REV. 1.0.3 HIGH PERFORMANCE DUAL PCI EXPRESS UART INT0 [7:0] Channel Interrupt Indicator Each bit gives an indication of the channe" />
參數(shù)資料
型號: XR17V352IB-0A-EVB
廠商: Exar Corporation
文件頁數(shù): 9/64頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR XR17V352 113BGA
產品培訓模塊: PCIe UARTs
標準包裝: 1
主要目的: 接口,UART
已用 IC / 零件: XR17V352
已供物品:
其它名稱: 1016-1610
1016-1610-ND
1016-1645
XR17V352IB-0A-EVB-ND
XR17V352
17
REV. 1.0.3
HIGH PERFORMANCE DUAL PCI EXPRESS UART
INT0 [7:0] Channel Interrupt Indicator
Each bit gives an indication of the channel that has requested for service. Bit [0] represents channel 0 and
bit [1] indicates channel 1. All other bits are reserved. Logic 1 indicates the channel N [1:0] has called for
service. The interrupt bit clears after reading the appropriate register of the interrupting channel register, see
Interrupt Clearing section.
The INT0 register provides individual status for each channel
INT0 Register
Individual UART Channel Interrupt Status
Bit-3 Bit-2 Bit-1 Bit-0
Bit-4
Bit-5
Bit-6
Bit-7
0
Ch-1 Ch-0
INT3, INT2 and INT1 [31:8] 3-bit Channel Interrupt Encoding
Each channel’s interrupt is encoded into 3 bits for receive, transmit, and status. Bits [10:8] represent channel 0
and go up to channel 1 with bits [13:11]. The 3-bit encoding and their priority order are shown below in Table 7.
The wake-up interrupt, timer/counter interrupt and MPIO interrupt are only reported in channel 0 of INT1
(bits[10:8]). These interrupts are not reported in any other location.
FIGURE 4. THE GLOBAL INTERRUPT REGISTER, INT0, INT1, INT2 AND INT3
Reserved
Channel-1
Channel-0
INT2 Register
INT1 Register
INT3 Register
INT0 Register
Interrupt Registers,
INT0, INT1, INT2 and INT3
Ch-0
Ch-1
0
00
0
Bit-3 Bit-2 Bit-1 Bit-0
Bit
N+1
Bit
N+2
Bit
N
Bit
N+1
Bit
N+2
Bit
N
0
00
0
00
0
00
0
00
0
00
0
00
Bit-7 Bit-6 Bit-5 Bit-4
Reserved
TABLE 7: UART CHANNEL [1:0] INTERRUPT SOURCE ENCODING
PRIORITY
BIT[N+2]
BIT[N+1]
BIT[N]
INTERRUPT SOURCE(S)
x
0
None or wake-up indicator (wake-up indicator is reported in channel 0 only)
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). Reported in channel 0 only.
7
1
Timer/Counter. Reported in channel 0 only.
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