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SAB82525N Datasheet(PDF) 56 Page - Infineon Technologies AG |
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SAB82525N Datasheet(HTML) 56 Page - Infineon Technologies AG |
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56 / 126 page  Semiconductor Group 56 SAB 82525 SAB 82526 SAF 82525 SAF 82526 Summary The features of the different clock modes are summarized in table 6. Table 6 Clock Modes of HSCX Note: 1) The maximum data rate in an externally clocked operating mode is 4.1 Mbit/s. In an internally clocked operating mode with an external reference clock, or using the OSC, the maximum clock rate is 12 MHz or 19.2 MHz if the scaling factor of the BRG is programmed to 1. The maximum data rate will be 1200 kbit/s. 2) The ratio between the receive frequency (fr) and the transmit frequency (fx) for a channel must satisfy the condition fr/fx less than 3 in clock modes 0, 2, 6; there are no restrictions on the phase shift. Slower transmit data rates can be realized with receive and transmit strobes (clock mode 1). 3) The clock modes 4, 6, 7 use the internal OSC and need an external quartz crystal to be connected at the RxCLK A-AxCLK A pins. It is not necessary to use two separate crystals for the two serial channels, instead it is sufficient to apply the crystal to channel A and provide the reference clock for channel B by externally connecting the AxCLKA and RxCLKB pins. The SAB 82526 also uses the RxCLK A-AxCLK A pins to connect to an external quartz crystal. Channel Configuration Clock Sources Control Sources Timer Source Clock Mode CCR1 CM2, CM1, CM0 CCR2 Output via TxCLK TSS TIO BRG DPLL REC TRM CD R-Strobe X-Strobe F-Sync TCP 0 1 2 2 3 4 4 5 6 6 6 7 7 0 0 0 1 0 0 0 0 0 1 1 0 0 0 0 0 1 1 0 1 0 0 0 1 0 1 – – RxCLK RxCLK RxCLK – – – OSC OSC OSC OSC OSC – – BRG BRG BRG – – – BRG BRG BRG BRG BRG RxCLK RxCLK DPLL DPLL DPLL OSC OSC RxCLK DPLL DPLL DPLL DPLL DPLL TxCLK RxCLK TxCLK BRG/16 DPLL OSC OSC RxCLK TxCLK BRG/16 BRG/16 DPLL DPLL AxCLK – AxCLK AxCLK AxCLK TxCLK … TxCLK – TxCLK – TxCLK – – AxCLK – – – – – (TSAR) – – – – – – TxCLK – – – – – (TSAX) – – – – – – – – – – – – AxCLK – – – – – – – – BRG/16 DPLL – OSC TS-Control – – BRG/16 – DPLL TxCLK RxCLK TxCLK DPLL DPLL OSC OSC RxCLK TxCLK BRG/16 BRG/16 DPLL DPLL SAB 82525 SAB 82526 SAF 82525 SAF 82526 |
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