ATMEGA162L-8MC Atmel, ATMEGA162L-8MC Datasheet - Page 231

• Manufacturer Part Number: ATMEGA162L-8MC
• Description: IC MCU AVR 16K 3V 8MHZ 44-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA162L-8MC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-VQFN Exposed Pad
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Latching of Fuses
Signature Bytes
Calibration Byte
Parallel Programming
Parameters, Pin
Mapping, and
Commands
Signal Names
2513C–AVR–09/02
The Fuse values are latched when the device enters Programming mode and changes
of the Fuse values will have no effect until the part leaves Programming mode. This
does not apply to the EESAVE Fuse which will take effect once it is programmed. The
Fuses are also latched on Power-up in Normal mode.
All Atmel microcontrollers have a 3-byte signature code which identifies the device. This
code can be read in both Serial and Parallel mode, also when the device is locked. The
three bytes reside in a separate address space.
For the ATmega162 the signature bytes are:
1. 0x000: 0x1E (indicates manufactured by Atmel).
2. 0x001: 0x94 (indicates 16KB Flash memory).
3. 0x002: 0x04 (indicates ATmega162 device when 0x001 is 0x94).
The ATmega162 has a one-byte calibration value for the internal RC Oscillator. This
byte resides in the high byte of address 0x000 in the signature address space. During
Reset, this byte is automatically written into the OSCCAL Register to ensure correct fre-
quency of the calibrated RC Oscillator.
This section describes how to parallel program and verify Flash Program memory,
EEPROM Data memory, Memory Lock bits, and Fuse bits in the ATmega162. Pulses
are assumed to be at least 250 ns unless otherwise noted.
In this section, some pins of the ATmega162 are referenced by signal names describing
their functionality during parallel programming, see Figure 96 and Table 102. Pins not
described in the following table are referenced by pin names.
The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a posi-
tive pulse. The bit coding is shown in Table 104.
When pulsing WR or OE, the command loaded determines the action executed. The dif-
ferent Commands are shown in Table 105.
Figure 96. Parallel Programming
RDY/BSY
PAGEL
+12 V
BS2
BS1
XA0
XA1
WR
OE
PD1
PD2
PD3
PD4
PD5
PD6
PD7
RESET
XTAL1
GND
PA0
PB7 - PB0
VCC
ATmega162(V/U/L)
+5V
DATA
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