EVAL-ADUC7032QSPZ Analog Devices Inc, EVAL-ADUC7032QSPZ Datasheet - Page 94

• Manufacturer Part Number: EVAL-ADUC7032QSPZ
• Description: EVAL DEV QUICK START ADUC7032
• Manufacturer: Analog Devices Inc
• Series: QuickStart™ PLUS Kitr
• Type: MCUr

Specifications of EVAL-ADUC7032QSPZ

• Contents: Evaluation Board, Power Supply, Cable, Software, Emulator and Documentation
• For Use With/related Products: ADuC7032
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADuC7032-8L
HANDLING INTERRUPTS FROM THE HIGH
VOLTAGE PERIPHERAL CONTROL INTERFACE
An interrupt controller is also integrated with the high voltage
circuits. If enabled via IRQEN[16], one of five high voltage
sources can assert the high voltage interrupt (IRQ3) signal and
interrupt the MCU core.
While the MCU response to this interrupt event is, as normal, to
vector to the IRQ or FIQ interrupt vector address, the high voltage
interrupt controller simultaneously and automatically loads the
current value of the high voltage status register (HVSTA) into the
HVDAT register. During this time the busy bit, HVCON[0], is set
to indicate the transfer is in progress and clears after 10 μs to
indicate the HVSTA contents are available in HVDAT.
The interrupt handler can, therefore, poll the busy bit in HVCON
until it deasserts and then read the HVDAT register.
Table 78. High Voltage Diagnostics
High Voltage Pin
LIN
WU
Fault Condition
Short between
LIN and VBAT
Short between
LIN and GND
Short between
WU and VBAT
Short between
WU and GND
Open circuit
Method
Drive LIN low
Drive LIN high
Drive WU low
Drive WU high
Enable OC diagnostic resistor with
WU disabled
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At this time, HVDAT holds the value of the HVSTA register.
The status flags can then be interrogated to determine the exact
source of the high voltage interrupt and take appropriate action.
LOW VOLTAGE FLAG (LVF)
The ADuC7032-8L features a low voltage flag (LVF) that, when
enabled, allows the user to monitor REG_DVDD. When
enabled via HVCFG0[2], the low voltage flag can be monitored
through HVMON[3]. If REG_DVDD drops below 2.1 V,
HVMON[3] is cleared. If REG_DVDD drops below 2.1 V,
the RAM contents are corrupted. Once the low voltage flag is
enabled, it is reset only by REG_DVDD dropping below 2.1 V
or the disabling of the LVF functionality using HVCFG0[2].
HIGH VOLTAGE DIAGNOSTICS
It is possible to diagnose fault conditions on the WU and LIN
bus, as detailed in Table 78.
Result
LIN short-circuit interrupt is generated after 20 μs
if more than 100 mA is drawn continuously.
LIN readback low.
Readback high.
WU short-circuit interrupt is generated after 400 μs if more
than 200 mA is sourced.
HVMON[7] is cleared if load is connected; HVMON[7] is set
if WU is open-circuited.