XC886/888CLM
Power Supply, Reset and Clock Management
User’s Manual
7-8
V1.3, 2010-02
Power, Reset and Clock, V 1.0
7.2.3
Booting Scheme
When the XC886/888 is reset, it must identify the type of configuration with which to start
the different modes once the reset sequence is complete. Thus, boot configuration
information that is required for activation of special modes and conditions needs to be
applied by the external world through input pins. After power-on reset or hardware reset,
the pins MBC, TMS and P0.0 collectively select the different boot options.
shows the available boot options in the XC886/888.
Note: The boot options are valid only with the default set of UART and JTAG pins.
Table 7-2
XC886/888 Boot Selections
MBC
TMS P0.0
Type of Mode
PC Start Value
1
0
x
User Mode
1)
; on-chip OSC/PLL non-bypassed
1)
For the Flash devices, BSL mode is automatically entered if no valid password is installed and data at memory
address 0000
H
equals zero.
0000
H
0
0
x
BSL Mode; OSC/PLL non-bypassed (normal)
2)
2)
OSC is bypassed in MultiCAN BSL mode.
0000
H
0
1
0
OCDS Mode; on-chip OSC/PLL non-bypassed 0000
H
1
1
0
User (JTAG) Mode
3)
; on-chip OSC/PLL non-
bypassed (normal)
3)
Normal user mode with standard JTAG (TCK,TDI,TDO) pins for hot-attach purpose.
0000
H
*
Содержание XC886CLM
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