MPC8275VR datasheet(71/76 Pages) MOTOROLA

71 / 76 page

MOTOROLA

MPC8280 PowerQUICC II™ Family Hardware Speciﬁcations

Package Description

The following sections provide the package parameters and mechanical dimensions.

9.1

Package Parameters

Package parameters are provided in Table 23.

1 Should be tied to VDDH via a 2K Ω external pull-up resistor.

2 The default conﬁguration of the CPM pins (PA[0–31], PB[4–31], PC[0–31], PD[4–31]) is input. To prevent excessive

DC current, it is recommended to either pull unused pins to GND or VDDH, or to conﬁgure them as outputs.

3 Must be pulled down or left ﬂoating.

4 If PCI is not desired, must be pulled up or left ﬂoating.

5 Sphere is not connected to die.

6 GNDSYN (B18): This pin exists as a separate ground signal in MPC826x(A) devices; it does not exist as a separate

ground signal on the MPC8275/MPC8270. New designs must connect B18 to GND and follow the suggestions in

Section 4.3, “Layout Practices.” Old designs in which the MPC8275/MPC8270 is used as a drop-in replacement can

leave the pin connected to GND with the noise ﬁltering capacitors.

7 XFC (A18) pin: This pin is used in MPC826x(A) devices; it is not used in MPC8275/MPC8270 because there is no

need for external capacitor to operate the PLL. New designs should connect A18 (XFC) pin to GND. Old designs in

which the MPC8275/MPC8270 is used as a drop-in replacement can leave the pin connected to the current capacitor.

Table 23. Package Parameters

Package

Devices

Outline

(mm)

Type

Interconnects

Pitch

(mm)

Nominal Unmounted

Height (mm)

MPC8280

MPC8270

37.5 x 37.5

TBGA

480

1.27

1.55

MPC8275VR

MPC8270VR

27 x 27

PBGA

516

2.25

MPC8275ZQ

MPC8270ZQ

27 x 27

PBGA

516

2.25

MPC8275VR 数据表(PDF) 71 Page - Motorola, Inc

MPC8275VR 数据表(HTML) 71 Page - Motorola, 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

数据表下载