参数资料
型号: EWIXP455ABT
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 266 MHz, RISC PROCESSOR, PBGA544
封装: LEAD FREE, PLASTIC, BGA-544
文件页数: 47/163页
文件大小: 1123K
代理商: EWIXP455ABT
Electrical Specifications
May 2005
Intel IXP45X and Intel IXP46X Product Line of Network Processors Datasheet
140
Document Number: 306261-002
5.6.2.7
Expansion Bus
5.6.2.7.1
Expansion Bus Synchronous Operation
Figure 32.
Expansion Bus Synchronous Timing
Table 65.
Expansion Bus Synchronous Operation Timing Values
Symbol
Parameter
Low Drive
Med Drive
Hi Drive
Units
Notes
Min.
Max.
Min.
Max.
Min.
Max.
T1
Valid rising edge of EX_CLK to valid signal on the
output.
10
8.5
6.5
ns
T2
Valid signal hold time after the rising edge of EX_CLK
1
ns
T3
Valid data signal on an input prior to the rising edge of
EX_CLK
222
ns
T4
Required hold time of a data input after the rising edge
of EX_CLK
0.5
ns
T5
Valid control/arbiter signal on an input prior to the
rising edge of EX_CLK
3.5
ns
T6
Required hold time of a control/arbiter input after the
rising edge of EX_CLK
0.5
ns
NOTES:
1. Timing was designed for a system load between 5pF and 60pF for low drive setting at typically no more than a 33MHz clock
2. Timing was designed for a system load between 5pF and 50pF for medium drive setting at typically no more than a 66MHz
clock
3. Timing was designed for a system load between 5pF and 40pF for high drive setting at typically no more than a 80MHz clock
4. Drive settings do not apply to EX_CS_N signals and are expected to be point to point. The timing on this signal was designed
for a system load between 5pF and 10pF
5. EX_control_signals output signals consist of EX_ALE, EX_ADDR, EX_CS_N, EX_GNT_REQ_N, EX_GNT_N, EX_RD_N,
EX_WR_N, EX_WAIT_N
6. EX_control_signals input signals consist of EX_ADDR, EX_CS_N, EX_SLAVE_CS_N, EX_REQ_GNT_N, EX_REQ_N,
EX_BURST, EX_RD_N, EX_WR_N
EX_CLK
T
4
T
3
T
2
T
1
EX_DATA, _BE_N, PARITY -
output_signals
EX_ control signals -
output_signals
T
6
T
5
EX_DATA, _BE_N, PARITY -
input_signals
EX_ control signals -
input_signals
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