ATA6613 ATMEL Corporation, ATA6613 Datasheet - Page 31

• Manufacturer Part Number: ATA6613
• Description: Ata6613
• Manufacturer: ATMEL Corporation

6.2.3
6.2.4
6.2.4.1
6.2.4.2
6.2.4.3
9111C–AUTO–02/08
Comparison Between ATA6612/ATA6613
Pin Descriptions
VCC
GND
Port B (PB7:0) XTAL1/XTAL2/TOSC1/TOSC2
The ATA6612 and ATA6613 differ only in memory sizes, boot loader support, and interrupt vec-
tor sizes.
devices.
Table 6-1.
ATA6612 and ATA6613 support a real Read-While-Write Self-Programming mechanism. There
is a separate Boot Loader Section, and the SPM instruction can only execute from there.
Digital supply voltage.
Ground.
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.
Depending on the clock selection fuse settings, PB6 can be used as input to the inverting oscil-
lator amplifier.
Depending on the clock selection fuse settings, PB7 can be used as input to the inverting oscil-
lator amplifier.
If the internal calibrated RC oscillator is used as chip clock source, PB7..6 is used as TOSC2..1
input for the asynchronous Timer/Counter2 if the AS2 bit in ASSR is set.
The various special features of Port B are elaborated in
97
and
ATA6612
ATA6613
Device
“System Clock and Clock Options” on page
Table 6-1
Memory Size Summary
summarizes the different memory and interrupt vector sizes for the two
16 Kbytes
8 Kbytes
Flash
512 Bytes
512 Bytes
EEPROM
51.
“Alternate Functions of Port B” on page
1 Kbyte
1 Kbyte
ATA6612/ATA6613
RAM
2 instruction words/vector
1 instruction word/vector
Interrupt Vector Size
31