SC16IS741IPW,128 NXP Semiconductors, SC16IS741IPW,128 Datasheet - Page 9

• Manufacturer Part Number: SC16IS741IPW,128
• Description: IC UART 16TSSOP
• Manufacturer: NXP Semiconductors
• Type: IrDA or RS-232 or RS-485r

Specifications of SC16IS741IPW,128

• Number Of Channels: 1, UART
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Features: RS-485
• Fifo's: 64 Byte
• Protocol: RS232, RS485
• Voltage - Supply: 2.5V, 3.3V
• With Auto Flow Control: Yes
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• Mounting Type: Surface Mount
• Data Rate: 5 Mbps
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.3 V
• Supply Current: 6 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 2.5 V, 3.3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935290736128

NXP Semiconductors
SC16IS741_1
Product data sheet
7.3.2 TX
Xoff1/Xoff2 character is transmitted when the RX FIFO has passed the HALT trigger level
programmed in TCR[3:0] or the selectable trigger level in FCR[7:6]
Xon1/Xoff2 character is transmitted when the RX FIFO reaches the RESUME trigger level
programmed in TCR[7:4] or RX FIFO falls below the lower selectable trigger level in
FCR[7:6].
The transmission of Xoff/Xon(s) follows the exact same protocol as transmission of an
ordinary character from the FIFO. This means that even if the word length is set to be 5, 6,
or 7 bits, then the 5, 6, or 7 least significant bits of XOFF1/XOFF2 or XON1/XON2 will be
transmitted. (Note that the transmission of 5, 6, or 7 bits of a character is seldom done, but
this functionality is included to maintain compatibility with earlier designs.)
It is assumed that software flow control and hardware flow control will never be enabled
simultaneously.
Fig 7.
Example of software flow control
SERIAL-TO-PARALLEL
PARALLEL-TO-SERIAL
Figure 7
TRANSMIT FIFO
Xon1 WORD
Xon2 WORD
Xoff1 WORD
Xoff2 WORD
UART1
Single UART with I
Rev. 01 — 29 April 2010
shows an example of software flow control.
Xoff–Xon–Xoff
programmed
2
characters
compare
Xon-Xoff
C-bus/SPI interface, 64-byte FIFOs, IrDA SIR
data
SERIAL-TO-PARALLEL
PARALLEL-TO-SERIAL
RECEIVE FIFO
Xon2 WORD
Xon1 WORD
Xoff1 WORD
Xoff2 WORD
UART2
SC16IS741
© NXP B.V. 2010. All rights reserved.
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