ATMEGA32HVB-8X3 Atmel, ATMEGA32HVB-8X3 Datasheet - Page 108

• Manufacturer Part Number: ATMEGA32HVB-8X3
• Description: MCU AVR 32KB FLASH 8MHZ 44TSSOP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA32HVB-8X3

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SPI
• Peripherals: POR, WDT
• Number Of I /o: 17
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 25 V
• Data Converters: A/D 7x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TSSOP
• Processor Series: ATMEGA32x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: SPI, TWI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRSB200
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 7 Channel
• Package: 44TSSOP
• Device Core: AVR
• Family Name: ATmega
• Maximum Speed: 8 MHz
• Operating Supply Voltage: 5|9|12|15|18|24 V
• For Use With: ATSTK524 - KIT STARTER ATMEGA32M1/MEGA32C1ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

19. Coulomb Counter – Dedicated Fuel Gauging Sigma-delta ADC
19.1
19.2
8042B–AVR–06/10
Features
Overview
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ATmega16/32HVB features a dedicated Sigma-Delta ADC (CC-ADC) optimized for Coulomb
Counting. By sampling the charge or discharge current flowing through an external sense resis-
tor RSENSE, the CC-ADC is used to track the flow of current going into and out of the battery
cells.
Figure 19-1. Coulomb Counter Block Diagram
The CC-ADC has a programmable voltage range allowing trade-off to be made between resolu-
tion, dynamic range and external sense resistor RSENSE.
R
Sampled System Coulomb Counter
Low Power Sigma-Delta ADC Optimized for Coulomb Counting
Instantaneous Current Output with 3.9 ms Conversion Time
Accumulate Current Output
Regular Current Detection Mode
Programmable Input Voltage Range ± 100/200mV
Offset canceling by input polarity switching
SENSE
– 13 bit Resolution (including sign bit)
– Interrupt on Instantaneous Current Conversion Complete
– Programmable Conversion Time: 128/256/512/1024 ms
– 18-bit Resolution (including sign bit)
– Interrupt on Accumulation Current Conversion Complete
– Programmable Sampling Interval: 256/512/1024/2048 ms
– Allowing Measurement of ± 20/40A @ 5 mΩ
PI
NI
Switcher
Polarity
Current Level
Comparator
Regular
Current
Sigma Delta
modulator
IRQ
Instantaneous
Register
Current
ATmega16HVB/32HVB
Decimation
8-BIT DATABUS
Filter
IRQ
Registers
Control &
Status
Decimation
Filter
IRQ
Accumulate
Register
Current
108