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ISP1130

Universal Serial Bus compound hub with integrated keyboard controller

Philips Electronics 

Philips Semiconductors

ISP1130

USB compound hub with keyboard controller

Table 12: Hub descriptor…continued

Offset Field name

(bytes)

Size

(bytes)

3

wHubCharacteristics 2

Value

(Hex)

0D, 00

15, 00

5

bPwrOn2PwrGood [1] 1

32

6

bHubContrCurrent 1

64

7

DeviceRemovable 1

08 [3]

8

PortPwrCtrlMask

1

FF

Comments

individual power switching,

individual overcurrent protection

individual power switching,

no overcurrent protection

100 ms

maximum hub controller current

(100 mA)

downstream ports removable;

embedded functions non-removable

must be all ones for compatibility with

USB Specification Rev. 1.0

[1] Value in units of 2 ms.

[2] Depending on the number of embedded functions configured, the value ranges from 03H to 05H or

from 02H to 04H (downstream port 2 disabled).

Remark: Downstream port 2 can be disabled by connecting both D+ and D− to VCC. Embedded

functions are configured via the USBCONA register (see Table 55).

[3] Default value (08H): ports 1 and 2 removable, port 3 non-removable. The value can be 08H, 18H or

38H depending on the configured number of embedded functions (1, 2 or 3). When downstream

port 2 is disabled, the possible values are 4CH, 0CH or 1CH (1, 2 or 3 embedded functions).

Table 13: String descriptors

String descriptors are optional and therefore disabled by default; they can be enabled via the

Set Mode command (see Table 25).

Offset Field name

(bytes)

Size Value Comments

(bytes) (Hex)

String descriptor (0): language ID string

0

bLength

1

04

descriptor length = 4 bytes

1

bDescriptorType

1

03

type = STRING

2

bString

2

09, 04 LANGID code zero

String descriptor (1): manufacturer string

0

bLength

1

2E

descriptor length = 46 bytes

1

bDescriptorType

1

03

type = STRING

2

bString

44

UC [1] “Philips Semiconductors”

String descriptor (2): product string

0

bLength

1

10

descriptor length = 16 bytes

1

bDescriptorType

1

03

type = STRING

2

bString

14

UC [1] “ISP113X” [2]; X = 0H for the ISP1130

[1] Unicode encoded string.

[2] X represents the hardware setting DEVNAME (4 bits), which specifies the final digit (X) in the device

name string “ISP113X”. The Unicode representation of this digit is “0000.0000.0011.DEVNAME”.

9397 750 06895

Objective specification

Rev. 01 — 23 March 2000

© Philips Electronics N.V. 2000. All rights reserved.

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