Motorola M68EZ328ADS Flash Memory, M68VZ328ADS v2.0 Default Memory Map, MC68EZ328

Freescale Semiconductor, Inc.

ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. 2005

Freescale Semiconductor, Inc.

Hardware Description and Board Operation

3.6 MEMORY

M68EZ328ADS v2.0 provides on-board Flash memory and EDO DRAM, for application development. TheyARCHIVEDcan be enabledBY FREESCALEor disabledSEMICONDUCTOR,individually by settingINC. the2005corresponding DIP switches.

3.6.1 Memory Map

The default memory map of M68EZ328ADS v2.0 in normal mode is shown in Table 3-5.The chip select range to all of the memory are software programmable. Users can reconfigure the memory map for their applications.

Table 3-5. M68VZ328ADS v2.0 Default Memory Map

System Address	Memory	Assigned Chip Select
$00000000-$007FFFFF	8MB EDO DRAM	CSD0
$00800000-$009FFFFF	2MB FLASH BANK0	CSA0
$00A00000-$00BFFFFF	2MB FLASH BANK1	CSA1
$00C00000-$00FBFFFF	Unused	-
$FFFC0000-$FFFCFFFF	EMU Monitor	EMUCS
$FFFD0000-$FFFDFFFF	Debug Port	EMUCS
$FFFFF000-$FFFFFFFF	MC68EZ328 Internal Register	-

3.6.2 FLASH Memory

VCC VCC

MC68EZ328

			1MX16-Bit FLASH
	S2-2
CSA1
		CE

		S2-1				1MX16-Bit FLASH
CSA0
				CE
			A[0..19]
A[1..20]
D[0..15]					D[0..15]
	OE
					OE			FLASH1
	WE				WE
							FLASH0

Figure 3-2. Interface of Flash Memories

M68EZ328ADS v2.0 supports up to two 2M-byte Flash memory chips. However, only one bank is installed when the board is shipped out from the factory. Figure 3-2.shows the inter- face of them. They are chip-selected by *CSA0 and *CSA1 signals. The connection of these *CSAx signals to the Flash memories is controlled by DIP switches S2-1 and S2-2.

3-19M68EZ328ADS v2.0 USER’S MANUALMOTOROLA

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