Fujitsu MB2198-130 Setting a External Memory Emulation, Setting the Memory Size Select Switch

Chapter 5 Usage

5.4 Setting a External Memory Emulation

Figure 5.4-1 shows the external memory emulation block diagram, figure 5.4-2 and table 5.4-1 show the set- ting the memory size select switch and the factory settings of the memory size select switch, figure 5.4-3 shows the factory settings of the setting the memory connective switches; Table 5.4-2 lists the memory con- nective switch settings.

■External Memory Emulation Block Diagram

Figure 5.4-1 shows the external memory emulation block diagram.

		Address bus		Flat cable	connector
Evaluation		P4[5:0],P3[7:0],P2[7:1],P5[4]
		Data bus
MCU
		P1[7:0],P0[7:0]
			Memory
			connective
74LVCH16244A
			switches
External-	Y	A
memory		*OE
emulation
		GND
circuit

Adapter board

To header

Figure 5.4-1 External Memory Emulation Block Diagram

■Setting the Memory Size Select Switch

The memory size select switch select the size of the memory board to be connected to use the exter- nal memory emulation function.

Figure 5.4-2 shows the factory settings of the switch; Table 5.4-1 lists the memory board sizes and effective addresses depending on the settings of the switch.

1

2

3

ASEL		SW1
	1 2	ON
	3
	4

Figure 5.4-2 Setting the Memory Size Select Switch (Factory Setting)

Table 5.4-1 The Memory Size Select Switch Settings

ASEL3	ASEL2	ASEL1	Memory board size	Affective addresses
1	1	1	2 MWords	A[21:1]
1	1	0
1	0	1	1 MWords	A[20:1]
1	0	0	512 KWords	A[19:1]
0	1	1	256 KWords	A[18:1]
0	1	0	128 KWords	A[17:1]
0	0	1	64 KWords	A[16:1]
0	0	0	32 KWords	A[15:1]

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