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Application Note 1165
address (at bank 0, address 0) contains the device
configuration when it is powered up. When an ISL6296 is
shipped from the factory, the DCFG is set to the value given
in Table 1. Users can always start with the default
configuration. Once the two ends can communicate properly,
the user can start using the tools. Most parts of the
evaluation software only address device ‘0’. If the device
address is not ‘0’, the user needs to use the XSD Access tab
to change the address to ‘0’. Appendix D provides the
techniques if using the default configuration could not make
the PC and the ISL6296 communicate properly.
TABLE 1. DCFG DEFAULT VALUE WHEN SHIPPED FROM
FACTORY
FIGURE 2. “A break is received” POP-UP MESSAGE
NAME
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
Value
0
0
0
1
1
1
0
0
FIGURE 3. “Read register failed” POP-UP MESSAGE
Function
DAB[1:0]
SPD[1:0]
eINT ASLP
SLO[1:0]
Pop-Up Messages
Under certain conditions, the software pops up an error
message to indicate to the user that an error just happened.
Another possible pop-up message shows up when the user
tries to write to the Default Configuration (DCFG) address.
This section explains all the possible pop-up messages.
A BREAK IS RECEIVED
The ISL6296 sends a ‘break’ signal to the host when any
error happens. When the interface receives a ‘break’ signal,
it notices the PC software to pop-up the “A break is received”
message, as shown in Figure 2. Usually when a ‘break’
signal is received, the host needs to try to read the status
register to find the type of error as well as to clear the error.
READ REGISTER FAILED
When the host tries to read a register in the ISL6296 and did
not receive the correct data within a time limit, the host pops
up the “Read register failed” message, as shown in Figure 3.
SEND XSD COMMAND FAILED
This message, as shown in Figure 4, pops up when the PC
software tries to send the XSD command but fails.
WRITE TO USB BUS FAILED
The message in Figure 5 shows up when the PC fails to
communicate with the USB device (the interface board).
WRITE CONFIRMATION
Writing to the default configuration address can potentially
change the device address, XSD bus speed, interrupt and
auto-sleep configuration, or lockout the secret addresses. In
order to prevent the user from changing the default
configuration by accident, the software pops up the message
shown in Figure 6 to ask for confirmation. The DCFG value
will be changed when the user clicks “Yes”.
2
FIGURE 4. “Send XSD command failed” POP-UP MESSAGE
FIGURE 5. “Write to USB bus failed” POP-UP MESSAGE
FIGURE 6. “Write Confirmation” POP-UP MESSAGE
AN1165.1
July 14, 2009
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