UCS1002-2 datasheet(93/114 Pages) MICROCHIP

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Programmable USB Port Power Controller with Charger Emulation

Datasheet

SMSC UCS1002

Revision 1.4 (07-16-13)

DATASHEET

Note 10.2 The lower threshold for the window comparator option is fixed at 400 mV and only applies

to the DPOUT pin. This setting cannot be used for the DMOUT port.

10.12.4

BC1.2 Emulation Stimulus X - Config 2 - 32h, 36h, 3Ah

The contents of this register are retained in Sleep.

Bits 7 - 4 - SX_RMAG[3:0] - Determines the magnitude of the response to the stimulus. The bit decode

changes meaning based on which response was selected as shown in Table 10.30. Table 10.31

through Table 10.33 show the specific decode for each function.

APPLICATION NOTE: Data written to any field that is identified as “do not use” will not be accepted. The data will

not be updated and the settings will remain set at the previous value.

Bits 3 - 0 - SX_RX[3:0] - Defines the stimulus response as shown in Table 10.29.

Table 10.28 Stimulus Options

STIMX[2:0] SETTING

STIMULUS

210

VBUS voltage ready to be applied (before port power switch is closed)

(default). Next stimulus will not wait for this stimulus to be removed.

DPOUT Voltage is > threshold (SX_TH).

Window comparator. DPOUT Voltage is < threshold (SX_TH) and DPOUT

Voltage is > fixed threshold (see Note 10.2).

DMOUT Voltage is > threshold (SX_TH).

Do not use.

DPOUT Voltage is > threshold (SX_TH).

VBUS voltage is present (after port power switch is closed). Next stimulus

will not wait for this stimulus to be removed.

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