Motorola MVME2400 manual PPC Bus to ROM/Flash Access Timing 50ns @ 100MHz

Block Diagram

Table 3-12. PPC Bus to ROM/Flash Access Timing (50ns @ 100MHz)

		CLOCK PERIODS REQUIRED FOR:							Total
									Clocks
ACCESS TYPE	1st Beat		2nd Beat		3rd Beat		4th Beat
	16	64	16	64	16	64	16	64	16	64
	Bits	Bits	Bits	Bits	Bits	Bits	Bits	Bits	Bits	Bits
4-Beat Read	42	15	36	9	36	9	36	9	150	42
4-Beat Write	N/A								N/A
1-Beat Read (1 byte)	15	15	-	-	-	-	-	-	15	15
1-Beat Read (2 to 8 bytes)	42	15	-	-	-	-	-	-	42	15
1-Beat Write	21	21	-	-	-	-	-	-	21	21

Note: The information in Table 3-12 is appropriate when configured with devices with an access time equal to 5 CLK periods.

Table 3-13. PPC Bus to ROM/Flash Access Timing (30ns @ 100MHz)

		CLOCK PERIODS REQUIRED FOR:							Total
ACCESS TYPE	1st Beat		2nd Beat		3rd Beat		4th Beat		Clocks
	16	64	16	64	16	64	16	64	16	64
	Bits	Bits	Bits	Bits	Bits	Bits	Bits	Bits	Bits	Bits
4-Beat Read	34	13	28	7	28	7	28	7	118	34
4-Beat Write	N/A								N/A
1-Beat Read (1 byte)	13	13	-	-	-	-	-	-	13	13
1-Beat Read (2 to 8 bytes)	34	13	-	-	-	-	-	-	34	13
1-Beat Write	21	21	-	-	-	-	-	-	21	21

Note: The information in Table 3-13 is appropriate when configured with devices with an access time equal to 3 CLK periods.

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