參數(shù)資料
型號: SC16IS752IPW
廠商: NXP Semiconductors N.V.
元件分類: 連接器件
英文描述: Dual UART with I2C-bus-SPI interface, 64 bytes of transmit and receive FIFOs, IrDA SIR built-in support
封裝: SC16IS752IBS<SOT617-1 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-1.html<1<Always Pb-free,;SC16IS752IBS<SOT617-1 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-1.html&
文件頁數(shù): 15/60頁
文件大小: 356K
代理商: SC16IS752IPW
SC16IS752_SC16IS762
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NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 8 — 1 September 2011
15 of 60
NXP Semiconductors
SC16IS752; SC16IS762
Dual UART with I
2
C-bus/SPI interface, 64-byte FIFOs, IrDA SIR
7.5.1
Interrupt mode operation
In Interrupt mode (if any bit of IER[3:0] is 1) the host is informed of the status of the
receiver and transmitter by an interrupt signal, IRQ. Therefore, it is not necessary to
continuously poll the Line Status Register (LSR) to see if any interrupt needs to be
serviced.
Figure 8
shows Interrupt mode operation.
7.5.2
Polled mode operation
In Polled mode (IER[3:0] = 0000) the status of the receiver and transmitter can be
checked by polling the Line Status Register (LSR). This mode is an alternative to the FIFO
Interrupt mode of operation where the status of the receiver and transmitter is
automatically known by means of interrupts sent to the CPU.
Figure 9
shows FIFO Polled
mode operation.
Fig 8.
Interrupt mode operation
1
1
1
1
IIR
IER
THR
RHR
HOST
IRQ
002aab042
read IIR
Fig 9.
FIFO Polled mode operation
0
0
0
0
LSR
IER
THR
RHR
HOST
read LSR
002aab043
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