參數(shù)資料
型號(hào): SC16C752BIB48,128
廠商: NXP Semiconductors
文件頁數(shù): 21/47頁
文件大?。?/td> 0K
描述: IC DUAL UART 64BYTE 48LQFP
標(biāo)準(zhǔn)包裝: 2,000
通道數(shù): 2,DUART
FIFO's: 64 字節(jié)
電源電壓: 2.5V,3.3V,5V
帶自動(dòng)流量控制功能:
帶故障啟動(dòng)位檢測(cè)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: 48-LQFP
供應(yīng)商設(shè)備封裝: 48-LQFP(7x7)
包裝: 帶卷 (TR)
其它名稱: 935274411128
SC16C752BIB48-F
SC16C752BIB48-F-ND
SC16C752B
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 6 — 30 November 2010
28 of 47
NXP Semiconductors
SC16C752B
5 V, 2.2 V and 2.5 V dual UART, 5 Mbit/s (max.), with 64-byte FIFOs
7.9 Interrupt Identification Register (IIR)
The IIR is a read-only 8-bit register which provides the source of the interrupt in a
prioritized manner. Table 17 shows Interrupt Identification Register bit settings.
The interrupt priority list is shown in Table 18.
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.
Table 17.
Interrupt Identification Register bits description
Bit
Symbol
Description
7:6
IIR[7:6]
Mirror the contents of FCR[0]
5
IIR[5]
RTSn/CTSn LOW-to-HIGH change of state
4
IIR[4]
1 = Xoff/Special character has been detected
3:1
IIR[3:1]
3-bit encoded interrupt. See Table 18.
0
IIR[0]
Interrupt status.
logic 0 = an interrupt is pending
logic 1 = no interrupt is pending
Table 18.
Interrupt priority list
Priority
level
IIR[5]
IIR[4]
IIR[3]
IIR[2]
IIR[1]
IIR[0]
Source of the interrupt
1
0
0011
0Receiver Line Status error
2
0
0110
0Receiver time-out interrupt
2
0
0010
0
RHR interrupt
3
0
0001
0THR interrupt
4
0
0000
0Modem interrupt
5
0
1000
0Received Xoff signal/ special
character
6
1
0000
0CTSn, RTSn change of state from
active (LOW) to inactive (HIGH)
Table 19.
Enhanced Feature Register bits description
Bit
Symbol
Description
7EFR[7]
CTS flow control enable.
logic 0 = CTS flow control is disabled (normal default condition)
logic 1 = CTS flow control is enabled. Transmission will stop when a HIGH
signal is detected on the CTSn pin.
6
EFR[6]
RTS flow control enable.
logic 0 = RTS flow control is disabled (normal default condition)
logic 1 = RTS flow control is enabled. The RTSn 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.
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