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LMK04826 / about Cascaded 0-delay Dual Loop Mode

Toshiyuki
Mastermind 7075 points
Other Parts Discussed in Thread: LMK04826

Hi,

Regarding Dual Loop Mode setting for LMK04826,

In Dual Loop Mode as shown the datasheet Figure15, we have confirmed that PLL2 has achieved lock.

However, in Cascaded 0-delay Dual Loop Mode as shown the datasheet Figure16, the PLL2 couldn't be lock.

The evaluation condition is as follows, and I have attached the dump list.

・CLKin0 = 122.88MHz

・OSCin = 30.72MHz

・Phase Detect(PLL1) = 7.68MHz

・Phase Detect(PLL2) = 30.72MHz

・VCO = 1966.08MHz

・DCLKout0 = 122.88MHz

・DCLKout6 = 983.04MHz

・Address 0x13F = 0x11

・Address 0x140 = 0x00

・Address 0x147 = 0x0A

・Address 0x138 = 0x00

Please let me know if the settings are wrong.

Best Regards,

Kato

Fullscreen Cascaded 0delay mode setting.txt Download 
  0x0000 0x80
  0x0000 0x10
  0x0002 0x00
  0x0100 0x30
  0x0101 0xAA
  0x0103 0x01
  0x0104 0x2A
  0x0105 0x00
  0x0106 0x70
  0x0107 0x11
  0x0108 0x30
  0x0109 0xAA
  0x010B 0x01
  0x010C 0x00
  0x010D 0x00
  0x010E 0xF8
  0x010F 0x00
  0x0110 0x22
  0x0111 0xAA
  0x0113 0x01
  0x0114 0x2F
  0x0115 0x00
  0x0116 0x70
  0x0117 0x55
  0x0118 0x22
  0x0119 0xAA
  0x011B 0x01
  0x011C 0x2F
  0x011D 0x00
  0x011E 0x70
  0x011F 0x55
  0x0120 0x22
  0x0121 0xAA
  0x0123 0x01
  0x0124 0x2F
  0x0125 0x00
  0x0126 0x70
  0x0127 0x55
  0x0128 0x30
  0x0129 0xAA
  0x012B 0x01
  0x012C 0x00
  0x012D 0x00
  0x012E 0xF0
  0x012F 0x01
  0x0130 0x22
  0x0131 0xAA
  0x0133 0x01
  0x0134 0x2F
  0x0135 0x00
  0x0136 0x70
  0x0137 0x55
  0x0138 0x00
  0x0139 0x00
  0x013A 0x02
  0x013B 0x00
  0x013C 0x00
  0x013D 0x11
  0x013E 0x00
  0x013F 0x00
  0x0140 0x00
  0x0141 0xFF
  0x0142 0x00
  0x0143 0x91
  0x0144 0x00
  0x0145 0x7F
  0x0146 0x02
  0x0147 0x0A
  0x0148 0x02
  0x0149 0x42
  0x014A 0x00
  0x014B 0x0E
  0x014C 0x36
  0x014D 0x00
  0x014E 0xC0
  0x014F 0x7F
  0x0150 0x03
  0x0151 0x02
  0x0152 0x00
  0x0153 0x00
  0x0154 0x10
  0x0155 0x00
  0x0156 0x10
  0x0157 0x00
  0x0158 0x96
  0x0159 0x00
  0x015A 0x04
  0x015B 0xD4
  0x015C 0x20
  0x015D 0x00
  0x015E 0x00
  0x015F 0x1E
  0x0160 0x00
  0x0161 0x01
  0x0162 0x40
  0x0163 0x00
  0x0164 0x00
  0x0165 0x0A
  0x017C 0x18
  0x017D 0x77
  0x0166 0x00
  0x0167 0x00
  0x0168 0x20
  0x0169 0x59
  0x016A 0x20
  0x016B 0x00
  0x016C 0x00
  0x016D 0x00
  0x016E 0x3E
  0x0173 0x00
  0x1FFD 0x00
  0x1FFE 0x00
  0x1FFF 0x53
  0x0143 0xB1
  0x0143 0x91
  0x0144 0xFF
  0x0143 0x11
  0x0143 0x10
  0x0139 0x02
  0x0139 0x03