23
8Bit Single Chip Microcontroller
DMC73C168
5) IF COUNTER REGISTER
PF NAME : IFCCTL
R/W
: IF CONTROL REGISTER
BIT 7
BIT 6
FMIF
BIT 5
AMIF
BIT 4
BIT 3
TP3
BIT 2
TP2
BIT 1
TP1
BIT 0
TP0
P22
READ READY
WRITE START
TSTIF
>0116
RESET VALUE
O
O
O
O
O
O
O
O
READ :
READY : 0 = INACTIVE OR COMPLETE COUNTER
1 = INCOMPLETE OR ACTIVE COUNTER
WRITE :
IF FREQ. COUNTING PERIOD SELECT (TP0, TP1, TP2, TP3)
TP3
0
TP2
0
TP1
0
TP0
0
COUNT TIME
X
0
0
0
1
1 ms
0
0
1
0
2 ms
0
0
1
1
3 ms
0
1
0
0
4 ms
0
1
0
1
5 ms
0
1
1
0
6 ms
0
1
1
1
7 ms
1
0
0
0
8 ms
1
0
0
1
9 ms
1
0
1
0
10 ms
11 ms
12 ms
13 ms
14 ms
15 ms
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
TSTIF
: IF COUNTER TEST BIT
(ATTENTION : SHOULD BE SET TO "0" IN NORMAL OPERATION)
0 = NORMAL ACTIVE MODE
1 = TEST MODE
AMIF, FMIF : IF COUNTER INPUT SELECT
FMIF
AMIF COUNTING INPUT
0
0
1
1
0
1
0
1
NOT INPUT
AMIF
FMIF
X
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