Datenblatt-Suchmaschine für elektronische Bauteile |
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ISL12032 Datenblatt(PDF) 11 Page - Intersil Corporation |
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ISL12032 Datenblatt(HTML) 11 Page - Intersil Corporation |
11 / 26 page 11 FN6618.0 December 14, 2007 REGISTER ACCESS The contents of the registers can be modified by performing a byte or a page write operation directly to any register address. The registers are divided into 10 sections. They are: 1. Real Time Clock (8 bytes): Address 00h to 07h. 2. Status (2 bytes): Address 08h to 09h. 3. Counter (2 bytes): Address Ah to Bh. 4. Control (9 bytes): 0Ch to 14h. 5. Day Light Saving Time (8 bytes): 15h to 1Ch 6. Alarm 0/1 (12 bytes):1Dh to 28h 7. Time Stamp for Battery Status (5 bytes): Address 29h to 2Dh. 8. Time Stamp for VDD Status (5 bytes): Address 2Eh to 32h. 9. Time Stamp for Event Status (5 bytes):33h to 37h. Write capability is allowable into the RTC registers (00h to 07h) only when the WRTC bit (bit 6 of address 0Ch) is set to “1”. A multi-byte read or write operation is limited to one section per operation. Access to another section requires a new operation. A read or write can begin at any address within the section. A register can be read by performing a random read at any address at any time. This returns the contents of that register location. Additional registers are read by performing a sequential read. For the RTC and Alarm registers, the read instruction latches all clock registers into a buffer, so an update of the clock does not change the time being read. At the end of a read, the master supplies a stop condition to end the operation and free the bus. After a read, the address remains at the previous address +1 so the user can execute a current address read and continue reading the next register. It is only necessary to set the WRTC bit prior to writing into the RTC registers. All other registers are completely accessible without setting the WRTC bit. ISL12032 |
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