SC16C850VIBS,128 NXP Semiconductors, SC16C850VIBS,128 Datasheet - Page 26

• Manufacturer Part Number: SC16C850VIBS,128
• Description: IC UART SINGLE W/FIFO 32-HVQFN
• Manufacturer: NXP Semiconductors

Specifications of SC16C850VIBS,128

• Features: Programmable
• Number Of Channels: 1, UART
• Fifo's: 128 Byte
• Protocol: RS485
• Voltage - Supply: 1.8V
• 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: 32-VFQFN Exposed Pad
• Transmitter And Receiver Fifo Counter: Yes
• Data Rate: 5Mbps
• Mounting: Surface Mount
• Pin Count: 32
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935283087128; SC16C850VIBS-F; SC16C850VIBS-F

NXP Semiconductors
SC16C850V
Product data sheet
7.7 Line Status Register (LSR)
Table 19.
This register provides the status of data transfers between the SC16C850V and the CPU.
Table 20.
MCR[5]
0
1
Bit
7
6
5
4
3
2
1
Symbol
LSR[7]
LSR[6]
LSR[5]
LSR[4]
LSR[3]
LSR[2]
LSR[1]
Interrupt output control
Line Status Register bits description
Single UART with 128-byte FIFOs, IrDA, and XScale VLIO bus interface
Description
FIFO data error.
THR and TSR empty. This bit is the Transmit Empty indicator. This bit is set to a
logic 1 whenever the transmit holding register and the transmit shift register are
both empty. It is reset to logic 0 whenever either the THR or TSR contains a data
character. In the FIFO mode, this bit is set to logic 1 whenever the transmit FIFO
and transmit shift register are both empty.
THR empty. This bit is the Transmit Holding Register Empty indicator. This bit
indicates that the UART is ready to accept a new character for transmission. In
addition, this bit causes the UART to issue an interrupt to CPU when the THR
interrupt enable is set. The THR bit is set to a logic 1 when a character is
transferred from the transmit holding register into the transmitter shift register.
The bit is reset to a logic 0 concurrently with the loading of the transmitter holding
register by the CPU. In the FIFO mode, this bit is set when the transmit FIFO is
empty; it is cleared when at least 1 byte is written to the transmit FIFO.
Break interrupt.
Framing error.
Parity error.
Overrun error.
All information provided in this document is subject to legal disclaimers.
logic 0 = no error (normal default condition)
logic 1 = at least one parity error, framing error or break indication is in the
current FIFO data. This bit is cleared when there are no remaining error flags
associated with the remaining data in the FIFO.
logic 0 = no break condition (normal default condition)
logic 1 = the receiver received a break signal (RX was a logic 0 for one
character frame time). In the FIFO mode, only one break character is loaded
into the FIFO.
logic 0 = no framing error (normal default condition)
logic 1 = framing error. The receive character did not have a valid stop bit(s). In
the FIFO mode, this error is associated with the character at the top of the
FIFO.
logic 0 = no parity error (normal default condition
logic 1 = parity error. The receive character does not have correct parity
information and is suspect. In the FIFO mode, this error is associated with the
character at the top of the FIFO.
logic 0 = no overrun error (normal default condition)
logic 1 = overrun error. A data overrun error occurred in the Receive Shift
Register. This happens when additional data arrives while the FIFO is full. In
this case, the previous data in the shift register is overwritten. Note that under
this condition, the data byte in the Receive Shift Register is not transferred into
the FIFO, therefore the data in the FIFO is not corrupted by the error.
INT output
active
open-source
Rev. 5 — 19 January 2011
SC16C850V
© NXP B.V. 2011. All rights reserved.
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