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: 11/130页
文件大小: 1782K
代理商: RPIXP2850BB
Intel IXP2800 and IXP2850 Network Processors
Electrical Specifications
108
Datasheet
4.4.7
RDRAM
Table 45 lists the supported loading configurations, Table 44 lists the RDRAM DC parameters, and
Table 46 lists the RDRAM AC parameters.
Table 44. RDRAM DC Parameters
Symbol
Parameter
Minimum
Maximum
Unit
VCCR, VCCRA
Supply voltage
1.28
1.42
V
VTERM
Termination voltage
1.7
1.9
V
VREF
Reference voltage
1.2
1.6
V
VCIS,CTM1, 2
1. VCIS applies to both Clock and Clock.
2. Guaranteed by design.
Clock input voltage
swing on CTM pin
0.25
0.70
V
VCIS, CFM1, 2
Clock voltage swing on
CFM pin
0.25
0.70
V
VX 2
Clock differential
crossing-point voltage
1.30
1.80
V
VCM 2
Clock input
common-mode voltage
1.40
1.70
V
Data input low voltage
VREF -0.5
VREF -0.175
V
VDIH 2
Data input high voltage
VREF +0.175
VREF +0.5
V
VDIS 2
Data input voltage swing
0.4
1.0
V
ADI 2
Data input asymmetry
about V REF
-15%
15%
VDIS
IOL,TEST
Output current test
condition @ VOL = 0.9 V
30
mA
CMD, SCK 3
3. 28-ohm external termination with 0.9 V (Thevenin equivalent).
VOL
–0.3
0.5*Vccrio – 0.25
V
CMD, SCK3
VOH
0.5*Vccrio + 0.25
0.5*Vccrio + 0.3
V
PCLKM,
SYNCLKN, SIO 4
4. No termination.
VOL
– 0.3
0.3*Vccrio
V
PCLKM,
SYNCLKN, SIO 4
VOH
0.7*Vccrio
Vccrio + 0.3
V
SIO
VIL
– 0.3
0.3*Vccrio
V
SIO
VIH
0.7*Vccrio
Vccrio + 0.3
V
Table 45. RDRAM Loading
Bus Interface
Maximum Number of Loads
Trace Length (inches)
Short Channel: 400 and 533 MHz
4 devices per channel.
201
Long Channel: 400 MHz
2 RIMMs per channel – a maximum of
32 devices in both RIMMs.
Long Channel: 533 MHz
1 RIMM and 1 C-RIMM per channel –
a maximum of 16 devices.
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