NEC V850ES/F 3-L Series User Manual page 320

Chapter 10
Rewrite during
timer operation
320
If the edge specification for the capture operation shall be changed, while the
timer remains in operation (TAAnCTL0.TAAnCE = 1), only a single bit of the
edge specification bits TAAnIOC1.TAAnIS[k:i] of a dedicated capture input may
be changed with a single write operation.
Consequently proceed as follows (TIAAn0 is used exemplarily):
• Change from rising edge to falling edge:
– current status is TAAnIOC1.TAAnIS[1:0] = 01
– set TAAnIOC1.TAAnIS[1:0] = 00
– set TAAnIOC1.TAAnIS[1:0] = 10
• Change from falling edge to rising edge:
– current status is TAAnIOC1.TAAnIS[1:0] = 10
– set TAAnIOC1.TAAnIS[1:0] = 00
– set TAAnIOC1.TAAnIS[1:0] = 01
• Change from rising or falling edge to both edges:
– current status is TAAnIOC1.TAAnIS[1:0] = 01
edge"
– set TAAnIOC1.TAAnIS[1:0] = 11
User's Manual U18743EE1V2UM00
16-Bit Timer/Event Counter AA
: "rising edge"
B
: specify "no edge"
B
: specify "falling edge"
B
: "falling edge"
B
: specify "no edge"
B
: specify "rising edge"
B
or 10 : "rising" or "falling
B B
: specify "both edges"
B