MPC5606S datasheet(83/136 Pages) FREESCALE

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MPC5606S Microcontroller Data Sheet, Rev. 6

Freescale Semiconductor

3.9.2

Accumulator values

Equation 5 describes the accumulator value in unipolar configuration. The voltage Vin is applied between the integrator input

and VDDM. The internal generated reference voltage is not connected. The accumulator value is a function of VDDM, the number

of samples (Nsample) taken and the SSD constant (SSDconst). The SSD constant and offset (SSDconst, SSDoffset) vary with

temperature and process.

Eqn. 5

Equation 6 describes the accumulator value in bipolar configuration. The voltage Vin is applied between the integrator input and

the reference output. The accumulator value depends on the same parameters as in the unipolar case but the inaccuracy of the

voltage reference (Vvref) is compensated.

Eqn. 6

3.10

RESET electrical characteristics

The device implements a dedicated bidirectional RESET pin.

SSDOFFSET CC C SSD offset (unipolar, Nsample =

256)

–9

—

counts

SSD offset (bipolar, Nsample = 256)

–8

—

SSD offset (bipolar with offset

cancellation, Nsample = 256)

–5

—

fSSDSMP

CC D SSD cmpout sample rate

0.5

—

2.0

MHz

Table 38. SSD electrical characteristics (continued)

Symbol

Parameter

Value

Unit

Min

Typ

Max

ACCval

VDDM

 2



–

VDDM SSDconst



------------------------------------------------ Nsample

SSDoffset



ACCval

VDDM SSDconst



------------------------------------------------ Nsample

SSDoffset



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