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AT91SAM9G20 Datasheet(PDF) 104 Page - ATMEL Corporation |
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AT91SAM9G20 Datasheet(HTML) 104 Page - ATMEL Corporation |
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104 / 832 page  104 6384D–ATARM–04-May-09 AT91SAM9G20 Preliminary 15.4.1 Real-time Timer Mode Register Register Name: RTT_MR Access Type: Read/Write • RTPRES: Real-time Timer Prescaler Value Defines the number of SLCK periods required to increment the Real-time timer. RTPRES is defined as follows: RTPRES = 0: The prescaler period is equal to 216. RTPRES …0: The prescaler period is equal to RTPRES. • ALMIEN: Alarm Interrupt Enable 0 = The bit ALMS in RTT_SR has no effect on interrupt. 1 = The bit ALMS in RTT_SR asserts interrupt. • RTTINCIEN: Real-time Timer Increment Interrupt Enable 0 = The bit RTTINC in RTT_SR has no effect on interrupt. 1 = The bit RTTINC in RTT_SR asserts interrupt. • RTTRST: Real-time Timer Restart 1 = Reloads and restarts the clock divider with the new programmed value. This also resets the 32-bit counter. 31 30 29 28 27 26 25 24 –––––––– 23 22 21 20 19 18 17 16 ––––– RTTRST RTTINCIEN ALMIEN 15 14 13 12 11 10 9 8 RTPRES 76543210 RTPRES |
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