AVR128DA28S CLKCTRL registers The 9 registers of CLKCTRL (Clock controller), from 0x60, with their reset value and every field. The AVR128DA28S has 473 registers in 45 peripherals, one page each.
CLKCTRL Clock controller MCLKCTRLAMCLK Control A
Address 0x60
Reset 0x00
Access read/write 7 CLKOUT 6 – 5 – 4 – 3 – 2 CLKSEL2 1 CLKSEL1 0 CLKSEL0 2 fields
Field Bits What it does CLKOUT 7 System clock out CLKSEL 2:0 Clock select0 Internal high-frequency oscillator1 Internal 32.768 kHz oscillator2 32.768 kHz crystal oscillator3 External clock
MCLKCTRLBMCLK Control B
Address 0x61
Reset 0x00
Access read/write 7 – 6 – 5 – 4 PDIV3 3 PDIV2 2 PDIV1 1 PDIV0 0 PEN 2 fields
Field Bits What it does PDIV 4:1 Prescaler division0 2X1 4X2 8X3 16X4 32X5 64X8 6X9 10X10 12X11 24X12 48X PEN 0 Prescaler enable
MCLKLOCKMCLK Lock
Address 0x62
Reset 0x00
Access read/write 7 – 6 – 5 – 4 – 3 – 2 – 1 – 0 LOCKEN 1 field
Field Bits What it does LOCKEN 0 lock ebable
MCLKSTATUSMCLK Status
Address 0x63
Reset 0x00
Access read/write 7 – 6 – 5 PLLS 4 EXTS 3 XOSC32KS 2 OSC32KS 1 OSCHFS 0 SOSC 6 fields
Field Bits What it does PLLS 5 PLL oscillator status EXTS 4 External Clock status XOSC32KS 3 32.768 kHz Crystal Oscillator status OSC32KS 2 32KHz oscillator status OSCHFS 1 High frequency oscillator status SOSC 0 System Oscillator changing
OSCHFCTRLAOSCHF Control A
Address 0x68
Reset 0x0C
Access read/write 7 RUNSTDBY 6 – 5 FRQSEL3 4 FRQSEL2 3 FRQSEL1 2 FRQSEL0 1 – 0 AUTOTUNE 3 fields
Field Bits What it does RUNSTDBY 7 Run standby FRQSEL 5:2 Frequency select0 1 MHz system clock1 2 MHz system clock2 3 MHz system clock3 4 MHz system clock (default)5 8 MHz system clock6 12 MHz system clock7 16 MHz system clock8 20 MHz system clock9 24 MHz system clock AUTOTUNE 0 Autotune
OSCHFTUNEOSCHF Tune
Address 0x69
Reset 0x00
Access read/write 7 TUNE7 6 TUNE6 5 TUNE5 4 TUNE4 3 TUNE3 2 TUNE2 1 TUNE1 0 TUNE0 1 field
Field Bits What it does TUNE 7:0 Tune
PLLCTRLAPLL Control A
Address 0x70
Reset 0x00
Access read/write 7 RUNSTDBY 6 SOURCE 5 – 4 – 3 – 2 – 1 MULFAC1 0 MULFAC0 3 fields
Field Bits What it does RUNSTDBY 7 Run standby SOURCE 6 Source MULFAC 1:0 Multiplication factor0 PLL is disabled1 2 x multiplication factor2 3 x multiplication factor
OSC32KCTRLAOSC32K Control A
Address 0x78
Reset 0x00
Access read/write 7 RUNSTDBY 6 – 5 – 4 – 3 – 2 – 1 – 0 – 1 field
Field Bits What it does RUNSTDBY 7 Run standby
XOSC32KCTRLAXOSC32K Control A
Address 0x7C
Reset 0x00
Access read/write 7 RUNSTDBY 6 – 5 CSUT1 4 CSUT0 3 – 2 SEL 1 LPMODE 0 ENABLE 5 fields
Field Bits What it does RUNSTDBY 7 Run standby CSUT 5:4 Crystal startup time0 1k cycles1 16k cycles2 32k cycles3 64k cycles SEL 2 Select LPMODE 1 Low power mode ENABLE 0 Enable
BETA