MSC8157ETVT1000A Freescale Semiconductor, MSC8157ETVT1000A Datasheet - Page 88

• Manufacturer Part Number: MSC8157ETVT1000A
• Description: Digital Signal Processors & Controllers - DSP, DSC Qual 8157 EN FG 1GHz -45 to 105c
• Manufacturer: Freescale Semiconductor

Specifications of MSC8157ETVT1000A

• Rohs: yes
• Core: SC3850
• Data Bus Width: 32 bit
• Program Memory Size: 32 KB
• Data Ram Size: 512 KB
• Number Of Programmable I/os: 32
• Number Of Timers: 2
• Operating Supply Voltage: 0.97 V to 1.05 V
• Maximum Operating Temperature: + 105 C
• Package / Case: FCPBGA-783
• Mounting Style: SMD/SMT

Electrical Characteristics
3.6.4.2
Table 51
Figure 23
88
Data to clock output skew (at transmitter)
Data to clock input skew (at receiver)
Notes:
presents the RGMII AC timing specifications for applications requiring an on-board delayed clock.
1.
2.
3.
shows the RGMII AC timing and multiplexing diagrams.
(At Transmitter)
At recommended operating conditions with V
Program GCR4 as 0x00000000, UCC1_DELAY_HR as 0x00000000, and UCC3_DELAY_HR as 0x00000000.
This implies that PC board design requires clocks to be routed such that an additional trace delay of greater than 1.5 ns and
less than 2.0 ns is added to the associated clock signal.
(At Receiver)
RGMII AC Timing Specifications
GE_MDIO
GE_MDIO
GE_MDC
GTX_CLK
Table 51. RGMII at 1 Gbps with On-Board Delay
(Output)
RXD[3:0]
TXD[3:0]
RX_CLK
RX_CTL
TX_CTL
(Input)
Parameter/Condition
MSC8157 Six-Core Digital Signal Processor Data Sheet, Rev. 1
Figure 23. RGMII AC Timing and Multiplexing
Figure 22. MII Management Interface Timing
3
t
MDC_H
3
txd[3:0]
rxd[3:0]
t
MDDVKH
t
MDC
t
MDC_L
DDIO
txd[7:4]
rxd[8:5]
of 2.5 V ± 5%.
t
MDKHDX
t
MDDXKH
t
SKEWT
2
AC Timing Specifications
Symbol
t
t
SKEWR
SKEWT
–0.5
Min
1
Freescale Semiconductor
Typ
—
—
t
SKEWR
1
Max
0.5
2.6
Unit
ns
ns