ST10R172LT6 datasheet(10/68 Pages) STMICROELECTRONICS

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ST10R172L - PIN DESCRIPTION

P2.8 –

P2.11

90 - 93

I/O

Port 2 is a 4-bit bidirectional I/O port. It is bit-wise programma-

ble for input or output via direction bits. For a pin configured as

input, the output driver is put into high-impedance state. Port 2

outputs can be configured as push/pull or open drain drivers.

The following Port 2 pins have alternate functions:

P2.8

EX0IN

Fast External Interrupt 0 Input

...

P2.11

EX3IN

Fast External Interrupt 3 Input

P7.0 –

P7.3

94 - 97

I/O

Port 7 is a 4-bit bidirectional I/O port. It is bit-wise programma-

ble for input or output via direction bits. For a pin configured as

input, the output driver is put into high-impedance state. Port

7outputs can be configured as push/pull or open drain drivers.

The following Port 7 pins have alternate functions:

P7.3

POUT3

PWM (Channel 3) Output

RPD

I/O

Input timing pin for the return from powerdown circuit and

power-up asynchronous reset.

VDD

7, 28,

38, 49,

69, 78

Digital supply voltage.

VSS

4, 27,

39, 50,

70, 77

Digital ground.

1) The following I/O kinds are used.

Refer to ELECTRICAL CHARACTERISTICS on

page 31 for a detailed description.

PO: Power pin

3T: 3 V tolerant pin (voltage max. respect to Vss is -0.5 to VDD + 0.5)

5V: 5 V tolerant pin (voltage max. respect to Vss is -0.5 to 5.5 only if chip is powered)

5S: 5 V tolerant and fail-safe pin (-0.5-5.5 max. voltage w.r.t. Vss even if chip is not pow-

ered).

Table 1 Pin definitions

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