ST10F269 datasheet(73/160 Pages) STMICROELECTRONICS

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ST10F269

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12.7 - Port 4

If this 8-bit port is used for general purpose I/O, the direction of each line can be configured via the

corresponding direction register DP4.

P4 (FFC8h / E4h)

SFR

Reset Value: --00h

DP4 (FFCAh / E5h)

SFR

Reset Value: --00h

For CAN configuration support (see section 15), Port 4 has an open drain function, controlled with the

ODP4 register:

ODP4 (F1CAh / E5h)

ESFR

Reset Value: --00h

Note: Only bit 6 and 7 are implemented, all other bit will be read as “0”.

765

432

P4.7

P4.6

P4.5

P4.4

P4.3

P4.2

P4.1

P4.0

P4.y

Port Data Register P4 Bit y

765

432

DP4.7 DP4.6 DP4.5 DP4.4 DP4.3 DP4.2 DP4.1 DP4.0

DP4.y

Port Direction Register DP4 Bit y

DP4.y = 0: Port line P4.y is an input (high-impedance)

DP4.y = 1: Port line P4.y is an output

---

ODP4.7 ODP4.6

ODP4.y

Port 4 Open Drain Control Register Bit y

ODP4.y = 0: Port line P4.y output driver in push/pull mode

ODP4.y = 1: Port line P4.y output driver in open drain mode if P4.y is not a segment

address line output

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