REV. 1.3.2 14 . FIGURE 4. T
參數(shù)資料
型號(hào)： XR17C154CV-0A-EVB
廠商： Exar Corporation
文件頁(yè)數(shù)： 6/62頁(yè)
文件大小： 0K
描述： EVAL BOARD FOR XR17C154-A 144TQF
標(biāo)準(zhǔn)包裝： 1
系列： *
XR17C154
xr
5V PCI BUS QUAD UART
REV. 1.3.2
14
.
FIGURE 4. THE GLOBAL INTERRUPT REGISTER, INT0, INT1, INT2 AND INT3
TABLE 5: UART CHANNEL [3:0] INTERRUPT SOURCE ENCODING
PRIORITY
BIT[N+2]
BIT[N+1]
BIT[N]
INTERRUPT SOURCE(S)
x
0
None
1
0
1
RXRDY and RX Line Status (logic OR of LSR[4:1])
2
0
1
0
RXRDY Time-out
3
0
1
TXRDY, THR or TSR (auto RS485 mode) empty
4
1
0
MSR, RTS/CTS or DTR/DSR delta or Xoff/Xon det. or special char. detected
5
1
0
1
Reserved.
6
1
0
MPIO pin(s). Available only within channel 0, reserved in other channels.
7
1
TIMER Time-out. Available only within channel 0, reserved in other chan-
nels.
TABLE 6: UART CHANNEL [3:0] INTERRUPT CLEARING
RXRDY is cleared by reading data in the RX FIFO until it falls below the trigger level.
RXRDY Time-out is cleared by reading data until the RX FIFO is empty.
RX Line Status interrupt clears after reading the LSR register.
TXRDY interrupt clears after reading ISR register that is in the UART channel register set.
Modem Status Register interrupt clears after reading MSR register that is in the UART channel register set.
RTS/CTS or DTR/DSR delta interrupt clears after reading MSR register that is in the UART channel register set.
Xoff/Xon interrupt clears after reading the ISR register that is in the UART channel register set.
Special character detect interrupt is cleared by a read to ISR or after the next character is received.
TIMER Time-out interrupt clears after reading the TIMERCNTL register that is in the Device Configuration register set.
MPIO interrupt clears after reading the MPIOLVL register that is in the Device Configuration register set.
Channel-3
Channel-2
Channel-1
Channel-0
INT2 Register
INT1 Register
INT3 Register
INT0 Register
Interrupt Registers,
INT0, INT1, INT2 and INT3
Bit-0
Bit-1
Bit-2
Bit-3
Bit-7
Bit-4
Bit-5
Bit-6
Ch-3 Ch-2 Ch-1 Ch-0
Bit
N+1
Bit
N+2
Bit
N
Bit
N+1
Bit
N+2
Bit
N
Bit
N+1
Bit
N+2
Bit
N
Bit
N+1
Bit
N+2
Bit
N
Bit
N+1
Bit
N+2
Bit
N
Bit
N+1
Bit
N+2
Bit
N
Bit
N+1
Bit
N+2
Bit
N
Bit
N+1
Bit
N+2
Bit
N
Rsvd Rsvd Rsvd Rsvd
Rsvd
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XR17C154CVTR-F 制造商:Exar Corporation 功能描述:UART 4-CH 64Byte FIFO 5V 144-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR17C154CVTR-F
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