User`s guide

B.10 Flash ROM Access

The ﬂash ROM can be viewed as two banks of 512KB each. At power-up

the lower 512KB bank is accessed using the address range 86.FFF8.0000 to

86.FFFF.FFFF.

Setting address bit 19 (ﬂash_adr19) allows you to access the higher 512KB

of ﬂash ROM. Write a 1 to the register at address 0x800 to set address bit 19.

Manually deposit a 1 to address 0x800 or enter the following command from

the debug monitor:

> wb 800 1

The address range for the higher bank is 86.FFF8.0000 to 86.FFFF.FFFF, the

same as for the lower bank. Access is now to the higher bank and will continue

until the EB164 is reset, ora0iswritten to the register at address 0x800.

Note

The write-enable jumper must be installed at J14—2/3 (see Figure 2–1

and Figure 2–2). This enables writing to the ﬂash ROM.

SROM Initialization B–15