參數(shù)資料
型號： SC16C554B
廠商： NXP Semiconductors N.V.
英文描述： 5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 16-byte FIFOs
中文描述： 5伏，3.3伏和2.5伏兆5四異步/秒（最大），16字節(jié)的FIFO
文件頁數(shù)： 15/51頁
文件大?。?/td> 253K
代理商： SC16C554B
9397 750 13133
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 01 — 9 February 2005
15 of 51
Philips Semiconductors
SC16C554B/554DB
5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 16-byte FIFOs
6.2 Internal registers
The SC16C554B/554DB provides 12 internal registers for monitoring and control. These
registers are shown in
Table 5
. These 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). Register functions are more fully described in the
following paragraphs.
[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.
6.3 FIFO operation
The 16 byte transmit and receive data FIFOs are enabled by the FIFO Control Register
(FCR) bit 0. With SC16C554B devices, the user can set the receive trigger level, but not
the transmit trigger level. The receiver FIFO section includes a time-out function to ensure
data is delivered to the external CPU. An interrupt is generated whenever the Receive
Holding Register (RHR) has not been read following the loading of a character or the
receive trigger level has not been reached.
Table 5:
A2
General register set (THR/RHR, IER/ISR, MCR/MSR, FCR, LSR, SPR)
[1]
0
0
0
Receive Holding Register
0
0
1
Interrupt Enable Register
0
1
0
Interrupt Status Register
0
1
1
Line Control Register
1
0
0
Modem Control Register
1
0
1
Line Status Register
1
1
0
Modem Status Register
1
1
1
Scratchpad Register
Baud rate register set (DLL/DLM)
[2]
0
0
0
LSB of Divisor Latch
0
0
1
MSB of Divisor Latch
Internal registers decoding
A0
Read mode
A1
Write mode
Transmit Holding Register
Interrupt Enable Register
FIFO Control Register
Line Control Register
Modem Control Register
n/a
n/a
Scratchpad Register
LSB of Divisor Latch
MSB of Divisor Latch
Table 6:
Selected trigger level
(characters)
1
4
8
14
Flow control mechanism
INT pin activation
Negate RTS
Assert RTS
1
4
8
14
4
8
12
14
1
4
8
10
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC16C554B_10 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 16-byte FIFOs
SC16C554BIB64 功能描述:UART 接口集成電路 16CB 2.5V-5V 4CH UART 16B FIFO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16C554BIB64,128 功能描述:UART 接口集成電路 16CB 2.5V-5V 4CH RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16C554BIB64,128 PBF 制造商:NXP Semiconductors 功能描述:
SC16C554BIB64,151 功能描述:UART 接口集成電路 4CH. UART 16B FIFO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
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