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PD44164095B_15 Datasheet, PDF (17/35 Pages) Renesas Technology Corp – 18M-BIT DDR II SRAM SEPARATE I/O 2-WORD BURST OPERATION | |||
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μPD44164095B, μPD44164185B
Read and Write Cycle
Parameter
Clock
Average Clock cycle time
(K, K#, C, C#)
Clock phase jitter (K, K#, C, C#)
Clock HIGH time (K, K#, C, C#)
Clock LOW time (K, K#, C, C#)
Clock HIGH to Clock# HIGH
(K â K#, C â C#)
Clock# HIGH to Clock HIGH
(K# â K, C# â C)
Clock to data clock
(K â C, K# â C#)
PLL lock time (K, C)
K static to PLL reset
Symbol
TKHKH
TKC var
TKHKL
TKLKH
TKHK#H
TK#HKH
TKHCH
TKC lock
TKC reset
-E33, E33Y -E35, E35Y -E40, E40Y -E50, E50Y Unit Note
(300 MHz) (287 MHz) (250 MHz) (200 MHz)
MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.
3.3 8.4 3.5 8.4 4.0 8.4 5.0 8.4 ns 1
0.2
0.2
0.2
0.2 ns 2
1.32
1.5
1.6
2.0
ns
1.32
1.5
1.6
2.0
ns
1.49
1.7
1.8
2.2
ns
1.49
1.7
1.8
2.2
ns
0 1.45 0 1.65 0 1.8 0 2.3 ns
20
20
20
20
μs 3
30
30
30
30
ns 4
Output Times
CQ HIGH to CQ# HIGH
TCQHCQ#H 1.24
1.35
1.55
1.95
ns 5
(CQ â CQ#)
CQ# HIGH to CQ HIGH
TCQ#HCQH 1.24
1.35
1.55
1.95
ns 5
(CQ# â CQ)
C, C# HIGH to output valid
TCHQV
0.45
0.45
0.45
0.45 ns
C, C# HIGH to output hold
TCHQX â0.45
â0.45
â0.45
â0.45
ns
C, C# HIGH to echo clock valid TCHCQV
0.45
0.45
0.45
0.45 ns
C, C# HIGH to echo clock hold TCHCQX â0.45
â0.45
â0.45
â0.45
ns
CQ, CQ# HIGH to output valid TCQHQV
0.27
0.3
0.3
0.35 ns 6
CQ, CQ# HIGH to output hold TCQHQX â0.27
â0.3
â0.3
â0.35
ns 6
C HIGH to output High-Z
TCHQZ
0.45
0.45
0.45
0.45 ns
C HIGH to output Low-Z
TCHQX1 â0.45
â0.45
â0.45
â0.45
ns
Setup Times
Address valid to K rising edge
TAVKH 0.4
0.5
0.5
0.6
Synchronous load input (LD#),
TIVKH
0.4
0.5
0.5
0.6
read write input (R, W#) valid to
K rising edge
Data inputs and write data
TDVKH 0.3
0.35
0.35
0.4
select inputs (BWx#) valid to
K, K# rising edge
ns 7
ns 7
ns 7
Hold Times
K rising edge to address hold
TKHAX 0.4
0.5
0.5
0.6
K rising edge to
TKHIX
0.4
0.5
0.5
0.6
synchronous load input (LD#),
read write input (R, W#) hold
K, K# rising edge to data inputs TKHDX 0.3
0.35
0.35
0.4
and write data select inputs
(BWx#) hold
ns 7
ns 7
ns 7
R10DS0016EJ0200 Rev.2.00
October 6, 2011
Page 17 of 34
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