AT90S8515-4PI Atmel, AT90S8515-4PI Datasheet - Page 64

• Manufacturer Part Number: AT90S8515-4PI
• Description: IC MCU 8K FLSH 4MHZ LV IT 40DIP
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S8515-4PI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Port A Schematics
64
AT90S8515
PORTAn has to be cleared (zero) or the pin has to be configured as an output pin. The
Port A pins are tri-stated when a reset condition becomes active, even if the clock is not
active..
Table 19. DDAn Effects on Port A Pins
Note:
Note that all port pins are synchronized. The synchronization latch is, however, not
shown in the figure.
Figure 45. Port A Schematic Diagrams (Pins PA0 - PA7)
DDAn
0
0
1
1
n: 7,6…0, pin number.
PORTAn
0
1
0
1
Output
Output
Input
Input
I/O
Pull-up
Yes
No
No
No
Comment
Tri-state (high-Z)
PAn will source current if ext. pulled low.
Push-pull Zero Output
Push-pull One Output
0841G–09/01