Epson RX8111CE - Page 47

RX8111CE
Page − 43
ETM61E-01
5) ET1, ET0 bit
These bits select chattering filter period of input from EVIN.
Table 55 ET bit selection
ET1
( bit 6 )
ET0
( bit 5 )
cycle
When EVIN chattering filter function is used, correct data of sub
seconds is not stored in following register bits.
0
0
No chattering filter. *1
All sub seconds data are valid.
0
1
3.9 ms (256 Hz)
1 / 1024 s Bit 0 of 20h.
1
0
15.6 ms(64 Hz)
1 / 1024 s Bit0,1 of 20h.
1 / 256 s Bit 0 of 21h.
1 / 256 s Bit 0 of 40h, 50h, 60h, 70h, 48h, 58h, 68h, 78h.
1
1
125 ms (8 Hz)
1 / 1024 s Bit0, 1, 2, 3, of 20h.
1 / 256 s Bit0 of 21h
1 / 256 s Bit 0, 1, 2, 3 of 40h, 50h, 60h, 70f, 48h, 58h, 68h, 78h.
No chattering filter. EVIN detection is done with approximate 1 s.
Figure 32 EVIN chattering prevention function
6) PDN,PU1,PU0 bit (Pull Down Select, Pull Up Select)
These registers controls EVIN pin input internal Pull-up/Pull-down resistor value.
Pull-up resistor is connected to V
OUT
, Pull-down resistor to GND.
Table 56 PDN,PU register (Pull Down Select, Pull Up Select)
Condition
PDN
PU1
RU0
Resistor value, status
No connection
0
0
0
Hi-Z
Pull-up
0
0
1
500 k
0
1
0
1 M
0
1
1
10 M
Pull-down
1
0
0
500 k
No connection
1
1
0
Don’t select these combinations.
EVIN changed to Hi-Z.
1
0
1
1
1
1
7) OVW bit (Over Write)
This register controls time stamp update.
Table 57 OVW bit (Over Write)
OVW
Data
Description
Write
0
Time stamp records 8 times, then no more time stamp update.
Pointer moves from pointer(0,0,0) → pointer(0,0,1) - - - →
pointer(1,1,1) and stops
1
Time stamp records more than 8 times continuously.
pointer(0,0,0) → pointer(0,0,1) - - - → pointer(1,1,1) → pointer(0,0,0) - -
→
3.9ms)