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參數(shù)資料
| 型號： | SC16C554DIA68,512 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 8/55頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART QUAD W/FIFO 68-PLCC |
| 標(biāo)準(zhǔn)包裝： | 18 |
| 通道數(shù)： | 4，QUART |
| FIFO's： | 16 字節(jié) |
| 電源電壓： | 2.5V，3.3V，5V |
| 帶自動流量控制功能： | 是 |
| 帶IrDA 編碼器/解碼器： | 是 |
| 帶故障啟動位檢測功能： | 是 |
| 帶調(diào)制解調(diào)器控制功能： | 是 |
| 帶CMOS： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 68-LCC（J 形引線） |
| 供應(yīng)商設(shè)備封裝： | 68-PLCC |
| 包裝： | 管件 |
| 其它名稱： | 568-1110-5 935271490512 SC16C554DIA68 |
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Philips Semiconductors
SC16C554/554D
Quad UART with 16-byte FIFO and infrared (IrDA) encoder/decoder
Product data
Rev. 05 — 10 May 2004
16 of 55
9397 750 13132
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
6.6 Hardware ow control
When automatic hardware ow control is enabled, the SC16C554/554D monitors the
CTS pin for a remote buffer overow indication and controls the RTS pin for local
buffer overows. Automatic hardware ow control is selected by setting EFR[6] (RTS)
and EFR[7] (CTS) to a logic 1. If CTS transitions from a logic 0 to a logic 1 indicating
a ow control request, ISR[5] will be set to a logic 1 (if enabled via IER[6,7]), and the
SC16C554/554D will suspend TX transmissions as soon as the stop bit of the
character in process is shifted out. Transmission is resumed after the CTS input
returns to a logic 0, indicating more data may be sent.
With the Auto RTS function enabled, an interrupt is generated when the receive FIFO
reaches the programmed trigger level. The RTS pin will not be forced to a logic 1
(RTS off), until the receive FIFO reaches the next trigger level. However, the RTS pin
will return to a logic 0 after the data buffer (FIFO) is unloaded to the next trigger level
below the programmed trigger. However, under the above described conditions, the
SC16C554/554D will continue to accept data until the receive FIFO is full.
6.7 Software ow control
When software ow control is enabled, the SC16C554/554D compares one or two
sequential receive data characters with the programmed Xon/Xoff or Xoff1,2
character value(s). If received character(s) match the programmed values, the
SC16C554/554D will halt transmission (TX) as soon as the current character(s) has
completed transmission. When a match occurs, the receive ready (if enabled via Xoff
IER[5]) ags will be set and the interrupt output pin (if receive interrupt is enabled) will
be activated. Following a suspension due to a match of the Xoff characters’ values,
the SC16C554/554D will monitor the receive data stream for a match to the Xon1,2
character value(s). If a match is found, the SC16C554/554D will resume operation
and clear the ags (ISR[4]).
Reset initially sets the contents of the Xon/Xoff 8-bit ow control registers to a logic 0.
Following reset, the user can write any Xon/Xoff value desired for software ow
control. Different conditions can be set to detect Xon/Xoff characters and
suspend/resume transmissions. When double 8-bit Xon/Xoff characters are selected,
the SC16C554/554D compares two consecutive receive characters with two software
ow control 8-bit values (Xon1, Xon2, Xoff1, Xoff2) and controls TX transmissions
accordingly. Under the above described ow control mechanisms, ow control
characters are not placed (stacked) in the user accessible RX data buffer or FIFO.
In the event that the receive buffer is overlling and ow control needs to be executed,
the SC16C554/554D automatically sends an Xoff message (when enabled) via the
serial TX output to the remote modem. The SC16C554/554D sends the Xoff1,2
Table 6:
Flow control mechanism
Selected trigger level
(characters)
INT pin activation
Negate RTS or
send Xoff
Assert RTS or
send Xon
11
4
1
44
8
4
8
12
8
14
10
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| SC16C554DIB64 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Quad UART with 16-byte FIFO and infrared (IrDA) encoder/decoder |
| SC16C554DIB64,128 | 功能描述:UART 接口集成電路 16C 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 |
| SC16C554DIB64,151 | 功能描述:UART 接口集成電路 16C 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 |
| SC16C554DIB64,157 | 功能描述:UART 接口集成電路 16C 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 |
| SC16C554IB64 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Quad UART with 16-byte FIFO and infrared (IrDA) encoder/decoder |
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