ISP1161A1BM ST-Ericsson Inc, ISP1161A1BM Datasheet - Page 82

• Manufacturer Part Number: ISP1161A1BM
• Description: IC USB HOST/DEVICE CTRLR 64-LQFP
• Manufacturer: ST-Ericsson Inc

Specifications of ISP1161A1BM

• Controller Type: USB 2.0 Controller
• Interface: Parallel
• Voltage - Supply: 3.3V, 5V
• Current - Supply: 47mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-1163; ISP1161A1BM,557

Philips Semiconductors
9397 750 13961
Product data
11.3.4 Endpoint initialization
11.3.5 Endpoint I/O mode access
11.3.6 Special actions on control endpoints
In response to the standard USB request, Set Interface, the firmware must program
all 16 ECRs of the ISP1161A1’s DC in sequence (see
endpoints are enabled or not. The hardware will then automatically allocate FIFO
storage space.
If all endpoints have been configured successfully, the firmware must return an empty
packet to the control IN endpoint to acknowledge success to the host. If there are
errors in the endpoint configuration, the firmware must stall the control IN endpoint.
When reset by hardware or via the USB bus, the ISP1161A1’s DC disables all
endpoints and clears all ECRs, except for the control endpoint which is fixed and
always enabled.
Endpoint initialization can be done at any time; however, it is valid only after
enumeration.
When an endpoint event occurs (a packet is transmitted or received), the associated
endpoint interrupt bits (EPn) of the DcInterrupt register will be set by the SIE. The
firmware then responds to the interrupt and selects the endpoint for processing.
The endpoint interrupt bit will be cleared by reading the DcEndpointStatus register
(ESR). The ESR also contains information on the status of the endpoint buffer.
For an OUT (receive) endpoint, the packet length and packet data can be read from
the ISP1161A1’s DC using the Read Buffer command. When the whole packet has
been read, the firmware sends a Clear Buffer command to enable the reception of
new packets.
For an IN (transmit) endpoint, the packet length and data to be sent can be written to
the ISP1161A1’s DC using the Write Buffer command. When the whole packet has
been written to the buffer, the firmware sends a Validate Buffer command to enable
data transmission to the host.
Control endpoints require special firmware actions. The arrival of a Setup packet
flushes the IN buffer and disables the Validate Buffer and Clear Buffer commands for
the control IN and OUT endpoints. The microcontroller needs to re-enable these
commands by sending an Acknowledge Setup command.
This ensures that the last Setup packet stays in the buffer and that no packets can be
sent back to the host until the microcontroller has explicitly acknowledged that it has
seen the Setup packet.
Rev. 03 — 23 December 2004
USB single-chip host and device controller
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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