ISP1161A1BM,557 NXP Semiconductors, ISP1161A1BM,557 Datasheet - Page 80
ISP1161A1BM,557
Manufacturer Part Number
ISP1161A1BM,557
Description
Manufacturer
NXP Semiconductors
Datasheet
1.ISP1161A1BM557.pdf
(137 pages)
Specifications of ISP1161A1BM,557
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
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Philips Semiconductors
Table 66:
[1]
[2]
9397 750 13961
Product data
Endpoint
identifier
0
0
1 to 14
The total amount of FIFO storage allocated to enabled endpoints must not exceed 2462 bytes.
The data flow direction is determined by bit EPDIR in the DcEndpointConfiguration register; see
host (ISP1161A1 transmits); OUT: output from the USB host (ISP1161A1 receives).
Endpoint access and programmability
FIFO size
(bytes)
64 (fixed)
64 (fixed)
programmable
11.3.1 Endpoints with programmable FIFO size
11.3.2 Endpoint access
11.3.3 Endpoint FIFO size
11.3 Endpoint descriptions
[1]
A DMA transfer is terminated when any of the following conditions are met:
When the DMA transfer is terminated, the buffer is also cleared (even if the data is not
completely read) and the DMA handler is disabled automatically. For the next DMA
transfer, the DMA controller as well as the DMA handler must be re-enabled.
Each USB device is logically composed of several independent endpoints. An
endpoint acts as a terminus of a communication flow between the host and the
device. At design time each endpoint is assigned a unique number (endpoint
identifier, see
during enumeration), the endpoint number and the transfer direction allows each
endpoint to be uniquely referenced.
The DC has 16 endpoints: endpoint 0 (control IN and OUT) plus 14 configurable
endpoints, which can be individually defined as interrupt/bulk/isochronous, IN or OUT.
Each enabled endpoint has an associated FIFO, which can be accessed either via
the Programmed I/O interface or via DMA.
Table 66
I/O mode access. Endpoints 1 to 14 also support DMA access. DC FIFO DMA
access is selected and enabled via bits EPIDX[3:0] and DMAEN of the
DcDMAConfiguration register. A detailed description of the DC DMA operation is
given in
The size of the FIFO determines the maximum packet size that the hardware can
support for a given endpoint. Only enabled endpoints are allocated space in the
shared FIFO storage, disabled endpoints have zero bytes.
programmable FIFO sizes.
The following bits in the Endpoint Configuration register (ECR) affect FIFO allocation:
•
•
•
•
The DMA count is complete
DMAEN = 0
The DMA controller asserts EOT.
Endpoint enable bit (FIFOEN)
Section
lists the endpoint access modes and programmability. All endpoints support
Double
buffering
no
no
supported
Table
Rev. 03 — 23 December 2004
12.
66). The combination of the device address (given by the host
I/O mode
access
yes
yes
supported
USB single-chip host and device controller
DMA mode
access
no
no
supported
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Section
Table 67
13.1.1. IN: input for the USB
ISP1161A1
Endpoint type
control OUT
control IN
programmable
lists the
[2]
[2]
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