xr17l152im Exar Corporation, xr17l152im Datasheet - Page 12

• Manufacturer Part Number: xr17l152im
• Description: 3.3v Pci Bus Dual Uart
• Manufacturer: Exar Corporation

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DISCONTINUED
Registers INT3, INT2 and INT1 [32:8]
Twenty four bit encoded interrupt indicator. Each channel’s interrupt is encoded into 3 bits for receive, transmit,
and status. Bit [10:8] represent channel 0 and channel 1 with bits [13:11]. The 3 bit encoding and their priority
order are shown below in
within channel 0 only.
.
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F
P
IGURE
RIORITY
N+2
Bit
x
1
2
3
4
5
6
7
Rsvd
4. T
N+1
Bit
B
HE
Bit
N
IT
[
0
0
0
0
1
1
1
1
N
G
INT3 Register
+2]
N+2
Bit
LOBAL
Rsvd
N+1
Bit
B
IT
I
T
[
NTERRUPT
Bit
0
0
1
1
0
0
1
1
N
N
ABLE
+1]
Table
The INT0 register provides status for each channel
N+2
Bit
5: UART C
B it-7
R s vd
5. The Timer and MPIO interrupts are for the device and therefore they exist
Rsvd
N+1
B
Bit
IT
0
1
0
1
0
1
0
1
R
[
Ind ividua l U A R T C han nel Interru pt S tatu s
N
EGISTER
Bit
N
B it-6
R s vd R s vd R s vd
]
N+2
None
RXRDY and RX Line Status (logic OR of LSR[4:1])
RXRDY Time-out
TXRDY, THR or TSR (auto RS485 mode) empty
MSR, RTS/CTS or DTR/DSR delta or Xoff/Xon det. or special char. detected
Reserved.
MPIO pin(s). Available only in channel 0, reserved in channel 1.
TIMER Time-out. Available only in channel 0, reserved channel 1.
Bit
HANNEL
B it-5 B it-4
Rsvd
, INT0, INT1, INT2
INT0, INT1, INT2 and INT3
N+1
Bit
Interrupt Registers,
INT2 Register
IN T0 R eg iste r
Bit
N
[1:0] I
N+2
Bit
12
B it-3
R s vd R s vd C h-1 C h-0
NTERRUPT
Rsvd
N+1
Bit
B it-2
Bit
N
AND
N+2
I
Bit
NTERRUPT
S
B it-1
INT3
OURCE
Rsvd
Rsvd
N+1
Bit-7
Bit
Rsvd Rsvd
Bit-6
B it-0
Bit
N
E
S
NCODING
OURCE
Bit-5
N+2
Bit
Channel-1
INT0 Register
3.3V PCI BUS DUAL UART
Rsvd
Bit-4
N+1
INT1 Register
Bit
(
S
)
Rsvd Rsvd Ch-1 Ch-0
Bit-3
Bit
N
N+2
Bit-2
Bit
Channel-0
N+1
Bit-1
Bit
XR17L152
Bit-0
Bit
N
REV. 1.1.0