Data Sheet

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