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MC44BS373CAFC Datasheet(PDF) 10 Page - Freescale Semiconductor, Inc |
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MC44BS373CAFC Datasheet(HTML) 10 Page - Freescale Semiconductor, Inc |
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10 / 28 page  Digital Home 10 Freescale Semiconductor MC44CC373 The following rules apply for the sequences of data bytes for incoming (write) information: • If an odd number of data bytes are received, the last one is ignored. • If nine data bytes are received, the ninth and following ones are ignored, and the last ACK pulse is sent at the end of the eighth data byte. • The optional control register one, most significant and least significant bytes, OC1M, OC1L, data must always be sent after the C1,C0 control data without a stop condition in between. • The optional control register two, most significant and least significant bytes, OC2M, OC2L, data must be sent directly after the OC1M, OC1L data without a stop condition in between. • The Control and Frequency information may be sent as separate I2C write sequences. (Example 1 or Example 5 followed/preceeded by Example 2). Abbreviations: STA = Start condition CA = Chip Address FM = Frequency information, most significant (high order) bits FL = Frequency information, least significant (low order) bits C1 = Control information, most significant (high order) bits CO = Control information, least significant (low order) bits OC1M = Optional Control 1 information, most significant (high order) bits OC1L= Optional Control 1 information, least significant (low order) bits OC2M = Optional Control 2 information, most significant (high order) bits OC2L = Optional Control 2 information, least significant (low order) bits STO = Stop condition I2C Read Mode Format To read back the status data, the read address shown in Table 10 is sent by the master. The modulator then responds with an ACK followed by a byte containing status information on the RF oscillator out-of-frequency range. Table 11. MC44CC373/4 Programming Sequence (Incoming Information) Legacy Devices Data Bytes Example 1 STA CA C1 C0 STO Example 2 STA CA FM FL STO Example 3 STA CA C1 C0 FM FL STO Example 4 STA CA FM FL C1 C0 STO MC44CC37xxxxxx Devices using the Option Control Bytes Example 5 STA CA C1 C0 OC1M OC1L OC2M OC2L STO Example 6 STA CA FM FL C1 C0 OC1M OC1L OC2M OC2L STO |
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