aduc7030 Analog Devices, Inc., aduc7030 Datasheet - Page 115

• Manufacturer Part Number: aduc7030
• Description: Integrated Precision Battery Sensor For Automotive
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
WAKE-UP (WU)
The WU pin is a high voltage GPIO controlled via HVCON and
HVDAT.
Wake-Up (WU) Pin Circuit Description
The WU pin is configured by default as an output with an
internal 10K:pull-down resistor and high side FET driver. The
WU pin in its default mode of operation is specified to generate
an active high system wake-up request by forcing the external
system WU bus high. User code can assert the WU output by
writing directly to HVCFG0[4].
It should be noted the output will only respond after the
10µsecs latency through the (serial communication based) high
voltage interface.
The internal FET is capable of sourcing significant current and
therefore a substantial on-chip self-heating can occur if this
driver is asserted for a long time period. For this reason a
Monoflop, a 1.3-second timeout timer, has been included. By
default the Monoflop is enabled and will disable the Wake
OUTPUT CONTROL
SHORT CIRCUIT
PROTECTION
HVCFG0[4]
HVMON[0]
HVMON[7]
NORMAL
NORMAL
IMMUNITY
GLITCH
400µs
READ-BACK
HVCFG1[4]
ENABLE
SHORT CIRCUIT
TRIP REFERENCE
3V
Figure 37. WU Circuit, Block Diagram
Rev. PrE | Page 115 of 150
6.6kŸ
3.3kŸ
IO_VSS
R1
R2
VDD
INTERNAL
SENSE
RESISTOR
6kŸ
INTERNAL
10kŸ
RESISTOR
Driver after 1.3 seconds. It is possible to disable the Monoflop
via HVCFG1[1]. If the Wake Monoflop is disabled, then the
Wake driver should be disabled after 1.3s.
The WU Pin also features a short circuit detection feature.
When the wake Pin sources more than 100mA typically for
400µS a high voltage interrupt will be generated with
HVMON[0] set.
A thermal shutdown event disables the WU Driver. The WU
driver must be re-enabled manually after a thermal event via
HVCFG1[3].
The WU pin can be configured in I/O mode by writing a 1 to
HVCFG1[4]. In this mode, a rising or falling edge will
immediately generate a high voltage interrupt. HVMON[7]
directly reflects the state of the external WU pin. This
comparator has a trip level of 3V
O/C
DIAGNOSTIC
RESISTOR
HVCFG1[0]
EXTERNAL
WU PIN
CURRENT-LIMIT
EXTERNAL
RESISTOR
39Ÿ
ADuC7030/ADuC7033
TYP
C
91nF
.
LOAD
R
1kŸ
LOAD
EXTERNAL
WAKE BUS