MSC7118 Freescale Semiconductor / Motorola, MSC7118 Datasheet - Page 28

• Manufacturer Part Number: MSC7118
• Description: Low-Cost 16-bit DSP with DDR Controller
• Manufacturer: Freescale Semiconductor / Motorola

Electrical Characteristics
Figure 7 provides the AC test load for the DDR DRAM bus.
2.5.5
28
V
V
Notes:
Notes:
TH
OUT
No.
300
301
302
303
304
305
306
307
308
309
310
311
1
2
1.
2.
TDMxRCK/TDMxTCK
TDMxRCK/TDMxTCK High Pulse Width
TDMxRCK/TDMxTCK Low Pulse Width
TDM all input Setup time
TDMxRD Hold time
TDMxTFS/TDMxRFS input Hold time
TDMxTCK High to TDMxTD output active
TDMxTCK High to TDMxTD output valid
TDMxTD hold time
TDMxTCK High to TDMxTD output high impedance
TDMxTFS/TDMxRFS output valid
TDMxTFS/TDMxRFS output hold time
1.
2.
TDM Timing
Data input threshold measurement point.
Data output measurement point.
Output values are based on 30 pF capacitive load.
Inputs are referenced to the sampling that the TDM is programmed to use. Outputs are referenced to the programming edge
they are programmed to use. Use of the rising edge or falling edge as a reference is programmable. Refer to the MSC711x
Reference Manual for details. TDMxTCK and TDMxRCK are shown using the rising edge.
TDMxRFS (output)
TDMxRCK
MSC7118 Low-Cost 16-bit DSP with DDR Controller Data Sheet, Rev. 7
TDMxRFS
Output
TDMxRD
Characteristic
Table 19. DDR DRAM Measurement Conditions
303
303
Symbol
Figure 7. DDR DRAM AC Test Load
Figure 8. TDM Receive Signals
Z
0
Table 20. TDM Timing
= 50 Ω
301
304
305
310
300
Expression
0.4 × TC
0.4 × TC
TC
R
302
L
= 50 Ω
Min
20.0
V
8.0
8.0
3.0
3.5
2.0
4.0
2.0
2.5
—
—
—
OUT
V
DDR DRAM
REF
0.5 × V
311
Freescale Semiconductor
± 0.31 V
Max
14.0
10.0
13.5
DDM
—
—
—
—
—
—
—
—
—
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
V
V