SC16C750B Philips Semiconductors, SC16C750B Datasheet - Page 19

no-image

SC16C750B

Manufacturer Part Number
SC16C750B
Description
5 V/ 3.3 V and 2.5 V UART with 64-byte FIFOs
Manufacturer
Philips Semiconductors
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SC16C750BIA44
Manufacturer:
PHILIPS
Quantity:
886
Part Number:
SC16C750BIA44,512
Manufacturer:
NXP Semiconductors
Quantity:
10 000
Part Number:
SC16C750BIA44,518
Manufacturer:
NXP Semiconductors
Quantity:
10 000
Part Number:
SC16C750BIA44,529
Manufacturer:
NXP Semiconductors
Quantity:
10 000
Part Number:
SC16C750BIB64,128
Manufacturer:
NXP Semiconductors
Quantity:
10 000
Part Number:
SC16C750BIB64,151
Manufacturer:
NXP Semiconductors
Quantity:
10 000
Part Number:
SC16C750BIB64157
Manufacturer:
NXP Semiconductors
Quantity:
135
Part Number:
SC16C750BIBS
Manufacturer:
BCD
Quantity:
738
Company:
Part Number:
SC16C750BIBS
Quantity:
980
Philips Semiconductors
9397 750 14453
Product data
7.3.1 DMA mode
7.3.2 FIFO mode
7.3 FIFO Control Register (FCR)
This register is used to enable the FIFOs, clear the FIFOs, set the receive FIFO
trigger levels, and select the DMA mode.
Mode 0 (FCR bit 3 = 0):
receive operation, and is similar to the 16C450 mode. Transmit Ready (TXRDY) will
go to a logic 0 whenever an empty transmit space is available in the Transmit Holding
Register (THR). Receive Ready (RXRDY) will go to a logic 0 whenever the Receive
Holding Register (RHR) is loaded with a character.
Mode 1 (FCR bit 3 = 1):
transmit interrupt is set when the transmit FIFO is below the programmed trigger
level. The receive interrupt is set when the receive FIFO fills to the programmed
trigger level. However, the FIFO continues to fill regardless of the programmed level
until the FIFO is full. RXRDY remains a logic 0 as long as the FIFO fill level is above
the programmed trigger level.
Table 10:
Bit
7:6
5
4
3
Symbol
FCR[7]
(MSB),
FCR[6]
(LSB)
FCR[5]
FCR[4]
FCR[3]
FIFO Control Register bits description
Rev. 03 — 13 December 2004
Description
RCVR trigger. These bits are used to set the trigger level for the receive
FIFO interrupt.
An interrupt is generated when the number of characters in the FIFO
equals the programmed trigger level. However, the FIFO will continue to
be loaded until it is full. Refer to
Logic 0 = 16-byte mode (normal default condition).
Logic 1 = 64-byte mode.
Reserved.
DMA mode select.
Transmit operation in mode ‘0’: When the SC16C750B is in the
16C450 mode (FIFOs disabled; FCR[0] = logic 0) or in the FIFO mode
(FIFOs enabled; FCR[0] = logic 1; FCR[3] = logic 0), and when there are
no characters in the transmit FIFO or transmit holding register, the
TXRDY pin will be a logic 0. Once active, the TXRDY pin will go to a
logic 1 after the first character is loaded into the transmit holding
register.
Receive operation in mode ‘0’: When the SC16C750B is in 16C450
mode, or in the FIFO mode (FCR[0] = logic 1; FCR[3] = logic 0) and
there is at least one character in the receive FIFO, the RXRDY pin will
be a logic 0. Once active, the RXRDY pin will go to a logic 1 when there
are no more characters in the receiver.
Logic 0 = Set DMA mode ‘0’ (normal default condition).
Logic 1 = Set DMA mode ‘1’
Set and enable the interrupt for each single transmit or
Set and enable the interrupt in a block mode operation. The
5 V, 3.3 V and 2.5 V UART with 64-byte FIFOs
Table
11.
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
SC16C750B
19 of 44

Related parts for SC16C750B