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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST10F296 датащи(PDF) 207 Page - STMicroelectronics |
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ST10F296 датащи(HTML) 207 Page - STMicroelectronics |
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207 / 346 page  Obsolete Product(s) - Obsolete Product(s) ST10F296E Real-time clock (RTC) 207/346 RTC divider counter registers (RTCDH and RTCDL) The divider counter registers (the basic reference clocks) include the RTC divider high (RTCDH) and RTC divider low (RTCDL). These registers are read-only. They are reloaded with the value stored in the prescaler registers, RTCPH and RTCPL. To get accurate time measurements, the value of the divider can be read by reading the RTCDH and RTCDL. When a bit is changed in the prescaler register, the value is loaded into the divider. When the divider increments to reach 00000h, the 20-bit word stored in RTCPH or RTCPL is loaded into it. Note: Bits 15 to 4 of the RTCDH are not used. When reading this register, the return value of these bit is zero. Note: Neither the RTCDH nor the RTCDL counter registers can be reset. Figure 74. Divider counter registers RTCDH (ED0Ch) XBus Reset value: ---Xh 15 14 13 12 11 10 987 65432 10 Reserved RTCDH -R RTCDL (ED0Ah) XBus Reset value: XXXXh 15 14 13 12 11 10 987 65432 10 RTCDL R 3 2 1 0 7 6 5 4 11 10 9 8 15 14 13 12 3 2 1 0 RTCDH RTCDL 3 2 1 0 7 6 5 4 11 10 9 8 15 14 13 12 19 18 17 16 20-bit word internal value of the prescaler divider Obsolete Product(s) - Obsolete Product(s) |
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