MPC5645S datasheet(29/146 Pages) FREESCALE

29 / 146 page

Qorivva MPC5645S Microcontroller Data Sheet, Rev. 8

Freescale Semiconductor

2.4.3

System pins

The system pins are listed in Table 4.

VDDM

Stepper motor 3.3 V/5 V pad supply

SSD shares this supply.

94, 104

110, 120, 130

U25,W24,AA25

VSSM

Stepper motor ground

95, 105

111, 121, 131

U24,W24,AA24

VDDPLL

1.2 V PLL supply

AB4

VSUP_TEST

9 – 12 V flash test analog write signal

AC1

VDD_DR

1.8 V, 2.5 V, and 3.3 V DDR SDRAM supply

—

C2,C5,C8,C11,C14,

E3,H3,L3,N3,T3

VDD33_DR

Functional supply for SDRAM pads (where

available must be >= VDD_DR)

—

D6, D12, F4, R4

1 Decoupling capacitors must be connected between these pins and the nearest V

SS pin.

2 VDDA must be at the same voltage as VDDE_A.

3 This signal needs to be connected to ground during normal operation.

Table 4. System pin descriptions

System pin

Function

I/O

direction

Pad

type

RESET

configuration1

Pin number

176 LQFP

208 LQFP

416 TEPBGA

RESET

Bidirectional reset with

Schmitt-Trigger

characteristics and noise

filter.

I/O

Input, weak pull

EXTAL

Analog input to the oscillator

amplifier circuit. Input for the

clock generator in bypass

mode.

—

AB1

XTAL

Analog output of the

oscillator amplifier circuit.

Needs to be grounded if

oscillator bypass mode is

used.

—

AA1

EXTAL32

Analog input of the 32KHz

oscillator amplifier circuit.

—

AF24

XTAL32

Analog output of the 32 KHz

oscillator amplifier circuit.

Input for the clock generator

in bypass mode.

—

AF23

Table 3. Voltage supply pin descriptions (continued)

Supply pin

Function

Pin number

176 LQFP

208 LQFP

416 TEPBGA

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