參數資料
型號: XR17C154CV
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: Burner
中文描述: 4 CHANNEL(S), 6.25M bps, SERIAL COMM CONTROLLER, PQFP144
封裝: 20 X 20 MM, 1.40 MM HEIGHT, TQFP-144
文件頁數: 13/62頁
文件大小: 721K
代理商: XR17C154CV
á
REV. 1.3.0
XR17C154
5V PCI BUS QUAD UART
13
.
F
IGURE
4. T
HE
G
LOBAL
I
NTERRUPT
R
EGISTER
, INT0, INT1, INT2
AND
INT3
T
ABLE
5: UART C
HANNEL
[3:0] I
NTERRUPT
S
OURCE
E
NCODING
P
RIORITY
B
IT
[
N
+2]
B
IT
[
N
+1]
B
IT
[
N
]
I
NTERRUPT
S
OURCE
(
S
)
x
0
0
0
None
1
0
0
1
RXRDY and RX Line Status (logic OR of LSR[4:1])
2
0
1
0
RXRDY Time-out
3
0
1
1
TXRDY, THR or TSR (auto RS485 mode) empty
4
1
0
0
MSR, RTS/CTS or DTR/DSR delta or Xoff/Xon det. or special char. detected
5
1
0
1
Reserved.
6
1
1
0
MPIO pin(s). Available only within channel 0, reserved in other channels.
7
1
1
1
TIMER Time-out. Available only within channel 0, reserved in other chan-
nels.
T
ABLE
6: UART C
HANNEL
[3:0] I
NTERRUPT
C
LEARING
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
Rsvd
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
Rsvd
Rsvd
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