ST7263BEx datasheet(45/186 Pages) STMICROELECTRONICS

部件名	ST7263BEx

功能描述	Low speed USB 8-bit MCU family with up to 32 KB Flash/ROM, DFU capability, 8-bit ADC, WDG, timer, SCI and I²C

PDF	186 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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45 / 186 page

ST7263Bxx

I/O ports

Doc ID 7516 Rev 8

45/186

9.3

I/O port implementation

The hardware implementation on each I/O port depends on the settings in the DDR register

and specific feature of the I/O port such as ADC input or true open drain.

9.3.1

Port A

Figure 22.

PA0, PA3, PA4, PA5, PA6, PA7 and PD[7:4] configuration

Table 11.

Port A0, A3, A4, A5, A6, A7 description

PORT A

I/Os

Alternate function

Input(1)

Reset state.

Output

Signal

Condition

PA0

with pull-up

push-pull

MCO (Main Clock output)

MCO = 1 (MISCR)

PA3

with pull-up

push-pull

Timer EXTCLK

CC1 =1

CC0 = 1 (Timer CR2)

PA4

with pull-up

Push-pull

Timer ICAP1

IT1 Schmitt triggered input IT1E = 1 (ITIFRE)

PA5

with pull-up

Push-pull

Timer ICAP2

IT2 Schmitt triggered input IT2E = 1 (ITIFRE)

PA6(2)

Not available on SO24

with pull-up

Push-pull

Timer OCMP1

OC1E = 1

IT3 Schmitt triggered input IT3E = 1 (ITIFRE)

PA7

with pull-up

Push-pull

Timer OCMP2

OC2E = 1

IT4 Schmitt triggered input IT4E = 1 (ITIFRE)

DDR

LATCH

DR SEL

DDR SEL

VDD

PAD

ALTERNATE ENABLE

ALTERNATE

ALTERNATE INPUT

PULL-UP

OUTPUT

P-BUFFER

N-BUFFER

CMOS SCHMITT TRIGGER

VSS

VDD

DIODES

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