Smc Default Memory Widths; Table 7-18. Smc System Reset Default Memory Width - Sharp Blue Treak LH75400 User Manual

LH75400/01/10/11 (Preliminary) User's Guide

7.3.3 SMC Default Memory Widths

At System Reset, the memory bank default external memory width is as shown in Table 7-18.
Bank 0 can default to either 8 or 16 bits, depending on whether pin PD2/INT2 is HIGH or
LOW at reset.
• If PD2/INT2 is pulled HIGH on reset, Bank 0 defaults to a 16-bit memory width.
• If PD2/INT2 is pulled LOW on reset, Bank 0 defaults to an 8-bit memory width.
Pin PD2/INT2 has an internal pull-up resistor that selects Bank 0 to be 16-bit, unless an
external pull-down resistor is used on that pin.
NOTE: If PD2/INT2 is LOW while in a Power Down Mode, the internal pull-up resistor will have a DC current

Table 7-18. SMC System Reset Default Memory Width

SMC MEMORY
BANK
Bank 0
Bank 1
Bank 2
Bank 3
path and deplete the battery.
DEFAULT MEMORY WIDTH
Determined by the state of PD2/INT2 at Reset.
16-bit
16-bit
16-bit
6/17/03
Static Memory Controller
7-21