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| 型號(hào)： | EVAL-ADUC7039QSPZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 79/92頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR ADUC7039 |
| 設(shè)計(jì)資源： | ADuC7039QSPZ Gerber Files EVAL-ADuC7039 Schematic & Brd Outline |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | QuickStart™ PLUS 套件 |
| 類型： | MCU |
| 適用于相關(guān)產(chǎn)品： | ADuC7039 |
| 所含物品： | 板 |
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ADuC7039
Data Sheet
Rev. D | Page 80 of 92
High Voltage Configuration Register
Name:
HVCFG
Address:
Indirectly addressed via the HVCON high voltage interface
Default Value: 0x00
Access:
Read/write
Function:
This 8-bit register controls the function of high voltage circuits on the ADuC7039. This register is not an MMR and
does not appear in the MMR memory map. It is accessed via the HVCON registered interface. Data to be written to
this register is loaded via the HVDAT MMR, and data is read back from this register via the HVDAT MMR.
Table 59. HVCFG Bit Designations
Bit
Description
7 to 5
Reserved.
4
Low voltage flag (LVF) enable bit.
This bit is cleared to 0 to disable the LVF function.
This bit is set to 1 to enable the LVF function. The low voltage flag can be interrogated via HVSTA[2]after power-up to
determine if the REG_DVDD voltage previously dropped below 2.1 V.
3
Voltage attenuator diagnostic enable bit.
This bit is set to 1 to turn on a current source, which adds a differential voltage to the voltage channel measurement.
This bit is cleared to 0 to disable the voltage attenuator diagnostic.
2
LIN driver re-enable bit.
This bit is set to 1 to re-enable the LIN driver that would have been disabled as a result of a short-circuit current event.
This bit is cleared to 0 automatically.
1
Enable/disable LIN short-circuit protection.
This bit is set to 1 to enable passive short-circuit protection on the LIN pin. In this mode, a short-circuit event on the
LIN pin generates a high voltage interrupt (if enabled in IRQEN[10]) and asserts the appropriate status bit in HVSTA
but does not disable the short-circuiting pin.
This bit is cleared to 0 to enable active short-circuit protection on the LIN pin. In this mode, during a short-circuit
event, the LIN pin generates a high voltage interrupt (IRQSTA[10]), asserts HVSTA[0], and automatically disables the
short-circuiting pin. When disabled, the I/O pin can only be re-enabled by writing to HVCFG[2].
A LIN short circuit event must last longer than 20 s to be detected.
0
LIN operating mode.
0 = LIN disabled.
1 = LIN enabled.
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