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參數(shù)資料
| 型號： | XR17C152CM-0A-EVB |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 30/62頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD FOR XR17C152 100TQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | * |
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XR17C152
á
5V PCI BUS DUAL UART
REV. 1.2.0
36
Interrupt Generation:
LSR is by any of the LSR bits 1, 2, 3 and 4.
RXRDY is by RX trigger level.
RXRDY Time-out is by the a 4-char plus 12 bits delay timer if the RX FIFO level is less than the RX trigger
level.
TXRDY is by LSR bit-5 (or bit-6 in auto RS485 control).
MSR is by any of the MSR bits, 0, 1, 2 and 3.
Receive Xon/Xoff/Special character is by detection of a Xon, Xoff or Special character.
CTS#/DSR# is by a change of state on the input pin (from LOW to HIGH) with auto flow control enabled,
EFR bit-7, and depending on selection of MCR bit-2.
RTS#/DTR# is when its receiver changes the state of the output pin (from LOW to HIGH) during auto RTS/
DTR flow control enabled by EFR bit-6 and selection of MCR bit-2.
Wake-up Indicator: when the UART comes out of sleep mode.
Interrupt Clearing:
LSR interrupt is cleared by a read to the LSR register.
RXRDY is cleared by reading data until FIFO falls below the trigger level.
RXRDY Time-out is cleared by reading data until the RX FIFO is empty.
TXRDY interrupt is cleared by a read to the ISR register.
MSR interrupt is cleared by a read to the MSR register.
Xon or Xoff character interrupt is cleared by a read to ISR register.
Special character interrupt is cleared by a read to ISR register or after the next character is received.
RTS#/DTR# and CTS#/DSR# status change interrupts are cleared by a read to the MSR register.
Wake-up Indicator is cleared by a read to the INT0 register.
]
ISR[0]: Interrupt 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 (default condition).
ISR[3:1]: Interrupt Status
These bits indicate the source for a pending interrupt at interrupt priority levels 1, 2, 3 and 4 (See Interrupt
Source Table 13).
TABLE 13: INTERRUPT SOURCE AND PRIORITY LEVEL
PRIORITY
ISR REGISTER STATUS BITS
SOURCE OF THE INTERRUPT
LEVEL
BIT-5
BIT-4
BIT-3
BIT-2
BIT-1
BIT-0
1
000
1
0
LSR (Receiver Line Status Register)
2
000
1
0
RXRDY (Received Data Ready)
3
001
1
0
RXRDY (Receive Data Time-out)
4
000
0
1
0
TXRDY (Transmitter Holding Register Empty)
5
000
0
MSR (Modem Status Register)
6
010
0
RXRDY (Received Xon/Xoff or Special character)
7
100
0
CTS#/DSR#, RTS#/DTR# change of state
X
000
0
1
None (default)
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| XR17C152CM-F | 功能描述:UART 接口集成電路 UART 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 |
| XR17C152IM | 制造商:EXAR 制造商全稱:EXAR 功能描述:5V PCI BUS DUAL UART |
| XR17C152IM-F | 功能描述:UART 接口集成電路 UART 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 |
| XR17C154 | 制造商:EXAR 制造商全稱:EXAR 功能描述:5V PCI BUS QUAD UART |
| XR17C154_05 | 制造商:EXAR 制造商全稱:EXAR 功能描述:5V PCI BUS QUAD UART |
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