13.6.8.7 Backup Clock Division

Name: BUPDIV
Offset: 0x06
Reset: 0x01
Property: PAC Write-Protection

Bit 76543210 
 BUPDIV[7:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 

Bits 7:0 – BUPDIV[7:0] Backup Clock Division Factor

These bits define the division ratio of the main clock prescaler (2n) related to the Backup clock domain. To ensure correct operation, frequencies must be selected so that FCPU ≥ FLP ≥ F_BUP (i.e. BUPDIV ≥ LPDIV ≥ CPUDIV). Also, frequencies must never exceed the specified maximum frequency for each clock domain.

ValueNameDescription
0x01 DIV1 Divide by 1
0x02 DIV2 Divide by 2
0x04 DIV4 Divide by 4
0x08 DIV8 Divide by 8
0x10 DIV16 Divide by 16
0x20 DIV32 Divide by 32
0x40 DIV64 Divide by 64
0x80 DIV128 Divide by 128
others - Reserved