High Voltage I/O Registers - Holtek BS86DH12C Manual

PDn_OE: PDn output global enable signal
PDn_DIN: PDn input data
3. When the comparison result between PDn_DOUT and PDn_DIN is different, the LIRC oscillator will
be enabled by the hardware until the short circuit condition is released even if the CPU and LIRC are
both off. After the LIRC clock is stable, the f
functions. If the MCU is still in CPU off mode, the LIRC will be turned off after the short circuit
condition has been released.
4. The PDn_OE truth table is shown as follows:
PWRRDY
0
1
1
1
1
5. The PDn truth table is shown as follows:
PDn_OE PDn_DOUT
0 0
0 1
1 0
1 1

High Voltage I/O Registers

Overall operation of high voltage I/O port is controlled using a series of registers. The PD register
is the data register. The PDC register is used to select the input/output type. The PDOM register is
used for output mask control. The remaining register PWRDET is used to monitor the power supply
status and select short flag response time.
Register
Name
PD —
PDC —
PDOM —
PWRDET PWRRDYF
• PD Register
Bit 7
Name —
R/W —
POR —
Bit 7~6 Unimplemented, read as "0"
Bit 5~0 PD5~PD0: HVIO PD5~PD0 Data bit
Rev. 1.00
High Voltage Touch A/D Flash MCU with HVIO
clock can be used as the clock source of the peripheral
LIRC
PWRRDYF PDOMn
0 0
1 0
1 0
1 1
1 1
PDn
Floating Input mode
V
Output mode
SS
(Short-circuit protection is enabled when PWRRDYF=1)
V
CC2
7 6 5
— PD5
— PDC5
— PDOM5 PDOM4
— —
High Voltage I/O Register List
6 5
— PD5
— R/W
— 1
74
PDn_DOUT_EN PDn_OE
0
0
1
0
1
PDn Mode
Bit
4 3 2
PD4 PD3 PB2
PBC4 PDC3 PDC2
PDOM3 PDOM2
— — —
4 3 2
PD4 PD3 PD2
R/W R/W R/W
1 1 1
BS86DH12C
0
0
1
0
0
1 0
PD1 PD0
PDC1 PDC0
PDOM1 PDOM0
— SFRTC
1 0
PD1 PD0
R/W R/W
1 1
October 26, 2018