SC16C554BIB80,557 NXP Semiconductors, SC16C554BIB80,557 Datasheet - Page 19

• Manufacturer Part Number: SC16C554BIB80,557
• Description: IC UART QUAD SOT315-1
• Manufacturer: NXP Semiconductors

Specifications of SC16C554BIB80,557

• Number Of Channels: 4, QUART
• Package / Case: 80-LQFP
• Fifo's: 16 Byte
• Voltage - Supply: 2.5V, 3.3V, 5V
• With Auto Flow Control: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Data Rate: 5 Mbps
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.25 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 or 3.3 V or 5 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: 935274934557; SC16C554BIB80; SC16C554BIB80

NXP Semiconductors
SC16C554B_554DB
Product data sheet
Fig 10. CTS functional timing waveforms
Fig 11. RTS functional timing waveforms, RCV FIFO trigger level = 1 byte, 4 bytes, or 8 bytes
CTS
RTS
IOR
TX
RX
(1) When CTS is LOW, the transmitter keeps sending serial data out.
(2) If CTS goes HIGH before the middle of the last stop bit of the current byte, the transmitter finishes sending the current byte, but
(3) When CTS goes from HIGH to LOW, the transmitter begins sending data again.
(1) N = RCV FIFO trigger level (1 byte, 4 bytes, or 8 bytes).
(2) The two blocks in dashed lines cover the case where an additional byte is sent as described in
is does not send the next byte.
Start
6.4.3 Enabling autoflow control and auto-CTS
6.4.4 Auto-CTS and auto-RTS functional timing
Start
byte N
Remark: Auto-CTS is not supported in channel D of the HVQFN48 package, therefore
MCR[5] of channel D should not be written.
Autoflow control is enabled by setting MCR[5] and MCR[1].
Table 7.
bits 0 to 7
The receiver FIFO trigger level can be set to 1 byte, 4 bytes, 8 bytes, or 14 bytes. These
are described in
MCR[5]
1
1
0
Stop
Stop
Enabling autoflow control and auto-CTS
All information provided in this document is subject to legal disclaimers.
Figure 11
Start
5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 16-byte FIFOs
1
MCR[1]
1
0
X
Start
byte N + 1
Rev. 4 — 8 June 2010
and
2
bits 0 to 7
Figure
Stop
12.
Stop
Selection
auto RTS and CTS
auto CTS
disable
SC16C554B/554DB
N
N + 1
Section
Start
Start
6.4.1.
bits 0 to 7
© NXP B.V. 2010. All rights reserved.
byte
002aaa050
002aaa049
Stop
Stop
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