XC886/888CLM
Bootstrap Loader
User’s Manual
18-27
V1.3, 2010-02
Bootstrap Loader, V1.0
18.1.3.11 User Defined Parameter for LIN BSL
The NAD (Node Address for Diagnostic) value, which specifies the address of the active
slave node for the LIN modes, is programmed into the uppermost P-Flash bank pair. This
parameter is specified by the user.
There are two cases to consider when reading the programmed value: one, when the
Flash is unprotected; and the other, when the Flash is protected.
When Flash is not protected, user needs to program the NAD in the format shown in
. To ensure the validity of the parameter, the inverted NAD value is required
to be programmed together with the actual value. If an invalid NAD is programmed, the
default NAD value is assumed.
When Flash is protected, the least significant bit (LSB) of the user password determines
the NAD value used by the device. When LSB of the password is 0, the default broadcast
NAD is used. When LSB of the user password is 1, user needs to program the NAD in
the format shown in
.
Table 18-7
User Defined Parameters in relation with Unprotected Flash
Address
1)
1)
The address shown in the table assumes a device with 24 Kbytes of P-Flash. For variants with smaller P-Flash
sizes, the address used will be the address of the uppermost P-Flash bank plus the offset. For example, a
20 Kbytes Flash variant will have the NAD address at 4FFE
H
.
User Defined Value
Criteria / Range
Default
5FFE
H
NAD
01
H
– 0FF
H
(00
H
is reserved)
7F
H
5FFF
H
NAD
-
-
Table 18-8
User Defined Parameters in relation with Flash Protection Mode
LSB of User
Password
Parameter/
Instruction
Value
Requirement
Address
1)
1)
The address shown in the table assumes a device with 24 Kbytes of P-Flash. For variants with smaller P-Flash
sizes, the address used will be the address of the uppermost P-Flash bank plus the offset. For example, a
20 Kbytes Flash variant will have the NAD address at 4FFC
H
.
Criteria/ Range
0
NAD
7F
H
(Default)
Not Applicable
1
Mov R7, #XX
H
7F
H
5FFB
H
01
H
– 0FF
H
(00
H
is reserved)
NAD
01
H
– 0FF
H
5FFC
H
01
H
– 0FF
H
(00
H
is reserved)
RET
22
H
5FFD
H
-
*
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