Ethernet: Three-Speed Ethernet, MII Management
Table 21. DUART DC Electrical Characteristics (continued)
Parameter
Symbol
Min
Max
Unit
High-level output voltage, IOH = –100 μA
Low-level output voltage, IOL = 100 μA
VOH
VOL
OVDD – 0.2
—
—
V
V
0.2
7.2
DUART AC Electrical Specifications
Table 22 provides the AC timing parameters for the DUART interface of the MPC8347EA.
Table 22. DUART AC Timing Specifications
Parameter
Value
Unit
Notes
Minimum baud rate
Maximum baud rate
Oversample rate
Notes:
256
> 1,000,000
16
baud
baud
—
—
1
2
1. Actual attainable baud rate will be limited by the latency of interrupt processing.
2. The middle of a start bit is detected as the 8th sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit values are
sampled each 16th sample.
8 Ethernet: Three-Speed Ethernet, MII Management
This section provides the AC and DC electrical characteristics for three-speeds (10/100/1000 Mbps) and
MII management.
8.1
Three-Speed Ethernet Controller
(TSEC)—GMII/MII/TBI/RGMII/RTBI Electrical Characteristics
The electrical characteristics specified here apply to gigabit media independent interface (GMII), the
media independent interface (MII), ten-bit interface (TBI), reduced gigabit media independent
interface (RGMII), and reduced ten-bit interface (RTBI) signals except management data input/output
(MDIO) and management data clock (MDC). The MII, GMII, and TBI interfaces are defined for 3.3 V,
and the RGMII and RTBI interfaces are defined for 2.5 V. The RGMII and RTBI interfaces follow the
Hewlett-Packard Reduced Pin-Count Interface for Gigabit Ethernet Physical Layer Device Specification,
Version 1.2a (9/22/2000). The electrical characteristics for MDIO and MDC are specified in Section 8.3,
“Ethernet Management Interface Electrical Characteristics.”
MPC8347EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 12
Freescale Semiconductor
23
FREESCALE [ Freescale ]
