ISP1130DL Philips Semiconductors, ISP1130DL Datasheet - Page 30

• Manufacturer Part Number: ISP1130DL
• Description: Universal Serial Bus compound hub with integrated keyboard controller
• Manufacturer: Philips Semiconductors

Table 35: Set Endpoint Status command: bit description
[1]
Table 36: Device Status register: bit allocation
Table 37: Device Status register: bit description
Philips Semiconductors
9397 750 06895
Objective specification
Bit
7
6
5
4 to 1
0
Bit
7 to 5
4
3
Bit
Symbol
Reset
Access
A ConditionalStall does not work if the PacketOverwritten status bit is set.
Symbol
ConditionalStall
RateFeedbackMode
Disable
-
Stalled
Symbol
-
BusReset
SuspendChange
W
X
7
-
9.3.1 Read Device Status
9.3.2 Set Device Status
9.3 General commands
Returns the Device Status register contents, see
SuspendChange, ConnectChange or BusReset bit is logic 1, the corresponding bit in
the Interrupt register is set and a microcontroller interrupt is generated.
Code (Hex) — FE
Transaction — read 1 byte.
Changes the Device Status register. The contents of read-only bits are ignored.
Code (Hex) — FE
Transaction — write 1 byte.
W
X
6
-
Description
A logic 1 stalls both endpoints of a Control endpoint (Endpoint identifier = 0),
unless the Setup Packet bit is set. In that case the entire command is ignored.
A logic 1 switches an interrupt endpoint to ‘rate feedback mode’, a logic 0 enables
‘toggle’ mode.
A logic 1 disables the selected endpoint, a logic 0 enables it again. A bus reset
(re-)enables all endpoints.
reserved
A logic 1 stalls the selected endpoint. A logic 0 unstalls the endpoint and
(re-)initializes it, whether it was stalled or not.
Description
reserved
A logic 1 signals that the device received a bus reset. Upon a bus reset the device
will automatically enter its default state (unconfigured and responding to
address 0). This bit is cleared when it is read.
A logic 1 signals that the value of the Suspend bit has changed. The Suspend bit
changes when the device enters ‘suspend’ mode or when it receives a ‘resume’
signal on its upstream port. This bit is cleared when it is read.
W
X
5
-
Rev. 01 — 23 March 2000
Reset
Bus
X
R
4
USB compound hub with keyboard controller
Suspend
Change
R
3
X
Table 36
Suspend
R/W
X
2
and
© Philips Electronics N.V. 2000. All rights reserved.
Connect
Change
Table
X
R
1
ISP1130
37. When the
Connect
R/W
0
0
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