Abov AC30M1x32, User Manual, Page: 56 / 246

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56 / 246
AC30M1x64/1x32
ABOV Semiconductor
VDCCON VDC Control Register 1.5.18
On chip VDC control register. VDCTRIM is used for the trim value of VDC output. To modify VDCTRIM bit, VDCTE should
be write ‘1’ simultaneously. VDCWDLY value can be written with writing ‘1’ to VDCDE bit simultaneously. To change
VDCCON register value, it has to enter TRIM mode.
VDCCON=0x4000_0064
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
V
D
C
M
E
R
e
se
rv
e
d
ST
O
P
SE
L
R
e
se
rv
e
d
R
e
se
rv
e
d
V
D
C
D
E
V
D
C
W
D
LY
0 0 0 0x04
WO WO WO WO
31 VDCME VDCMODE value write enable. Write only with VDCMODE value.
0
VDCMODE field is not updated by writing
1 VDCMODE filed can be updated by writing
25 STOPSEL STOP MODE Select bit.
0
VDC STOP MODE 1
1 VDC STOP MODE 2
8
VDCDE VDCWDLY value write enable. Write only with VDCWDLY value
0
VDCWDLY Write disable
1 VDCWDLY Write Enable
3
0 VDCWDLY VDC warm-up delay count value.
When SCU is waked up from power down mode, the warm-up
delay is inserted for VDC output being stabilized.
The amount of delay can be defined with this register value 4 :
2msec
CAUTION!!) you must not set the reserved bit field.
Note) how to enter TRIM mode to change VDCCON value.
FM->MR=0xa5;
FM->MR=0x5a;
// TRIM mode enter
SCU->VDCCON = (1UL<<31) | (1UL<<25); // set VDC STOP MODE 2
FM->MR=0; // TRIM mode exit