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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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AT89LP428 Arkusz danych(PDF) 54 Page - ATMEL Corporation |
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AT89LP428 Arkusz danych(HTML) 54 Page - ATMEL Corporation |
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54 / 149 page  54 3654A–MICRO–8/09 AT89LP428/828 Table 12-4. T2MOD – Timer 2 Mode Control Register T2MOD Address = 0C9H Reset Value = 0000 0000B Not Bit Addressable PHSDPHS2PHS1PHS0 T2CM1 T2CM0 T2OE DCEN Bit 765 43 210 Symbol Function PHSD CCA Phase Direction. For phase modes with 3 or 4 channels, PHSD determines the direction that the channels are cycled through. PHSD also determines the initial phase relationship for 2 phase modes. PHSD Direction 0 or or 1 or or PHS [2 - 0] CCA Phase Mode. PWM channels may be grouped by 2, 3 or 4 such that only one channel in a group produces a pulse in any one period. The PHS [2 - 0] bits may only be written when the timer is not active, i.e. TR2 = 0. PHS2 PHS1 PHS0 Phase Mode 000 Disabled, all channels active 0 0 1 2-phase output on channels A & B 0 1 0 3-phase output on channels A, B & C 0 1 1 4-phase output on channels A, B, C & D 100 Dual 2-phase output on channels A & B and C & D 101 reserved 110 reserved 111 reserved T2CM [1 - 0] Timer 2 Count Mode. T2CM1 T2CM0 Count Mode 00 Standard Timer 2 (up count: ) 0 1 Clear on RCAP compare (up count: ) 10 Dual-slope with single update (up-down count: ) 11 Dual-slope with double update (up-down count: ) T2OE Timer 2 Output Enable. When T2OE = 1 and C/T2 = 0, the T2 pin will toggle after every Timer 2 overflow. DCEN Timer 2 Down Count Enable. When Timer 2 operates in Auto-reload mode and EXEN2 = 1, setting DCEN = 1 will cause Timer 2 to count up or down depending on the state of T2EX. ABAB →→→ AB CABC →→ →→→ ABCDABCD →→ → →→→ → BABA →→→ CBACBA →→→ → → DCBADCBA → →→→ → → → BOTTOM MAX → MIN TOP → MIN TOP MIN →→ MIN TOP MIN →→ |
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