aduc7033bstz-8l-rl Analog Devices, Inc., aduc7033bstz-8l-rl Datasheet - Page 97

• Manufacturer Part Number: aduc7033bstz-8l-rl
• Description: Integrated Precision Battery Sensor For Automotive
• Manufacturer: Analog Devices, Inc.

HIGH VOLTAGE PERIPHERAL CONTROL INTERFACE
The ADuC7033 integrates a number of high voltage circuit
functions that are controlled and monitored through a regis-
tered interface consisting of two 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 or to one of four high voltage
status or configuration registers. These high voltage registers are
not MMRs but registers commonly referred to as indirect
registers, that is, they 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 2.56 MHz serial clock. Therefore, there is a
finite, 10 μs (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 10 μs
latency between the MCU core writing a command into HVCON
PERIPHERALS
ARM7
MCU
AND
IRQ3
(IRQEN[16])
HIGH VOLTAGE
WU DIAGNOSTIC INPUT
LIN DIAGNOSTIC INPUT
STI DIAGNOSTIC INPUT
INTERFACE
HVCON
HVDAT
MMRs
Figure 38. High Voltage Interface, Top Level Block Diagram
HVCFG0[4]
HVCFG1[3]
HVCFG1[7]
HVCFG1[5]
SERIAL
SERIAL
CLOCK
P2.6
P2.5
DATA
HIGH VOLTAGE
HIGH VOLTAGE
CONTROLLER
Rev. 0 | Page 97 of 136
ATTENUATOR
CONTROLLER
CONTROLLER
DIAGNOSTIC
INTERFACE
INTERRUPT
BUFFER
SERIAL
AND
HVCFG1[6]
and indirect register data being read back into the HVDAT
register. A busy bit (Bit 0 of the HVCON when read by MCU)
can be polled by the MCU to confirm when a read/write
command is complete.
Figure 38 shows the top level architecture of the high voltage
interface and related circuits. The following high voltage circuit
functions are controlled and monitored via this interface:
•
•
•
•
•
•
•
•
•
WU DIAGNOSTIC OUTPUT
HVMON[7]
STI DIAGNOSTIC OUTPUT
HVMON[5]
LIN DIAGNOSTIC OUTPUT
P2.4
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]
Precision oscillator
Wake-up (WU) pin functionality
Power supply monitor (PSM)
Low voltage flag (LVF)
LIN operating modes
STI diagnostics
High voltage diagnostics
High voltage attenuator/buffer circuit
High voltage (HV) temperature monitor
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]
OSCILLATOR
PRECISION
CONTROL
CONTROL
MODES
WU I/O
STI I/O
PSM
LVF
LIN
ADuC7033