Philips Semiconductors

ISP1105/1106/1107

Advanced USB transceivers

Product data

Rev. 06 — 30 November 2001

7 of 24

9397 750 08872

© Koninklijke Philips Electronics N.V. 2001. All rights reserved.

7.2 Operating functions

[1]

[2]

RCV* denotes the signal level on output RCV just before SE0 state occurs. This level is stable during

the SE0 period.

7.3 Power supply configurations

The ISP1105/1106/1107 can be used with different power supply configurations,

which can be changed dynamically. An overview is given in Table 9.

voltage regulator then produces 3.3 V for the USB connections. For 3.3 V operation,

independently connected to a voltage source (1.65 V to 3.6 V), depending on the

supply voltage of the external circuit.

connected. In this mode, the internal circuits of the ISP1105/1106/1107 ensure that

the (D

+, D−) pins are in three-state and the power consumption drops to the

low-power (suspended) state level. Some hysteresis is built into the detection of

this mode, the (D

+,D−) pins are made three-state and the ISP1105/1106/1107 allows

external signals of up to 3.6 V to share the (D

+, D−) lines. The internal circuits of the

ISP1105/1106/1107 ensure that virtually no current (maximum 10

µA) is drawn via

the (D

+, D−) lines. The power consumption through pin V

Table 5:

Driving function using single-ended input data interface (OE = L) [for

ISP1107 and ISP1105 (MODE = L)]

FSE0

VO

Data

L

L

differential logic 0

L

H

differential logic 1

H

L

SE0

H

H

SE0

Table 6:

Driving function using differential input data interface (OE = L) [for ISP1106

and ISP1105 (MODE = H)]

VMO

VPO

Data

L

L

SE0

L

H

differential logic 1

H

L

differential logic 0

H

H

illegal state

Table 7:

Receiving function (OE=H)

(D

+, D−)

RCV

VP[1]

VM[1]

differential logic 0

L

L

H

differential logic 1

H

H

L

SE0

RCV*[2]

LL