SC16C850IBS NXP [NXP Semiconductors], SC16C850IBS Datasheet - Page 33

• Manufacturer Part Number: SC16C850IBS
• Description: 2.5 V to 3.3 V UART, 5 Mbit/s (max.) with 128-byte FIFOs, infrared (IrDA), and 16 mode or 68 mode parallel bus interface
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
SC16C850_1
Product data sheet
7.15 Transmit Interrupt Level Register (TXINTLVL)
7.16 Receive Interrupt Level Register (RXINTLVL)
Table 24.
[1]
This 8-bit register is used to store the transmit FIFO trigger levels used for interrupt
generation. Trigger levels from 1 to 128 can be programmed with a granularity of 1.
Table 25
Table 25.
[1]
This 8-bit register is used store the receive FIFO trigger levels used for interrupt
generation. Trigger levels from 1 to 128 can be programmed with a granularity of 1.
Table 26
Table 26.
Cont-3
0
1
0
1
X
X
X
1
0
1
Bit
7:0
Bit
7:0
When using a software flow control the Xon/Xoff characters cannot be used for data transfer.
For 32-byte FIFO mode, refer to
Symbol
TXINTLVL[7:0]
shows the TXINTLVL register bit settings.
shows the RXINTLVL register bit settings.
Symbol
RXINTLVL[7:0]
Cont-2
0
0
1
1
X
X
X
0
1
1
Software flow control functions
TXINTLVL register bits description
RXINTLVL register bits description
2.5 V to 3.3 V UART with 128-byte FIFOs and IrDA encoder/decoder
Cont-1
X
X
X
X
0
1
0
1
1
1
Rev. 01 — 10 January 2008
Description
This register stores the programmable transmit interrupt trigger levels
for 128-byte FIFO mode
Description
This register stores the programmable receive interrupt trigger levels
for 128-byte FIFO mode
0x00 = trigger level is set to 1
0x01 = trigger level is set to 1
...
0x80 = trigger level is set to 128
0x00 = trigger level is set to 1
0x01 = trigger level is set to 1
...
0x80 = trigger level is set to 128
Cont-0
X
X
X
X
0
0
1
1
1
1
Section
7.3.
TX, RX software flow controls
No transmit flow control
Transmit Xon1/Xoff1
Transmit Xon2/Xoff2
Transmit Xon1 and Xon2/Xoff1 and Xoff2
No receive flow control
Receiver compares Xon1/Xoff1
Receiver compares Xon2/Xoff2
Transmit Xon1/Xoff1
Receiver compares Xon1 or Xon2, Xoff1 or Xoff2
Transmit Xon2/Xoff2
Receiver compares Xon1 or Xon2, Xoff1 or Xoff2
Transmit Xon1 and Xon2, Xoff1 and Xoff2
Receiver compares Xon1 and Xon2, Xoff1 and Xoff2
[1]
[1]
[1]
.
.
SC16C850
© NXP B.V. 2008. All rights reserved.
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