Z8E520 datasheet(13/43 Pages) ZILOG

13 / 43 page

Z8E520/C520

Zilog

1.5 MBPS USB Device Controller

DS97KEY2005

P R E L I M I N A R Y

PIN FUNCTIONS

Port A. Port A (4–7) includes a Sink configuration. Port A

(3–0) has a Switch configuration.

In Sink, the options include input wakeup, bidirectional,

push-pull or open drain configurations (Figure 7). The Sink

is programmable from 0–15 mA (in 1 mA increments).

In Switch, the options also include input wakeup, bidirec-

tional, push-pull or open drain configurations (Figure 8).

The only difference between the two is the programmable

Sink option.

Figure 7. Port A (4–7) Sink Conﬁguration

Table 3. Port A (4–7) Programmable Current Sink Table

Symbol

Parameter

Min.

Max.

Units

Conditions

Number of Bits

Bits

4 bits, 16 settings, 0–15 mA

DNL

Diff Non-Linearity

0.50

LSB

Zero Code/Disable

µA

Disabled

ILSB

LSB Current

0.65

1.35

35%

Full Scale Current

9.75

20.25

35%, Note 1

Tsettle

Settling Time

1600

Within 10% of final value

Iovershoot Overshoot Current

1.05*Iset

µA

Vcomp

Compliance Voltage

1.1

Above Vss with IFMAX

Notes:

1. Setting all (4) ISNK cells to full scale is a violation of the Absolute Maximum Rating Spec.

0 –15 m A/ 1 m A increm ents

Pa d

100 K

Vcc

V cc

Wa ke

TBD

± 30%

I SINK (3 :0)

Pullup Resistor Enable

Typical

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