MC68HC11KW1 Datasheet, PDF (118/238 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor HCMOS) microcontroller unit

6.5
Port E
Port E is an input-only port. In addition to their input capability, port E pins are shared with A/D
functions, as shown in the following table.
Pin
Alternative
function
PE0
AN2

PE1
AN3


PE2
AN4


PE3
AN5


See Section 10 for
PE4
AN6
 more information.

PE5
AN7


PE6
AN8


6
PE7
AN9

On reset, the pins are configured as general purpose high-impedance inputs.
6.5.1 PORTE — Port E data register
Port E data (PORTE)
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$000A PE7 PE6 PE5 PE4 PE3 PE2 PE1 PE0 undefined
This is a read-only register and is not affected by reset. The bits may be read at any time.
Note:
As port E shares pins with the A/D converter, a read of this register may affect any
conversion currently in progress, if it coincides with the sample portion of the
conversion cycle. Hence, normally port E should not be read during the sample portion
of any conversion.
PARALLEL INPUT/OUTPUT
MC68HC11KW1
6-6