Datasheet

ADuC845/ADuC847/ADuC848 Data Sheet
Rev. C | Page 14 of 108
Pin No:
52-MQFP
Pin No:
56-LFCSP Mnemonic Type
1
Description
43–46,
49–52
46–49, 52–
55
P0.0–P0.7 I/O
These pins are part of Port 0, which is an 8-bit open-drain bidirectional I/O
port. Port 0 pins that have 1s written to them float, and, in that state, can be
used as high impedance inputs. An external pull-up resistor is required on P0
outputs to force a valid logic high level externally. Port 0 is also the
multiplexed low-order address and data bus during accesses to external data
memory. In this application, Port 0 uses strong internal pull-ups when
emitting 1s.
EP EPAD Exposed Pad. For the LFCSP, the exposed paddle must be left unconnected.
1
I = input, O = output, S = supply.