emc643sp16ak Emlsi Inc., emc643sp16ak Datasheet - Page 27

• Manufacturer Part Number: emc643sp16ak
• Description: 4mx16 Bit Cellularram Ad-mux
• Manufacturer: Emlsi Inc.

Figure 17: Latency Counter (Variable Initial Latency, No Refresh Collision)
Table 6: Fixed Latency Configuration Codes
Figure 18: Latency Counter (Fixed Latency)
BCR[13:11]
Others
A/DQ[15:0]
A/DQ[15:0]
A/DQ[15:0]
A/DQ[15:0]
A/DQ[15:0]
010
011
100
101
110
000
A[21:16]
A[21:16]
(WRITE)
(READ)
ADV#
ADV#
CLK
CLK
CE#
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
IH
V
V
V
V
IH
IH
IL
IH
IH
V
V
V
IL
IL
IH
IL
IL
IL
OH
IH
OH
IH
OL
OL
IH
IH
IL
IL
IL
IL
2 (3 clocks)
3 (4 clocks)-default
4 (5 clocks)
5 (6 clocks)
6 (7 clocks)
8 (9 clocks)
Reserved
Configuration
Latency
Address
Address
(ADV# = LOW)
Code
Burst Identified
Valid
Address
Valid
Address
Address
Address
Valid
Valid
Valid
Valid
Code 3 (default)
Code 4
Code 2
t
AADV
t
t
CO
AA
Cycles
N-1
Latency Count (N)
t
ACLK
D0
Cycle N
Normal
Valid
Input
--
2
3
4
5
6
8
D0
D1
Output
Valid
27
t
SP
Valid
Input
D2
D0
D1
t
HD
Output
Valid
D3
D2
D1
104(9.62ns)
Valid
Input
52(19.2ns)
75(13.3ns)
133(7.5ns)
33(30ns)
66(15ns)
133
-
D4
D3
D2
Output
Max Input CLK Frequency (MHz)
Valid
Don’t Care
Valid
Input
4Mx16 CellularRAM AD-MUX
Don’t Care
D5
D4
D3
104(9.62ns)
EMC643SP16AK
52(19.2ns)
75(13.3ns)
33(30ns)
66(15ns)
Output
Valid
D5
D4
D6
104
-
-
Input
Valid
D7
D6
D5
Undefined
Undefined
Output
Valid
Valid
Input
D6
52(19.2ns)
75(13.3ns)
D7
33(30ns)
66(15ns)
83(12ns)
83
-
-