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STA450A Datenblatt(PDF) 11 Page - STMicroelectronics |
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STA450A Datenblatt(HTML) 11 Page - STMicroelectronics |
11 / 66 page 11/66 STA450A Figure 6. PCM Output Formats 1.4 Master Interface I2C The I2C master interface is used by the STA450A to communicate with the external Conditional Access Pro- cessor (CAP) with the following protocol: a) Write sequences 1 6 sc lk cyc les 1 6 sc lk cyc les LR CLK PC M_OU T[2:0] PC M_OU T[2:0] PC M_OR D = 0, PC M_PR EC is 16 bits mode M S L S M S M S M S L S L S L S LRC L K PC M_OU T[2:0] PC M_OU T[2:0] PC M_OU T[2:0] PC M_OU T[2:0] PC M_OR D = 1, PC M_PR EC is 16 bits mode 32 sc lk cy cles 3 2 sclk cycles M S L S M S L S 18 , 20 o r 24 b its 18, 2 0 or 24 bits 18, 20 o r 24 b its 18, 2 0 or 24 bits 18, 2 0 or 24 bits 1 8, 20 o r 24 b its 00 1 8, 20 o r 24 b its 1 8, 20 o r 24 b its M S L S 0 L S M S 0 0 M S 00 M S 0 L S L S PC M _ FO RM AT = 1 PC M _ DIFF = 1 PC M _ FO RM AT = 0 PC M _ FO RM AT = 0 PC M _ FO RM AT = 1 PC M _ DIFF = 0 PC M _ DIFF = 1 PC M _ DIFF = 0 L S M S M S L S MS B MS B STAR T SLAVE ADD RESS SUB-AD DRE SS @ W SA SA DAT A TO @ SA ST OP S UB-A D DR ES S + S ING LE W RITE S UB-A D DR ES S IN ITIA LIZA T ION W : R/W BIT = WR IT E SA : SLAVE ACKNOWL ED GE @ : SUB -AD DRE SS V AL UE STAR T SLAVE ADD RESS SUB-AD DRE SS @ W SA SA DAT A TO @ SA SU B-AD D RES S + MU LTIP LE W RITE D ATA TO @+1 SA DA TA TO @+2 SA STO P STAR T SLAVE ADD RESS SUB-AD DRE SS @ W SA SA STO P |
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Ähnliche Beschreibung - STA450A |
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