AT90S1200 ATMEL Corporation, AT90S1200 Datasheet - Page 35

• Manufacturer Part Number: AT90S1200
• Description: 8-Bit Microcontroller with 1K bytes In-System Programmable Flash
• Manufacturer: ATMEL Corporation

Alternate Functions for Port D
Port D Schematics
0838H–AVR–03/02
Table 11. DDDn Bits’ Effect on Port D Pins
Note:
The alternate functions of Port D are:
• T0 – Port D, Bit 4
T0, Timer/Counter0 clock source. See the timer description for further details.
• INT0 – Port D, Bit 2
INT0, External Interrupt source 0. See the interrupt description for further details.
Note that all port pins are synchronized. The synchronization latches are, however, not
shown in the figures.
Figure 27. Port D Schematic Diagram (Pins PD0, PD1, PD3, PD5, and PD6)
DDDn
0
0
1
1
n: 6…0, pin number.
PORTDn
0
1
0
1
Output
Output
Input
Input
I/O
Pull-up
Yes
No
No
No
Comment
Tri-state (High-Z)
PDn will source current if ext. pulled low.
Push-pull Zero Output
Push-pull One Output
AT90S1200
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