The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI ports, CAN, LIN/UART and interrupt system to
continue functioning. The Power-down mode saves the register contents but freezes the Oscillator, disabling all other chip
functions until the next interrupt or Hardware Reset. The ADC noise reduction mode stops the CPU and all I/O modules
except ADC, to minimize switching noise during ADC conversions. In Standby mode, the Crystal/Resonator Oscillator is
running while the rest of the device is sleeping. This allows very fast start-up combined with low power consumption.
The device is manufactured using Atmel’s high-density nonvolatile memory technology. The On-chip ISP Flash allows the
program memory to be reprogrammed in-system through an SPI serial interface, by a conventional nonvolatile memory
programmer, or by an On-chip Boot program running on the AVR core. The boot program can use any interface to download
the application program in the application Flash memory. Software in the boot flash section will continue to run while the
application flash section is updated, providing true read-while-write operation. By combining an 8-bit RISC CPU with in-
system self-programmable flash on a monolithic chip, the Atmel ATmega16/32/64/M1/C1 is a powerful microcontroller that
provides a highly flexible and cost effective solution to many embedded control applications.
The ATmega16/32/64/M1/C1 AVR is supported with a full suite of program and system development tools including: C
compilers, macro assemblers, program debugger/simulators, in-circuit emulators, and evaluation kits.
2.2
Automotive Quality Grade
The Atmel® ATmega16/32/64/M1/C1 have been developed and manufactured according to the most stringent requirements
of the international standard ISO-TS-16949. This data sheet contains limit values extracted from the results of extensive
characterization (Temperature and Voltage). The quality and reliability of the ATmega16/32/64/M1/C1 have been verified
during regular product qualification as per AEC-Q100 grade 1.
As indicated in the ordering information paragraph, the products are available in only one temperature grade.
Table 2-1. Temperature Grade Identification for Automotive Products
Temperature
Temperature Identifier
Comments
–40, +125
Z
Full automotive temperature range
2.3
Pin Descriptions
2.3.1 VCC
Digital supply voltage.
2.3.2 GND
Ground.
2.3.3 Port B (PB7..PB0)
Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port B output buffers have
symmetrical drive characteristics with both high sink and source capability. As inputs, Port B pins that are externally pulled
low will source current if the pull-up resistors are activated. The Port B pins are tri-stated when a reset condition becomes
active, even if the clock is not running.
Port B also serves the functions of various special features of the Atmel ATmega16/32/64/M1/C1 as listed in Section 9.3.2
“Alternate Functions of Port B” on page 58.
2.3.4 Port C (PC7..PC0)
Port C is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port C output buffers have
symmetrical drive characteristics with both high sink and source capability. As inputs, Port C pins that are externally pulled
low will source current if the pull-up resistors are activated. The Port C pins are tri-stated when a reset condition becomes
active, even if the clock is not running.
Port C also serves the functions of special features of the ATmega16/32/64/M1/C1 as listed in Section 9.3.3 “Alternate
Functions of Port C” on page 61.
ATmega16/32/64/M1/C1 [DATASHEET]
9
7647O–AVR–01/15
MICROCHIP [ MICROCHIP ]
