USB-IK01 User‟s Manual
12
5. Test
Connect the cables (RS232, USB) as shown in [Figure 4-1]. At this time, there is no need to connect
the printer cable when EPLD program is not executed.
5-1 Ready To Test
If the communication program comm.exe is used for the test, the setting values are 38400bps,
8bit, No parity, 1 stop bit. First, set the DIP switch required for the test. The setting contents of
the DIP switch are as shown in [Table 1.]. (Please refer to the VHDL source for details.)
(Note) Since the contents of EPLD can be modified by the user, the contents of the DIP
switch below can be changed according to the user program.
[Table 1.]
Switch
No
Description
Remark
1
It is connected to the input port (bit7) of PCF 8574, and
when it is “ON”, reading the input of 8574 reads „0‟.
2
When “ON”, select 16-bit address serial EEPROM to read
VID and PID from EEPROM. For 24LC64, it is a 16-bit
address EEPROM. In case of “OFF”, EZ-USB core
recognizes that there is no serial EEPROM (except
24LC00)
3
When “ON” as Memory Mode Bit0, it is „0‟
4
When “ON” with Memory Mode Bit1, it is „0‟
When MM is “00”
No external memory is used. That is, only the internal 8Kbyte RAM is used.
When MM is “01”
Uses only external RAM.
When MM is “10”
It uses external RAM and ROM. RAM address 0x0000, ROM address 0x8000
When MM is “11”
It uses external RAM and ROM.
EA (External Access) pin is „1‟, that is, the program is read from external ROM.
ROM address 0x0000, RAM address 0x8000
