SC16C554DB NXP Semiconductors, SC16C554DB Datasheet - Page 22

• Manufacturer Part Number: SC16C554DB
• Description: 5 V 3.3 V and 2.5 V quad UART - 5 Mbit/s (max.) with 16-byte FIFOs
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 13133
Product data sheet
Fig 13. Internal loop-back mode diagram (68 mode)
D0 to D7
A0 to A4
RXRDY
RESET
TXRDY
16/68
R/W
IRQ
CS
SC16C554B/554DB
INTERRUPT
REGISTER
CONTROL
DATA BUS
CONTROL
SELECT
LOGIC
LOGIC
LOGIC
AND
5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 16-byte FIFOs
Rev. 01 — 9 February 2005
XTAL1
REGISTERS
REGISTERS
GENERATOR
CLOCK AND
TRANSMIT
BAUD RATE
CONTROL
CONTROL
RECEIVE
LOGIC
LOGIC
FLOW
FLOW
FIFO
FIFO
XTAL2
TRANSMIT
REGISTER
REGISTER
RECEIVE
CONTROL
SC16C554B/554DB
SHIFT
SHIFT
MODEM
LOGIC
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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TXA to TXD
RXA to RXD
RTSA to RTSD
CTSA to CTSD
DTRA to DTRD
DSRA to DSRD
OP1A to OP1D
RIA to RID
OP2A to OP2D
CDA to CDD
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