SC16C2550BIA44 datasheet(10/43 Pages) NXP | 5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs

部件名	SC16C2550BIA44

功能描述	5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs

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制造商	NXP [NXP Semiconductors]

网页	http://www.nxp.com

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10 / 43 page

SC16C2550B_5

Product data sheet

Rev. 05 — 12 January 2009

10 of 43

NXP Semiconductors

SC16C2550B

5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs

6.2 Internal registers

The SC16C2550B provides two sets of internal registers (A and B) consisting of

12 registers each for monitoring and controlling the functions of each channel of the

UART. These registers are shown in Table 5. The UART registers function as data holding

registers (THR/RHR), interrupt status and control registers (IER/ISR), a FIFO Control

Register (FCR), line status and control registers (LCR/LSR), modem status and control

registers (MCR/MSR), programmable data rate (clock) control registers (DLL/DLM) and a

user-accessible Scratchpad Register (SPR).

[1]

These registers are accessible only when LCR[7] is a logic 0.

[2]

These registers are accessible only when LCR[7] is a logic 1.

Table 4.

Serial port selection

Chip Select

Function

CSA, CSB = 1

none

CSA = 0

UART channel A

CSB = 0

UART channel B

Table 5.

Internal registers decoding

A2

A1

A0

READ mode

WRITE mode

General register set (THR/RHR, IER/ISR, MCR/MSR, FCR, LCR/LSR, SPR)[1]

0

Receive Holding Register

Transmit Holding Register

0

1

Interrupt Enable Register

0

1

0

Interrupt Status Register

FIFO Control Register

0

1

Line Control Register

1

0

Modem Control Register

1

0

1

Line Status Register

n/a

1

0

Modem Status Register

n/a

1

Scratchpad Register

Baud rate register set (DLL/DLM)[2]

0

LSB of Divisor Latch

0

1

MSB of Divisor Latch

类似零件编号 - SC16C2550BIA44

制造商	部件名	数据表	功能描述
NXP Semiconductors	SC16C2550BIA44	200Kb / 42P	5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs Rev. 02-14 December 2004
NXP Semiconductors	SC16C2550BIA44	211Kb / 43P	5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 16-byte FIFOs Rev. 04-15 February 2007

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类似说明 - SC16C2550BIA44

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