參數資料
型號: SC16C754BIB80,551
廠商: NXP Semiconductors
文件頁數: 25/50頁
文件大?。?/td> 0K
描述: IC UART QUAD 64BYTE 80LQFP
標準包裝: 119
通道數: 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:
帶調制解調器控制功能:
安裝類型: 表面貼裝
封裝/外殼: 80-LQFP
供應商設備封裝: 80-LQFP(12x12)
包裝: 托盤
其它名稱: 935274939551
SC16C754BIB80-S
SC16C754BIB80-S-ND
SC16C754B_4
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 6 October 2008
31 of 51
NXP Semiconductors
SC16C754B
5 V, 3.3 V and 2.5 V quad UART, 5 Mbit/s (max.) with 64-byte FIFOs
7.10 Enhanced Feature Register (EFR)
This 8-bit register enables or disables the enhanced features of the UART. Table 19 shows
the enhanced feature register bit settings.
7.11 Divisor latches (DLL, DLM)
These are two 8-bit registers which store the 16-bit divisor for generation of the baud clock
in the baud rate generator. DLM stores the most signicant part of the divisor. DLL stores
the least signicant part of the divisor.
Note that DLL and DLM can only be written to before Sleep mode is enabled, that is,
before IER[4] is set.
Table 19.
Enhanced feature register bits description
Bit
Symbol
Description
7
EFR[7]
CTS ow control enable.
logic 0 = CTS ow control is disabled (normal default condition)
logic 1 = CTS ow control is enabled. Transmission will stop when a HIGH
signal is detected on the CTS pin.
6
EFR[6]
RTS ow control enable.
logic 0 = RTS ow control is disabled (normal default condition)
logic 1 = RTS ow control is enabled. The RTS pin goes HIGH when the
receiver FIFO HALT trigger level TCR[3:0] is reached, and goes LOW when
the receiver FIFO RESUME transmission trigger level TCR[7:4] is reached.
5
EFR[5]
Special character detect.
logic 0 = special character detect disabled (normal default condition)
logic 1 = special character detect enabled. Received data is compared with
Xoff2 data. If a match occurs, the received data is transferred to FIFO and
IIR[4] is set to a logic 1 to indicate a special character has been detected.
4
EFR[4]
Enhanced functions enable bit.
logic 0 = disables enhanced functions and writing to IER[7:4], FCR[5:4],
MCR[7:5].
logic 1 = enables the enhanced function IER[7:4], FCR[5:4], and MCR[7:5]
can be modied, that is, this bit is therefore a write enable.
3:0
EFR[3:0]
Combinations of software ow control can be selected by programming these
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