ST7FSCRDIE View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST7FSCRDIE

8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER

STMicroelectronics 

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ST7SCR

I/O PORTS (Cont’d)

9.3 I/O Port Implementation

The hardware implementation on each I/O port de-

pends on the settings in the DDR register and spe-

cific feature of the I/O port such as true open drain.

9.3.1 Port A

Table 9. Port A Description

PORT A

PA[5:0]

PA6

*Reset State

Input

without pull-up *

without pull-up

I/O

Output

push-pull or open drain with software selectable pull-up

-

Figure 21. PA0, PA1, PA2, PA3, PA4, PA5 Configuration

ALTERNATE 1

OUTPUT

0

ALTERNATE ENABLE

VDD

P-BUFFER

DR

LATCH

DDR

LATCH

DDR SEL

ALTERNATE ENABLE

PULL-UP 1)

VDD

PAD

DR SEL

1

ALTERNATE INPUT

0

N-BUFFER

ALTERNATE ENABLE

VSS

CMOS SCHMITT TRIGGER

DIODES

Note 1: selectable by PAPUCR register

Figure 22. PA6 Configuration

DR SEL

VDD

PAD

CMOS SCHMITT TRIGGER

DIODES

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