at90ls8535-8mi ATMEL Corporation, at90ls8535-8mi Datasheet - Page 85

• Manufacturer Part Number: at90ls8535-8mi
• Description: 8-bit Microcontroller With 8k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

Alternate Functions of Port C
Port C Schematics
1041H–11/01
When the AS2 bit in ASSR is set (one) to enable asynchronous clocking of
Timer/Counter2, pins PC6 and PC7 are disconnected from the port. In this mode, a
crystal oscillator is connected to the pins and the pins cannot be used as I/O pins.
Note that all port pins are synchronized. The synchronization latch is, however, not
shown in the figure.
Figure 58. Port C Schematic Diagram (Pins PC0 - PC5)
Figure 59. Port C Schematic Diagram (Pins PC6)
WP:
WD:
RL:
RP:
RD:
AS2:
WRITE PORTC
WRITE DDRC
READ PORTC LATCH
READ PORTC PIN
READ DDRC
ASYNCH SELECT T/C2
PCn
PC6
MOS
PULL-
UP
WP:
WD:
RL:
RP:
RD:
n:
MOS
PULL-
UP
WRITE PORTC
WRITE DDRC
READ PORTC LATCH
READ PORTC PIN
READ DDRC
0-5
RL
RP
RL
RP
AT90S/LS8535
Q
Q
PORTCn
RESET
RESET
DDCn
Q
Q
WD
WP
RD
PORTC6
R
C
R
C
RESET
RESET
DDC6
RD
WD
WP
R
C
R
C
D
D
D
D
AS2
T/C2 OSC
AMP INPUT
85