Philips Semiconductors

ISP1105/1106/1107

Advanced USB transceivers

Product data

Rev. 06 — 30 November 2001

6 of 24

9397 750 08872

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

[1]

Symbol names with an overscore (e.g. NAME) indicate active LOW signals.

[2]

Down bonded to the exposed diepad.

7.

Functional description

7.1 Function selection

[1]

Signal levels on (D

+, D−) are determined by other USB devices and external pull-up/down resistors.

[2]

In ‘suspend’ mode (SUSPND = HIGH) the differential receiver is inactive and output RCV is always

LOW. Out-of-suspend (‘K’) signalling is detected via the single-ended receivers VP and VM.

[3]

During suspend, the slew-rate control circuit of low-speed operation is disabled. The (D

+, D−) lines

are still driven to their intended states, without slew-rate control. This is permitted because driving

during suspend is used to signal remote wake-up by driving a ‘K’ signal (one transition from idle to

‘K’ state) for a period of 1 to 15 ms.

13

13

15

-

Internal regulator option: regulated supply voltage output

(3.0 to 3.6 V) during 5 V operation; a decoupling capacitor

of at least 0.1

µF is required

Regulator bypass option: used as a supply voltage input

for 3.3 V operation. (3.3 V

±10%)

14

14

16

-

Internal regulator option: supply voltage input

(4.0 to 5.5 V); can be connected directly to USB supply

15

15

1

-

pull-up supply voltage (3.3 V

±10%); connect an external

1.5 k

Ω resistor on D+ (full-speed) or D− (low-speed); pin

function is controlled by input SOFTCON:

ensures zero pull-up current

SOFTCON

16

16

2

I

software controlled USB connection input; a HIGH level

external 1.5 k

Ω pull-up resistor; this allows USB

connect/disconnect signalling to be controlled by software

Table 3:

Pin

Type

Description

ISP1105

HBCC16

ISP1106/7

HBCC16

ISP1106/7

TSSOP16

Table 4:

Function table

SUSPND

OE

(D

+, D−)

RCV

VP/VM

Function

L

L

driving &

receiving

active

active

normal driving

(differential receiver active)

L

H

receiving[1]

active

active

receiving

H

L

driving

inactive[2]

active

driving during ‘suspend’[3]

(differential receiver inactive)

H

H

high-Z[1]

inactive[2]

active

low-power state