MPC8610EC datasheet(34/96 Pages) FREESCALE

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MPC8610 Integrated Host Processor Hardware Specifications, Rev. 0

Electrical Characteristics

Freescale Semiconductor

Figure 8 provides the AC test load for the local bus.

Figure 8. Local Bus AC Test Load

Figure 9 to Figure 11 show the local bus signals.

Input setup to local bus clock (except LGTA/LUPWAIT)

tLBIVKH1

4.5

—

3, 4

LGTA/LUPWAIT input setup to local bus clock

tLBIVKL2

4.3

—

3, 4

Input hold from local bus clock (except LGTA/LUPWAIT)

tLBIXKH1

—

0.8

3, 4

LGTA/LUPWAIT input hold from local bus clock

tLBIXKL2

—

0.7

3, 4

LALE output transition to LAD/LDP output transition

(LATCH hold time)

tLBOTOT

0.75

—

Local bus clock to output valid (except LAD/LDP and LALE)

tLBKLOV1

—1.1

Local bus clock to data valid for LAD/LDP

tLBKLOV2

—1.2

Local bus clock to address valid for LAD, and LALE

tLBKLOV3

—1.2

Local bus clock to LALE assertion

tLBKLOV4

—1.4

Output hold from local bus clock (except LAD/LDP and

LALE)

tLBKLOX1

-0.6

—

Output hold from local bus clock for LAD/LDP

tLBKLOX2

-0.6

—

Local bus clock to output high Impedance (except

LAD/LDP and LALE)

tLBKLOZ1

—2.5

Local bus clock to output high Impedance for LAD/LDP

tLBKLOZ2

—2.5

Note:

1. The symbols used for timing specifications follow the pattern of t(First two letters of functional block)(signal)(state)(reference)(state) for

inputs and t(First two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tLBIXKH1 symbolizes local bus

timing (LB) for the input (I) to go invalid (X) with respect to the time the tLBK clock reference (K) goes high (H), in this case for

clock one(1). Also, tLBKHOX symbolizes local bus timing (LB) for the tLBK clock reference (K) to go high (H), with respect to

the output (O) going invalid (X) or output hold time.

2. Maximum possible clock skew between a clock LCLK[m] and a relative clock LCLK[n]. Skew measured between

complementary signals at BVDD/2. Skew number is valid only when LCLK[m] and LCLK[n] have the same load.

3. All signals are measured from BVDD/2 of the edge of local bus clock to 0.4 × BVDD of the signal in question for 3.3-V signaling

levels.

4. Input timings are measured at the pin.

5. The value of tLBOTOT is the measurement of the minimum time between the negation of LALE and any change in LAD.

6. For purposes of active/float timing measurements, the Hi-Z or off state is defined to be when the total current delivered

through the component pin is less than or equal to the leakage current specification.

7. Guaranteed by design.

Table 26. Local Bus Timing Parameters (BVDD = 3.3 V, 2.5 V and 1.8 V) (continued)

Parameter

Symbol1

Min

Max

Unit

Notes

Output

Z0 = 50 Ω

BVDD/2

RL = 50 Ω

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