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LC72146 View Datasheet(PDF) - SANYO -> Panasonic

Part Name
Description
Manufacturer
LC72146 Datasheet PDF : 22 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
LC72146, 72146M, 72146V
Continued from preceding page.
No.
Name
Function
DO and I/O-5 output control data
Bits ULD, DT0, DT1, IL0 and IL1 control the mode of outputs DO and I/O-5 as shown in Table 6 and Table 7.
Table 6 DO and I/O-5 output flag selection
Related bits
ULD
DT1
DT0
DO
0
0
0
Unlock flag
0
0
1
Open
0
1
0
End-UC flag*1.
0
1
1
IN. See table 7.
1
0
0
Open
1
0
1
Open
1
1
0
End-UC flag
1
1
1
IN. See table 7.
I/O-5
OUT5 flag*2.
Unlock flag*2.
Note: *1. End-UC flags that general-purpose counter operation has finished.
*2. Applicable only if I/O-5 is set to be an output port.
(4)
ULD, DT0,
DT1, IL0, IL1
DO
OUT5, I/O-1, I/O-2,
I/O-5
Start
Finish
(I-1 change)
CE : Hi
Table 7 IN state selection
Figure 3 DO output state
A02691
IL1
IL0
IN state
0
0
Open
0
1
I-1 input
1
0
I-2 input
1
1
DO goes low when I1 changes.
Note: 1. If I/O-1 or I/O-2 is set to be an output port, IN becomes open.
2. DO does not go low when the crystal oscillator has stopped.
[When reference frequencies are as these: R3 = R2 = R1 = 1; R0 = 0]
(5)
*
Don’t care.
Counter control
Bits CTS0 and CTS1 select the counter input as shown in Table 8.
Table 8 Counter input and measurement mode selection
CTS1 CTS0
Input
Measurement
mode
1
×
HCTR Frequency
0
1
LCTR Frequency
0
0
LCTR Period
Note: × = don’t care
CTS0,
CTS1, CTE,
GT0, GT1
Bit CTE starts the counter when 1, and resets the counter, when 0.
Bits GT0 and GT1 select the measurement time in frequency measurement mode or the number of
periods to count in period measurement mode as shown in Table 9.
(6)
Table 9 Measurement duration selection
GT1
GT0
0
0
0
1
1
0
1
1
Frequency measurement
Measurement
duration (ms)
Wait time (ms)
4
3 to 4
8
32
7 to 8
64
Period measurement
Cycles
1
2
CTP, CTC
When CTE is 0 the input is pulled down, and when CTP is 1 it is not. (Wait time: 1 to 2 ms.)
CTP must be set to 1 at least 4 ms before CTE is set to 1.
The input sensitivity can be reduced by setting CTC to 1. (Sensitivity: 10 to 30 mV rms)
H/I-6, L/I-7
Continued on next page.
No. 4922-11/22
 

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