The 7 series MMCM adds spread spectrum clock generation using both center spread and down spread.
Figure 1: Center-Spread Modulation
Figure 2: Down-spread Modulation
入力周波数 [MHz] | M | 入力周波数調整 (FIN_SS) | |
SS_MODE (CENTER_HIGH) | 25 < FIN < 35 | M=28 | FIN_SS = FIN * 56 / 55 |
35 < FIN < 50 | M=21 | FIN_SS = FIN * 42 / 41 | |
M=22 | FIN_SS = FIN * 44 / 43 | ||
50 < FIN < 75 | M=28 | FIN_SS = FIN * 56 / 55 | |
75 < FIN < 150 | M=21 | FIN_SS = FIN * 42 / 41 | |
M=22 | FIN_SS = FIN * 44 / 43 | ||
SS_MODE (CENTER_LOW) | 25 < FIN < 35 | M=56 | FIN_SS = FIN * 112 / 111 |
35 < FIN < 50 | M=42 | FIN_SS = FIN * 84 / 83 | |
M=44 | FIN_SS = FIN * 88 / 87 | ||
50 < FIN < 75 | M=56 | FIN_SS = FIN * 112 / 111 | |
75 < FIN < 150 | M=42 | FIN_SS = FIN * 84 / 83 | |
M=44 | FIN_SS = FIN * 88 / 87 | ||
SS_MODE (DOWN_HIGH) | 25 < FIN < 35 | M=28 | FIN_SS = FIN |
35 < FIN < 50 | M=21、22 | FIN_SS = FIN | |
50 < FIN < 75 | M=28 | FIN_SS = FIN | |
75 < FIN < 100 | M=21、22 | FIN_SS = FIN | |
100 < FIN < 150 | M=21、22 | FIN_SS = FIN | |
SS_MODE (DOWN_LOW) | 25 < FIN < 35 | M=56 | FIN_SS = FIN |
35 < FIN < 50 | M=42、44 | FIN_SS = FIN | |
50 < FIN < 75 | M=56 | FIN_SS = FIN | |
75 < FIN < 100 | M=42、44 | FIN_SS = FIN | |
100 < FIN < 150 | M=42、44 | FIN_SS = FIN |
Answer Number | アンサータイトル | 問題の発生したバージョン | 修正バージョン |
---|---|---|---|
47351 | 7 Series MMCM Spread Spectrum support details | N/A | N/A |