M65KG256AB

5/51

List of figures

Figure 1.

Logic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 2.

Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 3.

Simplified Command State Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 4.

AC Measurement I/O Waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 5.

AC Measurement Load Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 6.

Consecutive Bank(Row) Activate Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 7.

Read followed by Read in Same Bank and Row . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 8.

Read followed by Read in a Different Bank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 9.

Read with Auto Precharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 10.

Read with Auto Precharge AC Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 11.

Read Operation (Burst Lengths = 2, 4 and 8, CAS Latency = 3) . . . . . . . . . . . . . . . . . . . . 34

Figure 12.

Burst Terminate During Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 13.

Write followed by Write in Same Bank and Row. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 14.

Write followed by Write in a Different Bank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 15.

Write operation with Auto Precharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 16.

Write with Auto Precharge AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 17.

Write Operation (Burst Lengths = 2, 4 and 8, CAS Latency = 1) . . . . . . . . . . . . . . . . . . . . 38

Figure 18.

Byte Write AC Waveforms (Data Masking using LDQM/UDQM) . . . . . . . . . . . . . . . . . . . . 39

Figure 19.

Mode Register/Extended Mode Register Set Commands AC Waveforms . . . . . . . . . . . . . 40

Figure 20.

Read followed by Write using the Burst Read Terminate Command (BST) . . . . . . . . . . . 41

Figure 21.

Write followed by Read (Write Completed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 22.

Write followed by Read in the same Bank and Row (Write Interrupted). . . . . . . . . . . . . . . 43

Figure 23.

Power-Up Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 24.

Auto Refresh Command AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 25.

Self Refresh Entry and Exit Commands AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 26.

Deep Power-Down Entry Command AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 27.

Deep Power-Down Exit AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48