aduc7030 Analog Devices, Inc., aduc7030 Datasheet - Page 108

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

Preliminary Technical Data
HIGH VOLTAGE PERIPHERAL CONTROL INTERFACE
The ADuC7030/ADuC7033 integrates a number of high voltage
circuit functions, which are controlled and monitored via a
registered interface consisting of 2 MMRs, namely, HVCON
and HVDAT. The HVCON register acts as a command byte
interpreter allowing the microcontroller to indirectly read or
write 8-bit data (the value in HVDAT) from/to one of 4 High
voltage status/configuration registers. It should be noted that
these high voltage registers are not MMRs but are so called
‘indirect’ registers that can only be accessed (as the name
suggests) indirectly via the HVCON and HVDAT MMRs.
The physical interface between the HVCON register and the
indirect high voltage registers is a 2-wire (data and clock) serial
interface based on a 2.56MHz serial clock. Therefore, there is a
finite, 10µsecs (maximum) latency between the MCU core
writing a command into HVCON and that command or data
reaching the indirect high voltage registers. There is also a finite
10µsecs latency between the MCU core writing a command into
PERIPHERALS
ARM7
MCU
AND
IRQ3
(IRQEN[16])
HIGH-VOLTAGE
INTERFACE
WU DIAGNOSTIC I/P
STI DIAGNOSTIC I/P
LIN DIAGNOSTIC I/P
HVCON
HVDAT
MMRs
Figure 36. High Voltage Interface, Top Level Block Diagram
HVCFG0[4]
HVCFG1[3]
HVCFG1[7]
HVCFG1[5]
SERIAL
SERIAL
CLOCK
P2.6
P2.5
DATA
Rev. PrE | Page 108 of 150
HIGH VOLTAGE
HIGH VOLTAGE
CONTROLLER
CONTROLLER
CONTROLLER
ATTENUATOR
DIAGNOSTIC
INTERFACE
INTERRUPT
BUFFER
SERIAL
AND
HVCON and indirect register data being read back into the
HVDAT register. A busy bit (Bit0 of the HVCON when read by
MCU) can be polled by the MCU to confirm when a read/write
command has completed.
The following high voltage circuit functions are controlled and
monitored via this interface and Figure 36 below describes the
top-level architecture of the high voltage interface and related
circuits.
Precision Oscillator
Wake-Up pin functionality
Power Supply Monitor
Low Voltage Flag
LIN Operating Modes
STI Diagnostics
High Voltage Diagnostics
High Voltage Attenuator/Buffer Circuit
High Voltage Temperature Monitor
HVCFG1[6]
PSM—HVSTA[5]
WU—HVSTA[4]
OVER TEMP—HVSTA[3]
LIN S-SCT—HVSTA[2]
STI S-SCT—HVSTA[1]
WU S-SCT—HVSTA[0]
WU DIAGNOSTIC O/P
HVMON[7]
STI DIAGNOSTIC O/P
HVMON[5]
LIN DIAGNOSTIC O/P
P2.4
HIGH-VOLTAGE
REGISTERS
(INDIRECT)
HVCFG0
HVCFG1
HVMON
HVSTA
MONITOR
HV TEMP
HVCFG0[6]
HVCFG0[3]
HVCFG0[2]
HVCFG0[1:0]
HVCFG0[5]
HVCFG0[4]
HVCFG1[4]
HVCFG1[4]
HVCFG1[3]
ADuC7030/ADuC7033
OSCILLATOR
PRECISION
CONTROL
CONTROL
MODES
WU I/O
STI I/O
PSM
LVF
LIN