参数资料
型号: MPC8541PXAJD
厂商: Freescale Semiconductor
文件页数: 8/88页
文件大小: 0K
描述: IC MPU POWERQUICC III 783-FCPBGA
标准包装: 36
系列: MPC85xx
处理器类型: 32-位 MPC85xx PowerQUICC III
速度: 533MHz
电压: 1.2V
安装类型: 表面贴装
封装/外壳: 783-BBGA,FCBGA
供应商设备封装: 783-FCPBGA(29x29)
包装: 托盘
配用: CWH-PPC-8540N-VE-ND - KIT EVAL SYSTEM MPC8540
MPC8541E PowerQUICC III Integrated Communications Processor Hardware Specification, Rev. 4.2
16
Freescale Semiconductor
DDR SDRAM
6
DDR SDRAM
This section describes the DC and AC electrical specifications for the DDR SDRAM interface of the
MPC8541E.
6.1
DDR SDRAM DC Electrical Characteristics
Table 11 provides the recommended operating conditions for the DDR SDRAM component(s) of the
MPC8541E.
Table 12 provides the DDR capacitance.
Table 11. DDR SDRAM DC Electrical Characteristics
Parameter/Condition
Symbol
Min
Max
Unit
Notes
I/O supply voltage
GVDD
2.375
2.625
V
1
I/O reference voltage
MVREF
0.49
× GVDD
0.51
× GVDD
V2
I/O termination voltage
VTT
MVREF – 0.04
MVREF + 0.04
V
3
Input high voltage
VIH
MVREF + 0.18
GVDD + 0.3
V
Input low voltage
VIL
–0.3
MVREF – 0.18
V
Output leakage current
IOZ
–10
10
μA4
Output high current (VOUT = 1.95 V)
IOH
–15.2
mA
Output low current (VOUT = 0.35 V)
IOL
15.2
mA
MVREF input leakage current
IVREF
—5
μA—
Notes:
1. GVDD is expected to be within 50 mV of the DRAM GVDD at all times.
2. MVREF is expected to be equal to 0.5 × GVDD, and to track GVDD DC variations as measured at the receiver. Peak-to-peak
noise on MVREF may not exceed ±2% of the DC value.
3. VTT is not applied directly to the device. It is the supply to which far end signal termination is made and is expected to be
equal to MVREF. This rail should track variations in the DC level of MVREF.
4. Output leakage is measured with all outputs disabled, 0 V
V
OUT GVDD.
Table 12. DDR SDRAM Capacitance
Parameter/Condition
Symbol
Min
Max
Unit
Notes
Input/output capacitance: DQ, DQS, MSYNC_IN
CIO
68
pF
1
Delta input/output capacitance: DQ, DQS
CDIO
—0.5
pF
1
Note:
1. This parameter is sampled. GVDD = 2.5 V ± 0.125 V, f = 1 MHz, TA = 25°C, VOUT = GVDD/2, VOUT (peak to peak) = 0.2 V.
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