- 76 -
12-14.DFLINT Timing (INTA#)
(DFL COMP1: An example. Detecting condition: DIFFERENTIAL COUNTER≧COMPARE REGISTER1)
The interrupt request signal(XDFLINT) and STATUS signal are produced and reset at the following timing.
(1) When the DFLINT LATCH TRIGGER TYPE=0 is specified by the DFL COUNTER INITIALIZE Command.
DFL COMPARE
①
10
REGISTER1
DFL COUNTER value 7
8
9
10
9
8
IOR#
XDFLINT and
②
③
④
DFL COMP1 in STATUS3
DFL COMP1 in STATUS3
①: COMPARE REGISTER SET Command causes writing of the interrupt generating counter value.
(in this example, the interrupt generating counter value is set to 10).
②: As the counter value reaches the level specified in ① above, XDFLINT is output.
③: When the counter value is in agreement with the detection condition, accessing the STATUS3 PORT
does not clear XDFLINT output.
④: When the counter value is not meeting the detect condition, reading the STATUS3 PORT clears XDFLINT.
(2) When the DFLINT LATCH TRIGGER TYPE=1 is specified by DFL COUNTER INITIALIZE Command.
DFL COMPARE
①
10
REGISTER1
DFL COUNTER value 7
8
9
10
11
12
13
14
IOR#
XDFLINT and
②
③
DFL COMP1 in STATUS3
DFL COMP1 in STATUS3
①: COMPARE REGISTER SET Command causes writing of the interrupt generating counter value.
②: As the counter value reaches the level specified in ① above, XDFLINT is output.
③: Output of XDFLINT is maintained until the STATUS3 PORT is accessed
(reading the STATUS3 PORT clears XDFLINT output even if the counter value meets the detect condition).
(3) When the DFLINT OUTPUT TYPE=1 (through-output) is specified by DFL COUNTER INITIALIZE Command.
DFL COMPARE
①
10
REGISTER1
DFL COUNTER value 7
8
9
10
11
10
9
8
XDFLINT and
②
③
④
DFL COMP1 in STATUS3
①: COMPARE REGISTER SET Command causes writing of the interrupt generating counter value.
②: As the counter value reaches the level specified in ① above, XDFLINT is output.
③: When the counter value is in agreement with the detect condition, XDFLINT is output.
④: When the counter value is not matching, XDFLINT is cleared without requiring access to the STATUS3
PORT.
Example: When the by-direction independent clock is selected as the count pattern of DIFFERENTIAL COUNTER.
XCWP/XCCWP(Note)
or EA/EB
IOR#
Note: Indicates the STATUS3 read timing.
XDFLINT
Note: When the through
t1
t2
t3
-output is selected.
t1<300ns
t2<300ns
t3<200ns
Note: Time from startup edge in case of XCWP/XCCWP.
Summary of Contents for C-875
Page 98: ... 98 2 M TYPE 3 H TYPE ...