PL-2303 ETC, PL-2303 Datasheet - Page 7

• Manufacturer Part Number: PL-2303
• Description: PL-2303 USB to RS-232 Bridge Controller
• Manufacturer: ETC

External EEPROM and Device Configuration
PL-2303 allows storing the configuration data in an external EEPROM. After reset, the first two bytes of
EEPROM are checked. If the value is 067Bh, the EEPROM is valid and the contents of the EEPROM are
loaded as the chip’s default parameters. Otherwise, the chip’s default setting is used. The content of
EEPROM is shown in Table 4 below.
The Device Configuration Register is used to control some vendor-specific functions. The meaning of each
bit in Device Configuration Register is shown in Table 5. Reserved and unused pins always set to the default
value.
PL-2303 Product Datasheet
Bytes
10:8
1:0
3:2
5:4
7:6
EECHK
Name
DCR
VID
PID
RN
When the EEPROM is programmed, these two bytes is configured as 067B.
After reset, they will be checked for the value. If matched, the following
information will be loaded as the default parameters.
USB Vendor ID
Product ID
Release number (BCD)
Device Configuration Register
dwDTERate
0012C000h
0001C200h
00001C20h
000012C0h
0000012Ch
000E1000h
0000E100h
00004B00h
00000E10h
000004B0h
0000004Bh
00096000h
00070800h
00038400h
00009600h
00007080h
00003840h
00002580h
00000960h
00000708h
00000258h
00000096h
Table 3. Baud Rate Setting
Table 4. EEPROM Content
- 7 -
Baud Rate
1228800
Description
921600
614400
460800
230400
115200
57600
38400
28800
19200
14400
9600
7200
4800
3600
2400
1800
1200
600
300
150
75
Document Revision 1.3
ds_pl2303_v14
Release Date:
July, 2002