ATmega406 Atmel Corporation, ATmega406 Datasheet - Page 6

• Manufacturer Part Number: ATmega406
• Manufacturer: Atmel Corporation

Specifications of ATmega406

• Flash (kbytes): 40 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 1 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 18
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -30 to 85
• I/o Supply Class: 4.0 to 25
• Operating Voltage (vcc): 4.0 to 25
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 3
• Pwm Channels: 2
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

2.2.10
2.2.11
2.2.12
2.2.13
2.2.14
2.2.15
2.2.16
2.2.17
2.2.18
2.2.19
2.2.20
6
ATmega406
Port C (PC0)
Port D (PD1:PD0)
SCL
SDA
OC/OD/OPC
PI/NI
PPI/NNI
NV/PV1/PV2/PV3/PV4
PVT
BATT
RESET
Port C is a high voltage Open Drain output port.
Port D is a low-voltage 2-bit bi-directional I/O port with internal pull-up resistors (selected for
each bit). As inputs, Port D pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port D pins are tri-stated when a reset condition becomes active,
even if the clock is not running.
Port D also serves the functions of various special features of the ATmega406 as listed in
nate Functions of Port D” on page
SMBUS clock, Open Drain bidirectional pin.
SMBUS data, Open Drain bidirectional pin.
High voltage output to drive external Charge/Discharge/Pre-charge FETs. For details, see
Control” on page
Unfiltered positive/negative input from external current sense resistor, used by the battery pro-
tection circuit, for over-current and short-circuit detection. For details, see
page
Filtered positive/negative input from external current sense resistor, used to by the Coulomb
Counter ADC to measure charge/discharge currents flowing in the battery pack. For details, see
”Coulomb Counter - Dedicated Fuel Gauging Sigma-delta ADC” on page
NV, PV1, PV2, PV3, and PV4 are the inputs for battery cells 1, 2, 3 and 4, used by the Voltage
ADC to measure each cell voltage. For details, see
pose 12-bit Sigma-Delta ADC” on page
PVT defines the pull-up level for the OD output.
Input for detecting when a charger is connected. This pin also defines the pull-up level for OC
and OPC outputs.
Reset input. A low level on this pin for longer than the minimum pulse length will generate a
reset, even if the clock is not running. The minimum pulse length is given in Table 11 on page
38. Shorter pulses are not guaranteed to generate a reset.
125.
133.
72.
116.
”Voltage ADC – 10-channel General Pur-
”Battery Protection” on
106.
2548ES–AVR–07/06
”Alter-
”FET