ATMEGA164A_11 ATMEL [ATMEL Corporation], ATMEGA164A_11 Datasheet - Page 7

• Manufacturer Part Number: ATMEGA164A_11
• Description: 8-bit Atmel Microcontroller with 16/32/64/128K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

2.2
Table 2-1.
2.3
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
8272CS–AVR–06/11
Device
ATmega164A
ATmega164PA
ATmega324A
ATmega324PA
ATmega644A
ATmega644PA
ATmega1284
ATmega1284P
Comparison Between ATmega164A, ATmega164PA, ATmega324A, ATmega324PA,
ATmega644A, ATmega644PA, ATmega1284 and ATmega1284P
Pin Descriptions
VCC
GND
Port A (PA7:PA0)
Port B (PB7:PB0)
Port C (PC7:PC0)
Differences between ATmega164A, ATmega164PA, ATmega324A, ATmega324PA, ATmega644A,
ATmega644PA, ATmega1284 and ATmega1284P
Flash
16 K
16 K
32 K
32 K
64 K
64 K
128 K
128 K
Digital supply voltage.
Ground.
Port A serves as analog inputs to the Analog-to-digital Converter.
Port A also serves as an 8-bit bi-directional I/O port with internal pull-up resistors (selected for
each bit). The Port A output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port A pins that are externally pulled low will source current if
the pull-up resistors are activated. The Port A pins are tri-stated when a reset condition becomes
active, even if the clock is not running.
P o r t A a l s o s e r v e s t h e f u n c t i o n s o f v a r i o u s s p e c i a l f e a t u r e s o f t h e
ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P as listed on
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.
P o r t B a l s o s e r v e s t h e f u n c t i o n s o f v a r i o u s s p e c i a l f e a t u r e s o f t h e
ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P as listed on
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
ATmega164A/PA/324A/PA/644A/PA/1284/P
EEPROM
512
512
1 K
1 K
2 K
2 K
4 K
4 K
RAM
1 K
1 K
2 K
2 K
4 K
4 K
16 K
16 K
Units
bytes
page
page
80.
82.
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