参数资料
型号: RPIXP2850BB
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1400 MHz, RISC PROCESSOR, PBGA1356
封装: 37.50 X 37.50 MM, 1 MM PITCH, FCBGA-1356
文件页数: 22/130页
文件大小: 1782K
代理商: RPIXP2850BB
Intel IXP2800 and IXP2850 Network Processors
Electrical Specifications
118
Datasheet
Table 59. Slowport Write AC Parameters 1
1. These timing parameters are specified for a 1.4 GHz core frequency and from the rising edge of SP_CLK. Guaranteed by
functional test.
External Signals
tco l
max2/min (ns)
2. The default output timing is controlled by the TXE register. Refer to the Intel IXP2400 and IXP2800 Programmer’s Reference
Manual for further details. By default, this register is set to a value of 0x1. For each increment to this register, a PCLK period
delay is added to both the maximum and minimum specified values. For example, for a PCLK frequency of 700 MHz, a period
delay is ~ 1.4 ns; using a TXE register value of 0x5, the maximum and minimum delay values would be calculated as follows:
Max = 9.0 + (5- 1) * 1.4 = 14.6 ns.
Min = 1.5 + (5 - 1) * 1.4 = 7.1 ns.
Note: this delay should not exceed the cycle time of SP_CLK.
th3 (ns) min
3. The sampling of the SP_ACK_L signal is controlled by the RXE register. Refer to the Intel IXP2400 and IXP2800 Program-
mer’s Reference Manual for further details. By default, this register is set to a value of 0x1. For each increment to this register,
a PCLK period delay is added to the setup and is subtracted from the hold specified values. For example, for a PCLK frequen-
cy of 700 MHz, a period delay is ~ 1.4 ns; using an RXE register value of 0x5, the setup and hold delay values would be cal-
culated as follows:
Setup = 12.2 + (5-1) * 1.4 = 17.8 ns.
Hold = 1.0 - (5-1) * 1.4 = - 4.6 ns.
Note: this delay should not exceed the cycle time of SP_CLK.
tsu3 (ns)
min
tpw (ns)
Loading
(pF)
SP_ALE
9.0/1.5
50
SP_CS[0]
9.0/1.5
50
SP_CS[1]
9.0/1.5
50
SP_WR
9.0/1.5
50
SP_ACK
1
12.2
SP_AD[1:0]
9.0/1.5
50
SP_AD[7:0]
output to external device
9.0/1.5
Figure 21. Read Transaction for Self-Timing Device
B2866-02
SP_ALE_L
SP_WR_L
SP_RD_L
SP_A[1:0]
02
46
8
10
12
14
16
18
20
SP_CLK
9:2
17:
10
24:
18
SP_CS_L
[1:0]
SP_AD[7:0]
SP_ACK_L
tdoz
tco
9:2
D[7:0]
17:
10
24:
18
tsu
th
tdzo
tco
th
tco
th
tco
tsu
相关PDF资料
PDF描述
RPM-075PTT86 PHOTO TRANSISTOR DETECTOR
RS5C316B-E2 0 TIMER(S), REAL TIME CLOCK, PDSO8
RS5C317B-E1 0 TIMER(S), REAL TIME CLOCK, PDSO14
RS5C317B-E2 0 TIMER(S), REAL TIME CLOCK, PDSO14
RS5C321A-E1 0 TIMER(S), REAL TIME CLOCK, PDSO8
相关代理商/技术参数
参数描述
RPIXP2855AA 制造商:Intel 功能描述:
RPIXP2855AB SLA7V 制造商:Intel 功能描述:
RPIXP2855ACR 制造商:Intel 功能描述:
RPIXP2855AD S LA7S 制造商:Intel 功能描述:DEVICE CON IXP2855AD 1.50G PBG
RPIXP2855AD 888562 制造商:Intel 功能描述:CPU - Central Processing Units IXP2855 Network Proc 1.5GHz FCPGA2-1356