D63711 NEC, D63711 Datasheet - Page 27

• Manufacturer Part Number: D63711
• Description: Search -----> UPD63711
• Manufacturer: NEC

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(7) 17H command (Disturbance frequency and level setting)
[Functional description]
FRQ[4:0]: Sets the disturbance frequency (5-bit absolute value).
FD[2:0]:
MSB
MSB
FD2
0
The disturbance frequency and disturbance level are calculated using the following expressions.
Frequency (F) =
Level
fs:
FQ:
FD:
Example
Caution Set FD to the greatest value that satisfies H
FD1
0
Sets the disturbance level (3-bit absolute value).
FD0
(H) = FD
Value set in FRQ[4:0]
Value set in FD[2:0]
When 17H register = B5H
B5H = 10110101B
Since FQ = 21,
Since FD = 5, H = 5
17H register = D5H is not possible because FD = 6, H = 6
176.4 kHz = 88.2 kHz
0
2
(FQ + 1)
FRQ4 FRQ3 FRQ2 FRQ1 FRQ0
Command
Parameter
1
0
fs
(FQ + 1)
0
F =
4
(21 + 1)
88.2 kHz = 1.0 kHz
Preliminary Product Information S14470EJ1V1PM00
FD = 101B, FQ = 10101B
(21 + 1) = 110 = 6EH
1
4
1
F
LSB
LSB
1
H
H
127.
FRQ[4:0]
FD[2:0]
(21+1) = 132, and H then exceeds 127.
Disturbance Frequency Setting
Disturbance Level Setting
PD63711
27