SC16C650BIBS PHILIPS [NXP Semiconductors], SC16C650BIBS Datasheet - Page 22

• 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 10:
Table 11:
Table 12:
Bit
2
1
0
FCR[7]
0
0
1
1
FCR[5]
0
0
1
1
Symbol
FCR[2]
FCR[1]
FCR[0]
FIFO Control Register bits description
RCVR trigger levels
TX FIFO trigger levels
FCR[6]
0
1
0
1
FCR[4]
0
1
0
1
Rev. 03 — 10 December 2004
Description
Transmit operation in mode ‘1’: When the SC16C650B is in FIFO
mode (FCR[0] = logic 1; FCR[3] = logic 1), the TXRDY pin will be a
logic 1 when the transmit FIFO is completely full. It will be a logic 0 when
FIFO has 1 empty space.
Receive operation in mode ‘1’: When the SC16C650B is in FIFO
mode (FCR[0] = logic 1; FCR[3] = logic 1) and the trigger level has been
reached, or a Receive Time-Out has occurred, the RXRDY pin will go to
a logic 0. Once activated, it will go to a logic 1 after there are no more
characters in the FIFO.
XMIT FIFO reset.
RCVR FIFO reset.
FIFO enable.
Logic 0 = No FIFO transmit reset (normal default condition).
Logic 1 = Clears the contents of the transmit FIFO and resets the
FIFO counter logic (the transmit shift register is not cleared or
altered). This bit will return to a logic 0 after clearing the FIFO.
Logic 0 = No FIFO receive reset (normal default condition).
Logic 1 = Clears the contents of the receive FIFO and resets the FIFO
counter logic (the receive shift register is not cleared or altered). This
bit will return to a logic 0 after clearing the FIFO.
Logic 0 = Disable the transmit and receive FIFO (normal default
condition).
Logic 1 = Enable the transmit and receive FIFO. This bit must be a
‘1’ when other FCR bits are written to, or they will not be
programmed.
RX FIFO trigger level (bytes)
8
16
24
28
TX FIFO trigger level (bytes)
16
8
24
30
UART with 32-byte FIFOs and IrDA encoder/decoder
…continued
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
SC16C650B
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