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SC16C754BIBM-S Datasheet

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Philips Semiconductors
SC16C754
Quad UART with 64-byte FIFO
Interrupt Enable Register bits description
鈥ontinued
Description
Sleep mode.
Logic 0 = Disable sleep mode (normal default condition).
Logic 1 = Enable sleep mode. See
Section 6.7 鈥淪leep mode鈥?/div>
for details.
Table 16:
Bit
4
Symbol
IER[4]
[1]
3
IER[3]
Modem Status Interrupt.
Logic 0 = Disable the modem status register interrupt (normal default
condition).
Logic 1 = Enable the modem status register interrupt.
2
IER[2]
Receive Line Status interrupt.
Logic 0 = Disable the receiver line status interrupt (normal default
condition).
Logic 1 = Enable the receiver line status interrupt.
1
IER[1]
Transmit Holding Register interrupt.
Logic 0 = Disable the THR interrupt (normal default condition).
Logic 1 = Enable the THR interrupt.
0
IER[0]
Receive Holding Register interrupt.
Logic 0 = Disable the RHR interrupt (normal default condition).
Logic 1 = Enable the RHR interrupt.
[1]
IER[7:4] can only be modi铿乪d if EFR[4] is set, i.e., EFR[4] is a write enable. Re-enabling IER[1] will
not cause a new interrupt if the THR is below the threshold.
7.9 Interrupt identi铿乧ation 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 identi铿乧ation register bit settings.
Table 17:
Bit
7-6
5
4
3-1
0
Interrupt Identi铿乧ation Register bits description
Description
Mirror the contents of FCR[0].
RTS/CTS LOW-to-HIGH change of state.
1 = Xoff/Special character has been detected.
3-bit encoded interrupt. See
Table 18.
Interrupt status.
Logic 0 = An interrupt is pending.
Logic 1 = No interrupt is pending.
Symbol
IIR[7:6]
IIR[5]
IIR[4]
IIR[3:1]
IIR[0]
The interrupt priority list is shown in
Table 18.
9397 750 11618
漏 Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Product data
Rev. 04 鈥?19 June 2003
28 of 49

SC16C754BIBM-S 产品属性

  • NXP

  • UART 接口集成电路

  • 4

  • 5 Mbps

  • 5.5 V

  • 2.25 V

  • 6 mA

  • + 85 C

  • - 40 C

  • LQFP-64

  • Bulk

  • SMD/SMT

  • 2.5 V, 3.3 V, 5 V

  • 250

  • SC16C754BIBM,151

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