JANUARY 25, 2017 11 VERSACLOCK
®
PROGRAMMABLE CLOCK GENERATOR
5P35021 DATASHEET
VBAT
The 5P35021 supports Low Power operation 32.768kHz RTC clock with only coin cell battery supply. The coin cell battery power
capacitance is usually 170mAhr or higher, with less than 2µA* low-power DCO operation mode will support application up to few
years clock source for date/time keeping circuit (RTC).
When there is main power exist like VDD33 and VDDA, the 5P35021 will switch DCO power source to main power to save battery
power. VBAT should be powered earlier or at same time with other VDD power up.
VBAT Switching Threshold
ORT–VCO Over-shoot Reduction Technology
The 5P35021 supports innovate the VCO over-shoot reduction technology (ORT) to prevent an output clock frequency spike
when the device is changing frequency on the fly or doing DFC (Dynamic Frequency Control) function. The VCO frequency
changes are under control instead of free-run to targeted frequency.
PLL Features and Descriptions
VDD33
VBAT
Switch to VBAT
(VDD33 falling down to 2.3V)
Switch to VDD33
(VDD33 raise up to 2.5V )
VDD33 VBAT DCO power source
>2.5V
--
VDD33
<2.3V
--
VBAT
*VBAT needs to be 3.0V~3.3V
Output divider 1 table
Output Divider bits<1:0> OO O1 1O 11
OO 1248
O1 4 8 16 32
1O 5 10 20 40
11 6 12 24 48
Output 2,4,5 divider table
Output Divider bits<1:0> OO O1 1O 11
OO 1245
O1 3 6 12 15
1O 5 10 20 25
11 10 20 40 50
Output 3 divider table
Output Divider bits<1:0> OO O1 1O 11
OO 1248
O1 3 6 12 24
1O 5 10 20 40
11 10 20 40 80
Output Divider bits<3:2>
Output Divider bits<3:2>
Output Divider bits<3:2>
