User`s manual

Am186
TM
CC Microcontroller ISDN TA Reference Design Manual
2-15
To boot from the TIP board, the Am186CC microcontroller must be reset in x8
boot mode, and the UCS signal must be routed to the TIP Flash memory. The x8
boot is accomplished by using JP2 to pull the MCS0# signal to ground during reset
(see Figure 2-11). To route the UCS signal to the TIP Flash memory, remove the
jumper on JP1 and install the jumper on the TIP. When booting from the on-board
Flash memory, use only JP1; this routes UCS to the ISDN TA Flash memory.
Figure 2-11. Flash Memory Jumper for x8 Boot (JP2)
To boot from the TIP Flash memory, perform the following:
• Disconnect UCS from on board Flash memory (remove JP1).
• Route UCS to the TIP Flash memory (install UCS jumper on TIP).
• Boot in x8 mode (install JP2).
To boot from on-board Flash memory, perform the following:
• Route UCS to the on board Flash memory (install JP1).
• Boot in x16 mode (remove JP2).
A corrupted Flash memory on the main board can be restored by booting from the
TIP board, entering the Z command, changing the jumpers to the settings for
booting from the main board, then following the prompts from the Z command.
TP_TERM
JP2
HEADER 2
1
2
R38
10K
MCS0#
about.book Page 15 Friday, December 18, 1998 9:41 AM