Voltage Detector - Holtek BS86DH12C Manual

BS86DH12C
High Voltage Touch A/D Flash MCU with HVIO
• PDC Register
Bit 7
Name —
R/W —
POR —
Bit 7~6 Unimplemented, read as "0"
PDC5~PDC0: HVIO PD5~PD0 pin input/output type selection
Bit 5~0
0: Output
1: Input
• PDOM Register
Bit 7
Name —
R/W —
POR —
Bit 7~6 Unimplemented, read as "0"
PDOM5~PDOM0: HVIO PD5~PD0 output mask control
Bit 5~0
0: No output mask
1: Output mask
• PWRDET Register
Bit
Name PWRRDYF
R/W R
POR
Bit 7 PWRRDYF: V
0: Power not ready – V
1: Power ready – V
During the power-on voltage rising process, when the MCU operates normally and
the V
whether the V
PWRRDYF read value may be 0 or 1 and therefore in an unknown condition.
Bit 6~1 Unimplemented, read as "0"
Bit 0 SFRTC: HVIO short flag response time selection
0: 64×t
1: 32×t

Voltage Detector

An internal voltage detector circuit is used to monitor the V
a power ready flag, PWRRDYF, which can be read by the MCU to indicate the power status. If
the V is equal to or greater than the V
CC2
PWRRDYF=1, otherwise PWRRDYF=0.
In addition, there is also a V
the internal A/D converter for the power good detection purpose.
The VCC1 is the LDO high voltage power input pin. A power divided voltage V
using a divider resistor, this voltage can be externally connected to the A/D converter internal input
channel for measurement.
Rev. 1.00
6 5
— PDC5 PDC4
— R/W
— 1
6 5
— PDOM5 PDOM4
— R/W
— 0
7 6 5
— —
— —
x — —
and V Power ready flag
CC2 DD
< V
CC2 DET1
≥ V and V
CC2 DET1
voltage is equal to or greater than the V
DD
voltage is equal to or greater than the V
CC2
~ 96×t
LIRC LIRC
~ 64×t
LIRC LIRC
, and the V
DET1
voltage output with a value of 0.2V
CC2O
75
4 3 2
PDC3 PDC2
R/W R/W R/W
1 1 1
4 3 2
PDOM3 PDOM2
R/W R/W R/W
0 0 0
4 3 2
— — —
— — —
— — —
or V < V
DD DET2
≥ V
DD DET2
voltage, it is not yet determined
DET2
DET1
and V voltage levels. It provides
CC2 DD
is equal to or greater than the V
DD
, which can be measured by
CC2
1 0
PDC1 PDC0
R/W R/W
1 1
1 0
PDOM1 PDOM0
R/W R/W
0 0
1 0
— SFRTC
— R/W
— 0
"x": unknown
voltage, then the
, then
DET2
is generated
CC1O
October 26, 2018