Driver Development Kit (DDK)

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M Series Counter TC interruption and Gi_Status_1 register

Hello everyone
 
Q1: About the G0_Status1 register
Everytime I get TC interruption from a board, checking the G0_Status_1 register.
And I could find bit 12 is always TRUE and it is even when TC doesn't hit to 0.
The 660x RLP Manual says the bit 15 is G0 Interrupt and bit 3 is TC interrupt and
I'm sure it working correct. But I don't know why the bit 12 is always TRUE.
Could anyone tell me what the bit 12 is?
 
Q2: About TC interruption
Also, I could make the TC interrupt count down direction and when it hits to 0.
If there is some configuration the direction inverted, I would like to know how to
do it. I mean it is something like that the Counter0 counts up and when it hits to
specified value, TC interrupt occurs.
Thanks in advance
Ash
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