– 168 –
CXD3068Q
§ 5-15. Writing to Coefficient RAM
The coefficient RAM can be rewritten by $34. All coefficients have default values in the built-in ROM, and
transfer from the ROM to the RAM is completed approximately 40µs (when MCK = 128Fs) after the XRST pin
rises. (The coefficient RAM cannot be rewritten during this period.)
After that, the characteristics of each built-in filter can be finely adjusted by rewriting the data for each address
of the coefficient RAM.
The coefficient rewrite command is comprised of 24 bits, with D14 to D8 of $34 as the address (D15 = 0) and
D7 to D0 as data. Coefficient rewriting is completed 11.3µs (when MCK = 128Fs) after the command is
received. When rewriting multiple coefficients, be sure to wait 11.3µs (when MCK = 128Fs) before sending the
next rewrite command.
§ 5-16. PWM Output
FCS, TRK and SLD PWM format outputs are described below.
In particular, FCS and TRK use a double oversampling noise shaper.
Timing Chart 5-20 and Fig. 5-21 show examples of output waveforms and drive circuits.
t
MCK
=
≈
180ns
Timing Chart 5-20.
Fig. 5-21. Drive Circuit
1
5.6448MHz
Summary of Contents for PV420S
Page 1: ...SERVICE MANUAL PV420S WWW BBK RU ...
Page 72: ... 69 CXD3068Q Block Diagram ...
Page 73: ... 70 CXD3068Q Pin Configuration ...
Page 122: ... 119 CXD3068Q Timing Chart 1 3 ...
Page 123: ... 120 CXD3068Q Timing Chart 1 4 ...
Page 124: ... 121 CXD3068Q Timing Chart 1 5 ...
Page 129: ... 126 CXD3068Q Timing Chart 2 1 ...
Page 130: ... 127 CXD3068Q Block Diagram 2 2 ...
Page 131: ... 128 CXD3068Q Timing Chart 2 3 ...
Page 134: ... 131 CXD3068Q Timing Chart 2 6 ...
Page 138: ... 135 CXD3068Q VCO C Mode Fig 3 3 Access Flow Chart Using VCO Control ...
Page 140: ... 137 CXD3068Q Block Diagram 4 1 ...
Page 143: ... 140 CXD3068Q Timing Chart 4 4 ...
Page 147: ... 144 CXD3068Q Fig 4 6 a Auto Focus Flow Chart Fig 4 6 b Auto Focus Timing Chart ...
Page 148: ... 145 CXD3068Q Fig 4 7 a 1 Track Jump Flow Chart Fig 4 7 b 1 Track Jump Timing Chart ...
Page 149: ... 146 CXD3068Q Fig 4 8 a 10 Track Jump Flow Chart Fig 4 8 b 10 Track Jump Timing Chart ...
Page 150: ... 147 CXD3068Q Fig 4 9 a 2N Track Jump Flow Chart Fig 4 9 b 2N Track Jump Timing Chart ...
Page 151: ... 148 CXD3068Q Fig 4 10 a Fine Search Flow Chart Fig 4 10 b Fine Search Timing Chart ...
Page 152: ... 149 CXD3068Q Fig 4 11 a M Track Move Flow Chart Fig 4 11 b M Track Move Timing Chart ...
Page 157: ... 154 CXD3068Q Fig 4 15 CD TEXT Data Timing Chart ...
Page 162: ... 159 CXD3068Q Fig 5 3a Fig 5 3b ...
Page 196: ... 193 CXD3068Q Description of Data Readout ...
Page 200: ... 197 CXD3068Q ...
Page 201: ... 198 CXD3068Q ...
Page 202: ... 199 CXD3068Q ...
Page 207: ... 204 CXD3068Q Package Outline Unit mm ...
Page 208: ...This data sheet has been made from recycled paper to help protect the environment 205 ...
