AT90S8515

Manufacturer Part NumberAT90S8515
Description8-bit microcontroller with 8K bytes in-system programmable flash, 2.7-6.0V
ManufacturerATMEL Corporation
AT90S8515 datasheet
 
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Page 67/112:

Port B Schematics

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Port B Schematics

0841G–09/01
• AIN0 – Port B, Bit 2
AIN0: Analog Comparator Positive Input. When configured as an input (DDB2 is cleared
[zero]) and with the internal MOS pull-up resistor switched off (PB2 is cleared [zero]),
this pin also serves as the positive input of the On-chip Analog Comparator.
• T1 – Port B, Bit 1
T1: Timer/Counter1 counter source. See the timer description for further details
• T0 – Port B, Bit 0
T0: Timer/Counter0 counter source. See the timer description for further details.
Note that all port pins are synchronized. The synchronization latches are, however, not
shown in the figures.
Figure 46. Port B Schematic Diagram (Pins PB0 and PB1)
MOS
PULL-
UP
PBn
WP:
WRITE PORTB
WD:
WRITE DDRB
RL:
READ PORTB LATCH
RP:
READ PORTB PIN
RD:
READ DDRB
n:
0,1
AT90S8515
RD
RESET
R
Q
D
DDBn
C
WD
RESET
R
Q
D
PORTBn
C
RL
WP
RP
TIMERn CLOCK
SENSE CONTROL
SOURCE MUX
CSn0
CSn2
CSn1
67