ST10F280_12 datasheet(138/239 Pages) STMICROELECTRONICS

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Parallel ports

ST10F280

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Doc ID 8673 Rev. 3

12.12

XPort 10

The XPort10 is enabled by setting XPEN bit 2 of the SYSCON register and bit 3 of the new

XPERCON register. On the XBUS interface, the register are not bit-addressable. This 16-bit

input port can only read data. There is no output latch and no direction register. Data written

to XP10 will be lost.

XP10

Address:

0xC380h

Reset:

0xXXXXh

Type:

12.12.1

Alternate functions of XPort 10

Each line of XPort 10 is also connected to one of the multiplexer of the Analog/Digital

Converter. All port lines (XP10.15...XP10.0) can accept analog signals (AN31...AN16) that

can be converted by the ADC. No special programming is required for pins that shall be

used as analog inputs. The Table 25 summarizes the alternate functions of XPort 10.

RRR

XP10.y Port data register XP10 bit y (Read only)

Table 25.

XPort 10 alternate functions

XPort 10 Pin

Alternate function

P10.0

P10.1

P10.2

P10.3

P10.4

P10.5

P10.6

P10.7

P10.8

P10.9

P10.10

P10.11

P10.12

P10.13

P10.14

P10.15

Analog Input AN16

Analog Input AN17

Analog Input AN18

Analog Input AN19

Analog Input AN20

Analog Input AN21

Analog Input AN22

Analog Input AN23

Analog Input AN24

Analog Input AN25

Analog Input AN26

Analog Input AN27

Analog Input AN28

Analog Input AN29

Analog Input AN30

Analog Input AN31

ST10F280 Datasheet(PDF) 138 Page - STMicroelectronics

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