XC886/888CLM
Bootstrap Loader
User’s Manual
18-25
V1.3, 2010-02
Bootstrap Loader, V1.0
18.1.3.9
Fast LIN BSL
Fast LIN BSL is an enhanced feature in XC886/888 device, supporting higher baud rate
up to 115.2KHz. This is higher than Standard LIN, which supports only a baud rate of up
to 20 kHz. This mode is especially useful during back-end programming, where faster
programming time is desirable.
Fast LIN BSL is entered when the last byte of the Mode Data of Command LIN frame is
01
H
(header block for LIN Modes 0, 2 and 8). See
Master Request Header and Command LIN frames are received, the microcontroller will
wait for the Slave Response Header LIN frame before sending back the Response LIN
frame. The host will then send the header block using BSL UART protocol at the
calculated high baud rate. See
. Microcontroller will stay at Fast LIN BSL,
and the communication structure and selection of modes will be like BSL Mode via UART
as shown in
Figure 18-5
Fast LIN BSL Frames
18.1.3.10 After-Reset Conditions
When one or more parameters of the transfer block are invalid, different procedures are
carried out. This also depends on whether the invalid frame is a first frame to be
received.
list the different scenarios in relation to the first frame, Protected
ID, Checksum (LIN or Programming), block type and modes.
8 Data bytes for Command
NAD, Header, Mode, .....,
Fast_Prog
xx
H
, 00
H
, 00
H
/08
H
, xx
H
, xx
H
, xx
H
, xx
H
,
01
H
or
xx
H
, 00
H
, 02
H
, xx
H
, xx
H
, xx
H
, xx
H
,
01
H
SYN
Break
(At least
13 bits
low)
SYN
Char
55
H
Protected
ID
3C
H
Host
LIN BSL
Checksum
(1 byte)
Master Request Header
Command
Slave Response Header
SYN
Break
(At least
13 bits
low)
SYN
Char
55
H
Protected
ID
7D
H
8 Data bytes for Command
NAD, Response (ACK),.....not used…
xx
H
, 55
H
, 00
H
, 00
H
, 00
H
, 00
H
, 00
H
, 00
H
Checksum
(1 byte)
Response
<<<<<<<<<<<<<< BSL UART protocol (Phase II) >>>>>>>>>>>>
Fast LIN BSL
*
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