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Field
Name
R/W
Description
31
LPWRRSTFLG
R
Low Power Reset Flag
When low-power management is reset, it is set to 1 by
hardware and cleared by software by writing RSTFLGCLR bit.
0: Reset does did not occur
1: Reset occurred
Spread spectrum clock configuration register (RCM_SSCCFG)
Offset address: 0x80
Reset value: 0x0000 0000
Access: Access in the form of word, half word and byte, with 0 to 3 wait cycles.
Because the spread spectrum clock only acts on PLL1, this register can be
written only when PLL1 is not enabled to configure the spread spectrum clock.
Field
Name
R/W
Description
12:0
MODPCFG
R/W
Modulation Period Configure
Set to 1 or cleared by software.
Configure the input of modulation period.
27:13
STEP
R/W
Incrementation Step
Set to 1 or cleared by software.
Configure the input of modulation amplitude.
29:28
Reserved
30
SSSEL
R/W
Spread Spectrum Select
It is set or cleared by software.
0: Center spread
1: Downward spread
31
SSEN
R/W
Spread Spectrum Enable
Set to 1 or cleared by software.
0: Disable
1: Enable
PLL2 configuration register (RCM_PLL2CFG)
Offset address: 0x84
Reset value: 0x2000 3000
Access in the form of word, half word and byte, without wait cycle.
The register is used to configure various parameters so as to output different
clock signals.
f
(VCO clock)
=f
(PLL2 clock input)
×(PLL2A/PLLB)
f
(PLL2 clock output)
=f
(VCO clock)
/PLL2C
Field
Name
R/W
Description
5:0
Reserved
14:6
PLL2A
R/W
PLL Multiplication Factor
It is used to calculate VCO frequency. The calculation formula is
f
(
VCO output)= f
(
VCO input)×PLL2A, and the formula is established
only when PLL2A is 50~432.
000000000: PLL2A=0 (error)