter can be
checked by polling the Line Status Register (LSR). This mode is an alternative to the FIFO
interrupt mode of operation where the status of the receiver and transmitter is
automatically known by means of interrupts sent to the CPU.
mode operation.
Fig 9.
Fig 10. FIFO polled mode operation
Interrupt mode operation
Figure 9
PROCESSOR
PROCESSOR
shows interrupt mode operation.
5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 64-byte FIFOs
Rev. 04 — 6 October 2008
IOW / IOR
IOW / IOR
INT
THR
THR
IIR
Figure 10
LSR
IER
IER
1
0
SC16C754B
1
0
RHR
RHR
002aaa230
002aaa231
1
0
shows FIFO polled
1
0
© NXP B.V. 2008. All rights reserved.
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