Chapter 4 programming pb-tim2 user’s manual – Kontron PB-TIM2 User Manual
Page 22
Chapter 4 Programming
PB-TIM2 User’s Manual
4.2 Register Allocation
4.2.1 Channel Control Register
Write Only Register
Channel
0
1
2
Address
$01
$21
$41
Bit
7
6
5
4
3
2
1
0
Function
Load
Enable
Clear
After Reset
0
0
0
0
0
0
0
0
Where •
Clear :
Clears the timer (all 0’s) and the output (Toggle flip-flop) when this bit is set
to
1
• Enable :
Enable timer operation (i.e. starts the timer or single measurement when this
bit
is set to 1
• Load :
Loads the timer with the Comparator/Preset register value when set to 1
4.2.2 Channel Mode Register
Write Only Register
Channel
0
1
2
Address
$05
$25
$45
Bit
7
6
5
4
3
2
1
0
Function
Output
Reload
Mode 1
Mode 0
B IN 1
B IN 0
A IN 1
A IN 0
After Reset
0
0
0
0
0
0
0
0
Where • A IN 0 and 1 :
Defines the input mode
A IN 1
A IN 0
Mode
0
0
Rising Edge
0
1
Falling Edge
1
x
Both Edges
• B IN 0 :
Defines input (B) level or edge
0 active high - rising edge
1 active low - falling edge
• B IN 1 :
Defines input (B) level or edge
0 level
1 edge operation
Page 4-2
© 1996 PEP Modular Computers
July 30, 1997