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參數(shù)資料
| 型號： | SC68C752B |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 64-byte FIFOs and Motorola mP interface |
| 中文描述： | 5伏，3.3伏和2.5伏兆5雙UART /秒（最大），64字節(jié)的FIFO和摩托羅拉手機(jī)接口 |
| 文件頁數(shù)： | 8/46頁 |
| 文件大?。?/td> | 219K |
| 代理商： | SC68C752B |
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9397 750 14963
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 02 — 28 April 2005
8 of 46
Philips Semiconductors
SC68C752B
5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 64-byte FIFOs
6.2.1
Auto-RTS
Auto-RTS data flow control originates in the receiver block (see
Figure 1 “Block diagram of
SC68C752B” on page 3
).
Figure 4
shows RTS functional timing. The receiver FIFO trigger
levels used in Auto-RTS are stored in the TCR. RTS is active if the RX FIFO level is below
the halt trigger level in TCR[3:0]. When the receiver FIFO halt trigger level is reached,
RTS is de-asserted. The sending device (for example, another UART) may send an
additional byte after the trigger level is reached (assuming the sending UART has another
byte to send) because it may not recognize the de-assertion of RTS until it has begun
sending the additional byte. RTS is automatically reasserted once the receiver FIFO
reaches the resume trigger level programmed via TCR[7:4]. This re-assertion allows the
sending device to resume transmission.
Fig 3.
Auto flow control (Auto-RTS and Auto-CTS) example
RX
FIFO
FLOW
CONTROL
TX
FIFO
PARALLEL
TO SERIAL
TX
FIFO
RX
FIFO
UART 1
UART 2
D7 to D0
RX
TX
RTS
CTS
TX
RX
CTS
RTS
D7 to D0
002aaa228
SERIAL TO
PARALLEL
SERIAL TO
PARALLEL
FLOW
CONTROL
FLOW
CONTROL
FLOW
CONTROL
PARALLEL
TO SERIAL
(1) N = receiver FIFO trigger level.
(2) The two blocks in dashed lines cover the case where an additional byte is sent, as described in
Section 6.2.1
.
Fig 4.
RTS functional timing
Start
byte N
Start
byte N
+
1
Start
Stop
Stop
RX
RTS
R/W
N
N
+
1
1
2
002aab086
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC68C752BIB48 | 功能描述:UART 接口集成電路 2.5V-5V 2CH UART 64B FIFO MOT 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 |
| SC68C752BIB48,128 | 功能描述:UART 接口集成電路 2.5V-5V 2CH UART 64B 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 |
| SC68C752BIB48,151 | 功能描述:UART 接口集成電路 UART DUAL W/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 |
| SC68C752BIB48,157 | 功能描述:UART 接口集成電路 2.5V-5V 2CH UART 64B 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 |
| SC68C752BIB48-F | 功能描述:UART 接口集成電路 2.5V-5V 2CH UART 64B FIFO MOT 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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