Datasheet

C515C
Data Sheet 13 2003-02
V
DDEXT
50 – Supply voltage for external access pins
This pin is used for power supply of the I/O ports and
control signals which are used during external
accesses (for Port 0, Port 2, ALE, PSEN
, P3.6/WR,
and P3.7/RD
).
V
SSEXT
51 – Ground (0 V) for external access pins
This pin is used for the ground connection of the I/O
ports and control signals which are used during
external accesses (for Port 0, Port 2, ALE, PSEN
,
P3.6/WR
, and P3.7/RD).
N.C. 2, 71 – Not connected
These pins should not be connected.
1)
I = Input; O = Output
Table 2 Pin Definitions and Functions (cont’d)
Symbol Pin Number I/O
1)
Function
P-MQFP-80-1