ST7265X View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST7265X

Low speed USB 8-bit MCU family with up to 32 KB Flash/ROM

STMicroelectronics 

ST7265x

PIN DESCRIPTION (Cont’d)

Legend / Abbreviations:

Type: I = input, O = output, S = supply

VDDF powered: I/O powered by the alternate sup-

ply rail, supplied by VDDF and VSSF.

In/Output level: CT = CMOS 0.3VDD/0.7VDD with

input trigger

Output level: HS = High Sink (on N-buffer only)

Port and control configuration:

– Input:float = floating, wpu = weak pull-up, int = in-

terrupt

– Output: OD = open drain, T = true open drain, PP

= push-pull, OP = pull-up enabled by option byte.

Refer to “I/O PORTS” on page 49 for more details

on the software configuration of the I/O ports.

The RESET configuration of each pin is shown in

bold.

Table 1. Device Pin Description

Pin

Level Port / Control

Pin Name

Input

Output

Main

Function

(after reset)

Alternate Function

5 1 1 USBVSS

6 2 2 USBDM

7 3 3 USBDP

8 4 4 USBVCC

9 5 5 USBVDD

10 6 6 VDDF

11 7 7 VSSF

- - 8 PE5/DTC

- - 9 PE6/DTC

- - 10 PE7/DTC

- 8 11 PB0/DTC

- 9 12 PB1/DTC

- 10 13 PB2/DTC

S

I/O

I/O

O

S

SX

SX

I/O X CT HS X2

I/O X CT HS X

I/O X CT HS X

I/O

X

C

T

X

I/O

X

C

T

X

I/O

X

C

T

X

USB Digital ground

USB bidirectional data (data -)

USB bidirectional data (data +)

USB power supply, output by the on-chip USB

3.3V linear regulator.

Note: An external decoupling capacitor (typ.

100nF, min 47nF) must be connected be-

tween this pin and USBVSS.

USB Power supply voltage (4V - 5.5V)

Note: External decoupling capacitors (typ.

4.7µF+100nF, min 2.2µF+100nFmust be con-

nected between this pin and USBVSS.

Power Line for alternate supply rail. Can be

used as input (with external supply) or output

(when using the on-chip voltage regulator).

Note: An external decoupling capacitor (min.

20nF) must be connected to this pin to stabi-

lize the regulator.

Ground Line for alternate supply rail. Can be

used as input (with external supply) or output

(when using the on-chip voltage regulator)

X2 X Port E5

DTC I/O with serial capability

(MMC_CMD)

X X Port E6

DTC I/O with serial capability

(MMC_DAT)

X X Port E7

DTC I/O with serial capability

(MMC_CLK)

X Port B0

DTC

X Port B1

DTC

X Port B2

DTC

10/166

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