Specifications

50
3706C–MICRO–2/11
AT89LP3240/6440
P1.2 P1M0.2 P1M1.2
SDA open-drain
GPI2
P1.3 P1M0.3 P1M1.3
SCL open-drain
GPI3
P1.4 P1M0.4 P1M1.4
SS
GPI4
P1.5 P1M0.5 P1M1.5
MOSI
GPI5
P1.6 P1M0.6 P1M1.6
MISO
GPI6
P1.7 P1M0.7 P1M1.7
SCK
GPI7
P2.0 P2M0.0 P2M1.0 CCA
P2.1 P2M0.1 P2M1.1 CCB
P2.2 P2M0.2 P2M1.2
CCC
DA+ input-only
P2.3 P2M0.3 P2M1.3
CCD
DA- input-only
P2.4 P2M0.4 P2M1.4 AIN0 input-only
P2.5 P2M0.5 P2M1.5 AIN1 input-only
P2.6 P2M0.6 P2M1.6 AIN2 input-only
P2.7 P2M0.7 P2M1.7 AIN3 input-only
P3.0 P3M0.0 P3M1.0 RXD
P3.1 P3M0.1 P3M1.1 TXD
P3.2 P3M0.2 P3M1.2 INT0
P3.3 P3M0.3 P3M1.3 INT1
P3.4 P3M0.4 P3M1.4 T0
P3.5 P3M0.5 P3M1.5 T1
P3.6 P3M0.6 P3M1.6 WR
P3.7 P3M0.7 P3M1.7 RD
P4.2 P3M0.5 P3M1.5 RST RST must be disabled to use P4.2
P4.6 not configurable CMPA Pin is tied to comparator output
P4.7 not configurable CMPB Pin is tied to comparator output
Table 10-6. Port Pin Alternate Functions
Port Pin
Configuration Bits
Alternate
Function NotesPxM0.y PxM1.y