UNO-2050E User Manual
20
Counter Interrupt Flag
The interrupt flag bit is a flag indicating the status of an interrupt. It is a
readable/writable bit. To find the status of the interrupt, you have to read
the bit value; to clear the interrupt, you have to write “1” to this bit. This
bit must first be cleared to service the next coming interrupt. Besides, you
can choose if counter 0 or counter 1 generate interrupt signal by configur-
ing “CTR0IntSet” and “CTR1IntSet” control bit.
Cascaded 32-bit Counter
You can also cascade counter 0 and counter 1 together as one 32-bit
counter/timer, and it’s configured by the control bit - CTR32Set.
2.7 LAN: Ethernet Connector
The UNO-2050E is equipped with two Realtek RTL8139DL Ethernet
LAN controller that is fully compliant with IEEE 802.3u 10/100Base-T
CSMA/CD standards. The Ethernet port provides a standard RJ-45 jack
on board, and LED indicators on the front side to show its Link (Yellow
LED) and Active (Green LED) status. Please refer to A.4 for its pin
assignments.
Table 2.14: Counter Interrupt Flag Control Bit
CTR0F, CTR1F
Counter Interrupt Status
Read
0
No interrupt
1
Interrupt occur
Write
0
Don’t care
1
Clear interrupt
CTR0IntSet, CTR1IntSet
Counter Interrupt Control
0
Disable (Default)
1
Enable
Table 2.15: 32-bit Counter Control Bit
0
Disable (Default)
1
Cascade counter 0 and counter 1 into one 32-bit counter