AT90S8515-8PC Atmel, AT90S8515-8PC Datasheet - Page 72

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

Specifications of AT90S8515-8PC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• 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): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Port C Schematics
Port D
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AT90S8515
Note that all port pins are synchronized. The synchronization latch is, however, not
shown in the figure.
Figure 52. Port C Schematic Diagram (Pins PC0 - PC7)
Port D is an 8-bit bi-directional I/O port with internal pull-up resistors.
Three I/O memory address locations are allocated for the Port D, one each for the Data
Register – PORTD, $12($32), Data Direction Register – DDRD, $11($31) and the Port D
Input Pins – PIND, $10($30). The Port D Input Pins address is read-only, while the Data
Register and the Data Direction Register are read/write.
The Port D output buffers can sink 20 mA. As inputs, Port D pins that are externally
pulled low will source current if the pull-up resistors are activated.
Some Port D pins have alternate functions as shown in Table 23.
Table 23. Port D Pin Alternate Functions
When the pins are used for the alternate function, the DDRD and PORTD registers have
to be set according to the alternate function description.
Port Pin
PD0
PD1
PD2
PD3
PD5
PD6
PD7
Alternate Function
RXD (UART Input Line)
TXD (UART Output Line)
INT0 (External interrupt 0 Input)
INT1 (External interrupt 1 Input)
OC1A (Timer/Counter1 Output CompareA Match Output)
WR
RD
(Read Strobe to External Memory)
(Write Strobe to External Memory)
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