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ICS1574B 数据表(PDF) 7 Page - Integrated Circuit Systems |
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ICS1574B 数据表(HTML) 7 Page - Integrated Circuit Systems |
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7 / 12 page ![]() 7 ICS1574B ] 3 [ K L C P] 2 [ K L C P] 1 [ K L C P] 0 [ K L C PS U L U D O M 0000 3 000 1 ) a ( 4 00 1 0 ) b ( 4 00 11 5 01 0 0 6 01 01 ) a ( 8 01 1 0 ) b ( 8 0 111 0 1 1X 0 0 2 1 1X 0 1 ) a ( 6 1 1X 1 0 ) b ( 6 1 1X 1 1 0 2 ] 1 [ S] 0 [ SN O I T P I R C S E D 00 K L C P e h t f o t u p t u o e h T . ) L L P ( F = ) K L C ( F . 1 = r e l a c s - t s o P . t u p t u o K L C P e h t s e v i r d r e d i v i d 01 e h t f o t u p t u o e h T . 2 / ) L L P ( F = ) K L C ( F . 2 = r e l a c s - t s o P . t u p t u o K L C P e h t s e v i r d r e d i v i d K L C P 10 e h t f o t u p t u o e h T . 4 / ) L L P ( F = ) K L C ( F . 4 = r e l a c s - t s o P . t u p t u o K L C P e h t s e v i r d r e d i v i d K L C P 11 L C P _ X U A e h T . E D O M T S E T N E - X U A K e h t s e v i r d t i b . t u p t u o K L C P Register Mapping — ICS1574B NOTE: It is not necessary to understand the function of these bits to use the ICS1574B. PC Software is available from ICS to automatically generate all register values based on requirements. Contact factory for details. BIT(S) BIT REF. DESCRIPTION 1 – 4 PCLK[0]..PCLK[3] Sets PCLK divider modulus according to this table. These bits are set to implement a divide-by-four on power-up. (X = Don't Care) 5, 6 Reserved Must be set to 0. 7 Reserved Must be set to 1. 8 SELXTAL Normally set to 0. When set to logic 1, passes the reference frequency to the post-scaler instead of the PLL output (defaults to 1 on power-up). 9 Reserved Must be set to 0. 10 Reserved Must be set to 1. 11, 12 Reserved Must be set to 0. 13 – 14 S[0]..S[1] PLL post-scaler / test mode select bits. |
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