PPC8567ECVTAQJGA datasheet(37/139 Pages) FREESCALE

37 / 139 page

MPC8568E/MPC8567E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1

Freescale Semiconductor

Ethernet Interface and MII Management

8.2.5

TBI Single-Clock Mode AC Specifications

When the eTSEC is configured for TBI modes, all clocks are supplied from external sources to the relevant

eTSEC interface. In single-clock TBI mode, when TBICON[CLKSEL] = 1 a 125-MHz TBI receive clock

is supplied on TSECn TSECn_RX_CLK pin (no receive clock is used on TSECn_TX_CLK in this mode,

whereas for the dual-clock mode this is the PMA1 receive clock). The 125-MHz transmit clock is applied

on the TSEC_GTX_CLK125 pin in all TBI modes.

A summary of the single-clock TBI mode AC specifications for receive appears in Table 33.

A timing diagram for TBI receive appears in Figure 17.

Figure 17. TBI Single-Clock Mode Receive AC Timing Diagram

8.2.6

RGMII and RTBI AC Timing Specifications

Table 34 presents the RGMII and RTBI AC timing specifications.

Table 33. TBI single-clock Mode Receive AC Timing Specification

Parameter/Condition

Symbol

Min

Typ

Max

Unit

RX_CLK clock period

tTRR

7.5

8.0

8.5

RX_CLK duty cycle

tTRRH

RX_CLK peak-to-peak jitter

tTRRJ

——

250

Rise time RX_CLK (20%–80%)

tTRRR

—1.0

2.0

Fall time RX_CLK (80%–20%)

tTRRF

—1.0

2.0

RCG[9:0] setup time to RX_CLK rising edge

tTRRDV

2.0

——ns

RCG[9:0] hold time to RX_CLK rising edge

tTRRDX

1.0

——ns

Table 34. RGMII and RTBI AC Timing Specifications

At recommended operating conditions with LVDD of 2.5 V ± 5%.

Parameter/Condition

Symbol 1

Min

Typ

Max

Unit

Data to clock output skew (at transmitter)

tSKRGT

–5006

5006

Data to clock input skew (at receiver) 2

tSKRGT

1.0

—

2.8

Clock period duration 3

tRGT

7.2

8.0

8.8

tTRR

tTRRH

tTRRF

tTRRR

RX_CLK

RCG[9:0]

valid data

tTRRDX

tTRRDV

PPC8567ECVTAQJGA Datasheet(PDF) 37 Page - Freescale Semiconductor, Inc

PPC8567ECVTAQJGA Datasheet(HTML) 37 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL