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ADuC7033
Rev. B | Page 104 of 140
High Voltage Monitor Register
Name: HVMON
Address: Indirectly addressed via the HVCON high voltage interface
Default Value: 0x00
Access: Read only
Function: This 8-bit, read only register reflects the current status of enabled high voltage related circuits and functions on the
ADuC7033. This register is not an MMR and does not appear in the MMR memory map. It is accessed via the
HVCON registered interface, and data is read back from this register via HVDAT.
Table 76. HVMON Bit Designations
Bit Description
7 WU Pin Diagnostic Readback. When enabled via HVCFG1[4], this read-only bit reflects the state of the external WU pin.
6 Overtemperature.
This bit is 0 if a thermal shutdown event has not occurred.
This bit is 1 if a thermal shutdown event has occurred.
5 STI Pin Diagnostic Readback. When enabled via HVCFG1[4], this read-only bit reflects the state of the external STI pin.
4 Buffer Enabled.
This bit is 0 if the voltage channel ADC input buffer is disabled.
This bit is 1 if the voltage channel ADC input buffer is enabled.
3 Low Voltage Flag Status Bit. Valid only if enabled via HVCFG0[2].
This bit is 0 on power-on if REG_DVDD has dropped below 2.1 V. In this state, RAM contents can be deemed corrupt.
This bit is 1 on power-on if REG_DVDD has not dropped below 2.1 V. In this state, RAM contents can be deemed valid. It
is only cleared by re-enabling the low voltage flag in HVCFG0[2].
2 LIN/BSD Short-Circuit Status Flag.
This bit is 0 if the LIN/BSD driver is operating normally.
This bit is 1 if the LIN/BSD driver has experienced a short-circuit condition and is cleared automatically by writing to
HVCFG1[3].
1 STI Short-Circuit Status Flag.
This bit is 0 if the STI driver is operating normally.
This bit is 1 if the STI driver has experienced a short-circuit condition and is cleared automatically by writing to
HVCFG1[3].
0 Wake Short-Circuit Status Flag.
This bit is 0 if the wake driver is operating normally.
This bit is 1 if the wake driver has experienced a short-circuit condition.