xr16m698 Exar Corporation, xr16m698 Datasheet - Page 26

• Manufacturer Part Number: xr16m698
• Description: 1.62v To 3.63v High Performance Octal Uart With 32-byte Fifo
• Manufacturer: Exar Corporation

XR16M698
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
Each bit gives an indication of the channel that has requested for service. For example, bit-0 represents
channel 0 and bit-7 indicates channel 7. Logic one indicates the channel N [7:0] has called for service. The
interrupt bit clears after reading the appropriate register of the interrupting UART channel register (ISR, LSR
and MSR).
INT3, INT2 and INT1 provide a 24-bit (3 bits per channel) encoded interrupt indicator.
encoding and their priority order. The 16-bit Timer time-out interrupt will show up only as a channel 0 interrupt.
For other channels, interrupt 7 is reserved.
.
F
3.1.1.1
3.1.1.2
IGURE
Bit
2
Channel-7
13. T
Bit
1
SEE”INTERRUPT CLEARING:” ON PAGE 35.
Bit
0
HE
INT0 Channel Interrupt Indicator
INT1, INT2 and INT3 Interrupt Source Locator
INT3 Register
Bit
G
2
Channel-6
LOBAL
Bit
1
Bit
0
I
NTERRUPT
Bit
2
Channel-5
Ch-7
Bit-7
Bit
1
R
Bit
Ch-6
Bit-6
0
Individual UART Channel Interrupt Status
EGISTERS
Bit
2
Channel-4
Ch-5
Bit-5
INT0, INT1, INT2 and INT3
Bit
1
Interrupt Registers,
, INT0, INT1, INT2
INT2 Register
INT0 Register
Bit
Ch-4
Bit-4
0
Bit
26
2
Channel-3
Ch-3
Bit-3
Bit
1
for interrupt clearing details.
Bit-2
Ch-2
Bit
0
Bit
2
AND
Ch-1
Channel-2
Bit-1
Ch-7
Bit-7
Bit
1
INT3
Ch-6
Bit-6
Ch-0
Bit-0
Bit
0
Ch-5 Ch-4
Bit-5
Bit
2
Channel-1
INT0 Register
Bit-4
INT1 Register
Bit
1
Table 10
Ch-3 Ch-2
Bit-3
Bit
0
Bit-2
Bit
2
Channel-0
Ch-1 Ch-0
Bit-1
Bit
shows the 3 bit
1
Bit-0
Bit
0
REV. 1.0.0