Datasheet

FS98O22
Rev. 1.6 35/146
4.2. Voltage Regulator
Figure 4-3 Voltage regulator
Voltage Regulator is used for generating VDDA (3.6V). The input is VGG which is generated by Voltage
Doubler (please see the Section 4.1). The control Register flags are ENVDDA and ENVS. The Outputs are
VDDA and VS. Please see Figure 4-3.
Table 4-4 voltage regulator register table
Address Name
Referenced
Section
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on Power on
Reset
1CH NETE 4/10/11 ENVS SILB[1:0] ENLB 00000000
1DH NETF 4/10/11 ENBAND ENVDDA ENAGND ENVB 00000000
Operations
1. Operate as Section 4.1 to get the VGG (2 times of VDD or external Power Supply).
2. Set the ENVDDA flag.
3. The output, VDDA, is 3.6V.
4. If the user wants VDDA as output voltage source, then the ENVS flag should be set. VS will be the same
as VDDA.
FORTUNE'
Properties
For Reference Only