Cypress FM4 Series - Page 315

CHAPTER 7-3: VBAT Domain(B)
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 315
Application of 32 kHz Oscillation Circuit
See 5 Procedure for Setting 32 kHz Clock for details of application.
Registers Used for 32 kHz Oscillation Circuit
TYPE1-M4, TYPE2-M4, TYPE3-M4 products
bit
31 - 24
23 - 16
15 - 8
7 - 0
Initial Value
Attribute
Reserved
Reserved
Reserved
VB_CLKDIV
0x00000007
R/W
Reserved
Reserved
Reserved
WTOSCCNT
0x00000001
R/W
Reserved
Reserved
Reserved
CCS
0x00000008
R/W
Reserved
Reserved
Reserved
CCB
0x00000010
R/W
Reserved
Reserved
Reserved
BOOST
0x00000003
R/W
Reserved
Reserved
Reserved
EWKUP
0x00000000
R/W
Reserved
Reserved
Reserved
VDET
0x00000080
R/W
Reserved
Reserved
Reserved
HIBRST
0x00000000
R/W
TYPE4-M4 products
bit
31 - 24
23 - 16
15 - 8
7 - 0
Initial Value
Attribute
Reserved
Reserved
Reserved
VB_CLKDIV
0x00000007
R/W
Reserved
Reserved
Reserved
WTOSCCNT
0x00000001
R/W
Reserved
Reserved
Reserved
CCS
0x000000CE
R/W
Reserved
Reserved
Reserved
CCB
0x000000CE
R/W
Reserved
Reserved
Reserved
BOOST
0x00000003
R/W
Reserved
Reserved
Reserved
EWKUP
0x00000000
R/W
Reserved
Reserved
Reserved
VDET
0x00000080
R/W
Reserved
Reserved
Reserved
HIBRST
0x00000000
R/W
The interface circuit types for the above registers are type 1 and type 3 and type 4.
The save operation and recall operation of the 32 kHz oscillation circuit are PWRITE and PREAD
respectively.