Release Date:

July, 2002

ds_pl2303_v14

PL-2303 Product Datasheet

- 6 -

Document Revision 1.3

Pin

No.

Name

Type

Description

22

TRI_STATE

I

Tri-State

This pin is referred after reset.

High: RS-232 output inactive during Suspend.

Low: RS-232 output tri-state during Suspend.

23

LD_MD/

SHTD

I/O

Load Mode/SHTD

This pin is input during reset. Pull high with a 220K resistor to

indicate the heavy load USB device (500mA). Pull down with a

220K resistor to indicate the light load USB device 100mA).

After reset, this pin becomes output. It output the inverse of

SHTD_N.

24

VDD_PLL

P

5V power for PLL

25

GND_PLL

P

Ground for PLL

26

PLL_TEST

I

PLL test mode control

27

OSC1

I

Crystal oscillator input

28

OSC2

O

Crystal oscillator output

Type:

I – Input signal

O – Output signal

I/O – Bi-directional signal

P – Power/Ground

Supported Data Formats and Programmable Baud Rate Generator

The PL2303 USB-to-RS232 bridge controller supports versatile data formats and has a programmable baud

rate generator. The supported data formats are shown on Table 2. The programmable baud rate generator

supports baud rates up to 1.2M bps as shown in Table 3.

Table 2. Supported Data Formats

Description

Stop bits

1

1.5

2

Parity type

None

Odd

Even

Mark

Space

Data bits

5, 6, 7, 8, or 16