參數(shù)資料
型號: SC16C754BIA68,529
廠商: NXP Semiconductors
文件頁數(shù): 2/50頁
文件大?。?/td> 0K
描述: IC UART QUAD 64BYTE 68PLCC
標準包裝: 18
通道數(shù): 4,QUART
FIFO's: 64 字節(jié)
電源電壓: 2.5V,3.3V,5V
帶自動流量控制功能:
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
安裝類型: 表面貼裝
封裝/外殼: 68-LCC(J 形引線)
供應商設備封裝: 68-PLCC
包裝: 管件
其它名稱: 935274938529
SC16C754BIA68-S
SC16C754BIA68-S-ND
SC16C754B_4
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 6 October 2008
10 of 51
NXP Semiconductors
SC16C754B
5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 64-byte FIFOs
6.2 Hardware ow control
Hardware ow control is comprised of auto-CTS and auto-RTS. Auto-CTS and auto-RTS
can be enabled/disabled independently by programming EFR[7:6].
With auto-CTS, CTS must be active before the UART can transmit data.
Auto-RTS only activates the RTS output when there is enough room in the FIFO to receive
data and de-activates the RTS output when the RX FIFO is sufciently full. The halt and
resume trigger levels in the TCR determine the levels at which RTS is
activated/deactivated.
If both auto-CTS and auto-RTS are enabled, when RTS is connected to CTS, data
transmission does not occur unless the receiver FIFO has empty space. Thus, overrun
errors are eliminated during hardware ow control. If not enabled, overrun errors occur if
the transmit data rate exceeds the receive FIFO servicing latency.
Fig 5.
Autoow 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
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