10

Data Sheet S13918EJ3V0DS

1.2 Tables by Pin Function

Table 1-1. Oscillator Circuit Switching Control (CLKSEL)

CLKSEL

Type of oscillator circuit

L

Input clocks from 48 MHz oscillator

H

Clock input using 4 MHz crystal resonator (drive circuit is incorporated)

Remark

Table 1-2. Power Mode/Downstream Port Number Control (PSSEL, PVSEL)

PSSEL

PVSEL

Power mode

Port #1

Port #2

Port #3

Port #4

Port #5

L

L

Self-power

Note 1

×

L

H

Self-power

Note 1

H

L

Bus power

Note 2

×

H

H

Prohibited

Note 3

––

–

–

–

Notes 1.

Do not cut-off clock input when using self-power. If it is cut-off, internal functions stop and operation

may not be possible even if clocks are input again.

2.

When using bus power, up to four ports can be used.

3.

The combination PSSEL=“H”, PVSEL=“H” is prohibited. Operation in this case is not guaranteed.

Remark

Also set according to this table when setting the number of ports in a Mask ROM code product to up to

5 ports. Directly connect data lines of unused ports to GND.

Table 1-3. Handling of Pins CS1 to CS5 According to Setting of wHubCharacteristics Field of HUB Class

Descriptor

wHubCharacteristics

Bits 4, 3

CS1

CS2

CS3

CS4

CS5

0b00

Common in all ports

0b01

Port #1

Port #2

Port #3

Port #4

Port #5

0b10 or 0b11

Not available

Not available

Not available

Not available

Not available

Remark

Connect pins CS1 to CS5 to the Over Current Detect output pin of the power switch IC.

Clamp an unused or unavailable CS1 to CS5 pin to 3.3 V.

Table 1-4. Handling of Pins PP1 to PP5 According to Setting of wHubCharacteristics Field of HUB Class

Descriptor

wHubCharacteristics

Bits 1, 0

PP1

PP2

PP3

PP4

PP5

0b00

Common in all ports

0b01

Port #1

Port #2

Port #3

Port #4

Port #5

Remark

Connect pins PP1 to PP5 to the Port Power Control input pin of the power switch IC.

Leave an unused or unavailable PP1 to PP5 pin open.