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[D7:D6]Charge2_Ref1..0 [Data Comparator Quick Charge Coefficient]
When to set Data Comparator Quick Charge 2 (h'10[D6]Charge2_en = "1"), this setting is valid. Set the tracking time constant τ
of the data comparator reference voltage (vref). This is valid only if an absolute value of the difference between vref and vi (Data
comparator input voltage) will be greater than the threshold level set by register:h'11[D7:D0]Charge2_Th7..0".
tracking time constant τ: τ = nc' / fbc
nc': Inverse of "(1/nr)+(1/nc)"
nc: Setting value of this register:Charge2_Ref1..0 (Refer to the table below.)
nr: Setting value of this register:[D5:D3]Cmp_Ref2..0
fbc: Internal clock signal frequency depends on Bit Rate Filter register:h'0E [D4:D1]BRF_Bit3..0
[D7]Charge2_Ref1
[D6]Charge2_Ref0
0
0
1
1
See section 6.5.9 about Data Comparator Quick Charge 2.
Notice: The cutoff frequency of Bit Rate Filter is derived from 30.32MHz Reference Clock Frequency.
[D5:D3]Cmp_Ref2..0 [Data Comparator reference Level]
Set the tracking time constant τ under the following conditions.
1. No use of Data Comparator Quick Charge 1 & 2
2. Certain time has spent after starting Data Comparator Quick Charge 1.
3. An absolute value of the difference between vref and vi (Data comparator input voltage) will be less than the threshold level
set by register:h'11[D7:D0]Charge2_Th7..0.
tracking time constant τ: τ = nr / fbc
nr: Setting value of this register:[D5:D3]Cmp_Ref2..0 (Refer to the table below.)
fbc: Internal clock signal frequency depends on Bit Rate Filter register:h'0E [D4:D1]BRF_Bit3..0
[D5]Cmp_Ref2
[D4]Cmp_Ref1
0
0
0
0
1
1
1
1
See section 6.5.9 about Data Comparator Reference Voltage.
Notice: The cutoff frequency of Bit Rate Filter is derived from 30.32MHz Reference Clock Frequency.
[D2:D1] NIR_Frqth1..0 [NIR Filter Frequency Control]
[D1:D0] = b'00: 631 kHz (Initial Value)
[D1:D0] = b'01: 659 kHz
[D1:D0] = b'10: 689 kHz
[D1:D0] = b'11: 712 kHz
[D0] NIR_2L1
When to use NIR filter (h'10[D1]NIR_Fil_en = "1"), set this register "1".
1/nc
0
1/4
1
1/8
0
1/16
1
1/32
[D3]Cmp_Ref0
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
nc
4
8
16
32
1/nr
nr
1/128
128
1/256+1/512
170.7
1/256
256
1/512+1/1024
341.3
1/512
512
1/1024+1/2048
682.7
1/1024
1024
1/2048+1/4096
1365.3
72
TC32306FTG
2015-10-01
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