ATtiny1624/1626/1627

CNT

Count

The RTC.CNTL and RTC.CNTH register pair represents the 16-bit value, RTC.CNT. The low byte [7:0] (suffix L) is accessible at the original offset. The high byte [15:8] (suffix H) can be accessed at offset + 0x01.

Due to the synchronization between the RTC clock and main clock domains, there is a latency of two RTC clock cycles from updating the register until this has an effect. The application software needs to check that the CNTBUSY flag in RTC.STATUS is cleared before writing to this register.

  0x08 16 - 0x0000    

Count

Bit  15 14 13 12 11 10 9 8  
  CNT[15:8]  
Access  R/W R/W R/W R/W R/W R/W R/W R/W  
Reset  0 0 0 0 0 0 0 0  
Bit  7 6 5 4 3 2 1 0  
  CNT[7:0]  
Access  R/W R/W R/W R/W R/W R/W R/W R/W  
Reset  0 0 0 0 0 0 0 0  

Bits 15:8 – CNT[15:8]: Counter High Byte

Counter High Byte

These bits hold the MSB of the 16-bit Counter register.

Bits 7:0 – CNT[7:0]: Counter Low Byte

Counter Low Byte

These bits hold the LSB of the 16-bit Counter register.