Cermetek Microelectronics, Inc Page 8 of 42
Document NO. 607-00xx Revision A (12/13)
Table 4: Evaluation Kit Interface Description:
1.3. Hardware Reference Design
1.3.1. Hardware Typical Application
Figure 5: CH232BGN Hardware Typical Application
Notes
：
nRST
is an
active low input serving as the
CH232BGN hardware reset signal. The signal
includes a 100K Ohm pull-up resister. This signal must be asserted for at least 300
milliseconds when power is initially applied to the module.
nReady
is an active low output that signals that the module has completed its initial boot
sequence and is ready for use.
This signal includes an internal 4.7K Ohm pull-up resister.
The module provides a low output or a square wave output after normal boot up.
Function
Name
Description
External
Interface
DB9
Male 9pin serial jack
RJ-45
100M Eth Interface
Mini USB
B
－
type interface,AS 5v@1A power input port
Module
2x7 2mm DIP connector
LED
Power (Red)
3.3V Power Indicator
CTS (Green 1)
CTS/GPIO Indicator
RTS (Green 2)
RTS/GPIO Indicator
Reload (Green 3)
nReload/GPIO Indicator
Ready(Green 4)
nReady/GPIO Indicator
Link(Green 5)
NLink/GPIO Indicator
Button
Reset
Used to reset the module.
Reload
Module restored to factory default configuration.
