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SC2000 数据表(PDF) 32 Page - NXP Semiconductors |
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SC2000 数据表(HTML) 32 Page - NXP Semiconductors |
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32 / 44 page ![]() 2000 Sep 07 32 Philips Semiconductors Preliminary specification Universal Timeslot Interchange SC2000 Figure 10. CLK_IN, SYNC_IN — SCbus Mode (CLK_IN Divider ≥4) Table 10. CLK_IN, SYNC_IN — SCbus Mode (CLK_IN Divider ≥ 4) Symbol Parameter Min Typ Max Unit t1 CLK_IN period 122 ns t2 CLK_IN high time 61 ns t3 CLK_IN low time 61 ns t4 SYNC_IN low setup to CLK_IN ↓ (PEB conventional) 10 ns t5 SYNC_IN low hold from CLK_IN ↓ (PEB conventional) 10 ns t6 SYNC_IN high setup to CLK_IN ↓ (PEB conventional) 10 ns t7 SYNC_IN high hold from CLK_IN ↓ (PEB conventional) 10 ns t8 SYNC_IN setup to CLK_IN ↓ (ST-BUS) 10 ns t9 SYNC_IN hold from CLK_IN ↓ (ST-BUS) 10 ns t10a SCLKx2* ↓ delay from CLK_IN↑ (PEB conventional) 25 ns t10b SCLKx2* ↓ delay from CLK_IN↓ (ST-BUS) 25 ns t11a SCLKx2* ↑ delay from CLK_IN ↑ (PEB conventional) 25 ns t11b SCLKx2* ↑ delay from CLK_IN↓ (ST-BUS) 25 ns t12a SCLK ↑ delay from CLK_IN↑ (PEB conventional) 25 ns t12b SCLK ↑ delay from CLK_IN ↓ (ST-BUS) 25 ns t13a SCLK ↓ delay from CLK_IN ↑ (PEB conventional) 25 ns t13b SCLK ↓ delay from CLK_IN ↓ (ST-BUS) 25 ns t14 FSYNC* ↓ delay from SCLKx2*↑ 30 ns t15 FSYNC* ↑ delay from SCLKx2*↑ 30 ns Note: 1. Timing measured with 200 pF load on all SCbus outputs. t1 t2 t3 t1 t2 t3 t4 t5 t6 t7 t8 t9 t10a t10b t11a t11b t12a t12b t13a t13b t14 t15 CLK_IN (Conventional) SYNC_IN (Conventional) CLK_IN (ST-BUS) SYNC_IN (ST-BUS) SCLKX2* SCLK FSYNC* |
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