參數(shù)資料
型號(hào)： SC16C652BIBS
廠商： NXP Semiconductors N.V.
元件分類(lèi)： 收發(fā)器
英文描述： 5 V, 3.3 V and 2.5 V dual UART, 5 Mbit-s (max.) with 32-byte FIFOs and infrared (IrDA) encoder-decoder
封裝： SC16C652BIB48<SOT313-2 (LQFP48)|<<http://www.nxp.com/packages/SOT313-2.html<1<Always Pb-free,;SC16C652BIB48<SOT313-2 (LQFP48)|<<http://www.nxp.com/packages/SOT313-2.html&
文件頁(yè)數(shù)： 20/43頁(yè)
文件大小： 210K
代理商： SC16C652BIBS
SC16C652B_4
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 04 — 1 September 2005
20 of 43
Philips Semiconductors
SC16C652B
Dual UART with 32-byte FIFOs and IrDA encoder/decoder
7.4 Interrupt Status Register (ISR)
The SC16C652B provides six levels of prioritized interrupts to minimize external software
interaction. The Interrupt Status Register (ISR) provides the user with six interrupt status
bits. Performing a read cycle on the ISR will provide the user with the highest pending
interrupt level to be serviced. No other interrupts are acknowledged until the pending
interrupt is serviced. A lower level interrupt may be seen after servicing the higher level
interrupt and re-reading the interrupt status bits.
Table 14 “Interrupt source”
shows the
data values (bits 5:0) for the six prioritized interrupt levels and the interrupt sources
associated with each of these interrupt levels.
Table 14:
Priority
level
1
Interrupt source
ISR[5]
ISR[4]
ISR[3]
ISR[2]
ISR[1]
ISR[0]
Source of the interrupt
0
0
0
1
1
0
LSR (Receiver Line Status
Register)
RXRDY (Received Data Ready)
RXRDY (Receive Data time-out)
TXRDY (Transmitter Holding
Register Empty)
MSR (Modem Status Register)
RXRDY (Received Xoff signal)/
Special character
CTS, RTS change of state
2
2
3
0
0
0
0
0
0
0
1
0
1
1
0
0
0
1
0
0
0
4
5
0
0
0
1
0
0
0
0
0
0
0
0
6
1
0
0
0
0
0
Table 15:
Bit
7:6
Interrupt Status Register bits description
Symbol
Description
ISR[7:6]
FIFOs enabled. These bits are set to a logic 0 when the FIFOs are not being
used in the 16C450 mode. They are set to a logic 1 when the FIFOs are
enabled in the SC16C652B mode.
logic 0 or cleared = default condition
ISR[5:4]
INT priority bits 4:3. These bits are enabled when EFR[4] is set to a logic 1.
ISR[4] indicates that matching Xoff character(s) have been detected. ISR[5]
indicates that CTS, RTS have been generated. Note that once set to a
logic 1, the ISR[4] bit will stay a logic 1 until Xon character(s) are received.
logic 0 or cleared = default condition
ISR[3:1]
INT priority bits 2:0. These bits indicate the source for a pending interrupt at
interrupt priority levels 1, 2, and 3 (see
Table 14
).
logic 0 or cleared = default condition
ISR[0]
INT status.
logic 0 = an interrupt is pending and the ISR contents may be used as a
pointer to the appropriate interrupt service routine
logic 1 = no interrupt pending (normal default condition)
5:4
3:1
0
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參數(shù)描述
SC16C652BIBS,128 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16C652BIBS,151 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16C652BIBS,157 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16C652BIBS-F 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH UART 32B FIFO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16C652BIBS-S 功能描述:UART 接口集成電路 16CB 2.5V-5V 2CH UART 32B FIFO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
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