ST52F510 datasheet(54/106 Pages) STMICROELECTRONICS

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ST52F510/F513/F514

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1: Port C pin with pull-up

Port C Option Register (PORT_C_OR)

Configuration Register 33 (021h) Read/Write

Reset Value: 0000 0000 (00h)

Note: This register is not used in 16/20 pin devices

Bit 7-6: Not Used

Bit 5-0: ORC5-0 Port C option (see Table 7.1)

Port C Data Direction Register (PORT_C_DDR)

Configuration Register 34 (022h) Read/Write

Reset Value: 0000 0000 (00h)

Note: This register is not used in 16/20 pin devices

Bit 7-6: Not Used

Bit 5-0: DDRC5-0 Port C direction (see Table 7.1)

0: Port C pin configured as input

1: Port C pin configured as output

Note: in order to achieve low current consuption,

the port pins must be configured as input pull-up,

even though they are not existing in the package.

For example in 20 pin devices, the pins PB6-7 and

PC0-7 must be configured in input pull-up.

Port C Alternate Fuction (PORT_C_AF)

Configuration Register 35 (023h) Read/Write

Reset Value: 0000 0000 (00h)

Bit 7-6: Not Used

Bit 5: AFC5 Alternate Function PC5

0: Digital I/O

1: TRES

Bit 4: AFC4 Alternate Function PC4

0: Digital I/O

1: TX

Bit 3: AFC3 Alternate Function PC3

0: Digital I/O

1: SS

Bit 2: AFC2 Alternate Function PC2

0: Digital I/O

1: MISO

Bit 1: AFC1 Alternate Function PC1

0: Digital I/O

1: MOSI

Bit 0: AFC0 Alternate Function PC0

0: Digital I/O

1: SCK

7.6.2 Input Registers.

Port A Data Input Register (PORT_A_IN)

Input Register 0 (00h) Read only

Reset Value: XXXX XXXX

Bit 7-0: PAI7-0 Port A Input data

The logical level applied in the Port A pins,

configured as digital input, can be achieved by

reading this register.

Port B Data Input Register (PORT_B_IN)

Input Register 1 (01h) Read only

Reset Value: XXXX XXXX

(*) Not used in 16/20 pin package devices

(**) Not used in 16 pin package devices

ORC5

ORC4

ORC3

ORC2

ORC1

ORC0

DDRC5

DDRC4

DDRC3

DDRC2

DDRC1

DDRC0

AFC5

AFC4

AFC3

AFC2

AFC1

AFC0

PAI7

PAI6

PAI5

PAI4

PAI3

PAI2

PAI1

PAI0

PBI7*

PBI6*

PBI5**

PBI4**

PBI3**

PBI2**

PBI1

PBI0

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