PCD5096 datasheet(44/52 Pages) PHILIPS

44 / 52 page

1997 Jan 22

Philips Semiconductors

Preliminary speciﬁcation

Universal codec

PCD5096

Table 45 Digital I/Os

Notes

1. IOH = −8 mA for pins EARM_HF and EARP_HF. IOH = −2 mA for pins IO0 and IO1.

2. IOL = 8 mA for pins EARM_HF, EARP_HF and DO. IOL = 2 mA for pins IO0 and IO1.

3. Pull-down resistor present at pin TEST. Pull-up resistor present at pins IO0 and IO1.

4. For SDA pin, IOL = 3 mA at 5 V, 1 mA at 3.3 V and 0.7 mA at 2.7 V.

5. Output fall time of SDA measured from VIH(min) to VIL(max).

Table 46 Analog supplies

Notes

1. VBGP output current is zero. Decoupling capacitance between pins VBGP and VSSA_1 is 100 nF at 25 °C.

The bandgap has a temperature coefficient between

−0.2 and +0.2 mV/ °C.

2. Vref stands for VREF1 or VREF2. Vref output current is zero. Decoupling capacitance between VREF1 and VSSA_1,

or between VREF2 and VSSA_2 is between 1 µF and 100 µF, with a 100 nF capacitance in parallel. The voltage is

programmed by setting the appropriate value (80H to BFH) for each codec, in Control Register 3. VMIC_HS and

VMIC_HF output current is zero (e.g. by setting bits 6 and 7 in Control Register 3 to a logic 0. The output can only

source current (i.e. not sink).

3. Pins VMIC_HS and VMIC_HF (called VMIC below) are internally connected to VREF2 via two switches.

The VMIC_HS switch is closed by setting the HSMICON bit in Control Register 0 to a logic 1. The VMIC_HF switch

is closed by setting the HFMICON bit in Control Register 0 to a logic 1. The VMIC DC output current is 400

µA

maximum, and VREF2 must be programmed to its typical value. Use a low pass filter (resistor + capacitor) between

VMIC and VSSA_2 of 100 Ω +10 µF, with a 100 nF capacitance in parallel. VMIC adjustment can only be done by

adjusting VREF2.

4. Valid for both VMIC_HS and VMIC_HF pins.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

ILI

leakage current input pins

−−

µA

VIH

HIGH-level input voltage

0.7VDD_1

−−

VIL

LOW-level input voltage

−−

0.3VDD_1

VOH

HIGH-level output voltage

note 1

0.8VDD_1

−−

VOL

LOW-level output voltage

notes 2 and 4

−−

0.4

Rpd

equivalent pull-down resistor

note 3

−

Ω

Rpu

equivalent pull-up resistor

note 3

−

100

−

Ω

to(f)

SDA output fall time

notes 4 and 5

−−

250

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Vbgp

bandgap voltage

note 1

1.2

1.5

Vref

reference voltage

notes 2 and 3

1.975

2.000

2.025

Rvmic

microphone supply output resistance

note 4

−

150

Ω

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