SC16C654DB NXP Semiconductors, SC16C654DB Datasheet - Page 36

• Manufacturer Part Number: SC16C654DB
• Description: 5 V - 3.3 V and 2.5 V quad UART - 5 Mbit/s (max.)
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 14965
Product data sheet
7.11 SC16C654B/654DB external reset conditions
Table 23:
[1]
Table 24:
Table 25:
Cont-3
0
1
0
1
X
X
X
1
0
1
Register
IER
ISR
LCR
MCR
LSR
MSR
FCR
EFR
Output
TXA, TXB, TXC, TXD
RTSA, RTSB, RTSC, RTSD
DTRA, DTRB, DTRC, DTRD
RXRDY
TXRDY
When using software flow control the Xon/Xoff characters cannot be used for data transfer.
Cont-2
0
0
1
1
X
X
X
0
1
1
Software flow control functions
Reset state for registers
Reset state for outputs
Reset state
IER[7:0] = 0
ISR[7:1] = 0; ISR[0] = 1
LCR[7:0] = 0
MCR[7:0] = 0
LSR[7] = 0; LSR[6:5] = 1; LSR[4:0] = 0
MSR[7:4] = input signals; MSR[3:0] = 0
FCR[7:0] = 0
EFR[7:0] = 0
5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 64-byte FIFOs
Cont-1
X
X
X
X
0
1
0
1
1
1
Rev. 02 — 20 June 2005
Cont-0
X
X
X
X
0
0
1
1
1
1
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 and Xon2, Xoff1 and Xoff2
transmit Xon2/Xoff2
receiver compares Xon1 and Xon2/Xoff1 and Xoff2
transmit Xon1 and Xon2/Xoff1 and Xoff2
receiver compares Xon1 and Xon2/Xoff1 and Xoff2
Reset state
HIGH
HIGH
HIGH
HIGH
LOW
[1]
SC16C654B/654DB
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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