MPC8308VMADDA Freescale Semiconductor, MPC8308VMADDA Datasheet - Page 20

• Manufacturer Part Number: MPC8308VMADDA
• Description: Microprocessors - MPU E300 MP PbFr 266
• Manufacturer: Freescale Semiconductor

Specifications of MPC8308VMADDA

• Rohs: yes
• Processor Series: MPC8308
• Core: e300
• Maximum Clock Frequency: 266 MHz
• Interface Type: I2C, JTAG, UART
• Operating Supply Voltage: 0.95 V to 1.05 V
• Maximum Operating Temperature: 0 C to + 105 C
• Mounting Style: SMD/SMT
• Package / Case: MAPBGA-473

Ethernet: Three-Speed Ethernet, MII Management
This figure shows the RGMII AC timing and multiplexing diagrams.
8.3
The electrical characteristics specified here apply to MII management interface signals MDIO
(management data input/output) and MDC (management data clock). The electrical characteristics for MII
20
At recommended operating conditions with LV
GTX_CLK125 reference clock period
GTX_CLK125 reference clock duty cycle
Notes:
1. In general, the clock reference symbol representation for this section is based on the symbols RGT to represent RGMII timing.
2. This implies that PC board design requires clocks to be routed such that an additional trace delay of greater than 1.5 ns is
3. For 10 and 100 Mbps, t
4. Duty cycle may be stretched/shrunk during speed changes or while transitioning to a received packet's clock domains as long
5. Duty cycle reference is 0.5*LV
6. This symbol is used to represent the external GTX_CLK125 and does not follow the original symbol naming convention.
For example, the subscript of t
(F) times follows the clock symbol that is being represented. For symbols representing skews, the subscript is skew (SK)
followed by the clock that is being skewed (RGT).
added to the associated clock signal.
as the minimum duty cycle is not violated and stretching occurs for no more than three t
between.
(At Transmitter)
Ethernet Management Interface Electrical Characteristics
RXD[8:5][3:0]
RXD[7:4][3:0]
TXD[8:5][3:0]
TXD[7:4][3:0]
GTX_CLK
(At PHY)
(At PHY)
RX_CTL
RX_CLK
TX_CLK
TX_CTL
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 3
RGT
Figure 11. RGMII AC Timing and Multiplexing Diagrams
scales to 400 ns ± 40 ns and 40 ns ± 4 ns, respectively.
Table 25. RGMII AC Timing Specifications (continued)
DD
RGT
represents the RGMII receive (RX) clock. Note also that the notation for rise (R) and fall
DD
RXD[3:0]
TXD[3:0]
RXD[4]
TXD[4]
of 2.5 V ± 5%.
TXEN
RXDV
RXD[8:5]
RXD[7:4]
TXD[8:5]
TXD[7:4]
RXERR
TXERR
RXD[9]
TXD[9]
t
G125H
t
G12
/t
G125
6
t
t
SKRGT
SKRGT
t
RGTH
47
—
RGT
t
8.0
of the lowest speed transitioned
—
RGT
Freescale Semiconductor
t
t
SKRGT
SKRGT
53
—
ns
%