UM1551 datasheet(4/17 Pages) STMICROELECTRONICS

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Description

UM1551

4/17

DocID023275 Rev 1

Jumper selectors

SW2 to SW4: operating mode (CTLx)

1 - 2 = 1, 2 - 3 = 0 (see Table 1)

SW5: power and data switch enable (EN)

1 - 2 = 1, 2 - 3 = 0

1 = enabled, 0 = disabled, VOUT discharge when ATTACH_EN = 0 (see Table 2)

SW1: attach detector enable (ATTACH_EN)

1 - 2 = 1, 2 - 3 = 0

1 = enabled if EN = 0 (see Table 2), 0 = disabled

The control inputs (CTL1 - CTL3, EN, ATTACH_EN) are also available on control connector

J6. If this connector is used, the jumper caps from SW1 to SW5 must be removed.

Table 1. CTLx truth table(1)

1. The VOUT discharge pulse is also intentionally omitted for transitions 010 <-> 011, 110 <-> 011.

SW4

(CTL1)

SW3

(CTL2)

SW2

(CTL3)

Mode

Note

Power and data switch turned off

Continuous VOUT discharge

S0 SDP

No VOUT discharge pulse on

transition 110 <-> 010

S3 SDP with remote wakeup

S0 CDP

No VOUT discharge pulse on

transition 111 <-> 011 for low

speed devices

S3 CDP with remote wakeup for low

speed devices / DCP auto-detect for

full-speed and high-speed devices

Automatic switch to DCP

auto-detect mode also after

a device detach

DCP auto-detect

DCP BC1.2

DCP divider

Table 2. EN and ATTACH_EN truth table

SW5 (EN)

SW1 (ATTACH_EN)

Attach detector

Continuous VOUT

discharge

Disabled

Yes

Enabled

Disabled

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