isp1181 NXP Semiconductors, isp1181 Datasheet - Page 13

• Manufacturer Part Number: isp1181
• Description: Isp1181 Full-speed Universal Serial Bus Interface Device
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 08938
Product data
Table 5:
Each programmable FIFO can be configured independently via its ECR, but the total
physical size of all enabled endpoints (IN plus OUT) must not exceed 2462 bytes
(512 bytes for non-isochronous FIFOs).
Table 6
2462 bytes. The total number of logical bytes in the example is 1311. The physical
storage capacity used for double buffering is managed by the device hardware and is
transparent to the user.
Table 6:
FFOSZ[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Physical size
(bytes)
64
64
2046
16
16
128
128
shows an example of a configuration fitting in the maximum available space of
Programmable FIFO size
Memory configuration example
Logical size
(bytes)
64
64
1023
16
16
64
64
Rev. 04 — 30 October 2001
Non-isochronous
8 bytes
16 bytes
32 bytes
64 bytes
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
Endpoint description
control IN (64 byte fixed)
control OUT (64 byte fixed)
double-buffered 1023-byte isochronous endpoint
16-byte interrupt OUT
16-byte interrupt IN
double-buffered 64-byte bulk OUT
double-buffered 64-byte bulk IN
© Koninklijke Philips Electronics N.V. 2001. All rights reserved.
Isochronous
16 bytes
32 bytes
48 bytes
64 bytes
96 bytes
128 bytes
160 bytes
192 bytes
256 bytes
320 bytes
384 bytes
512 bytes
640 bytes
768 bytes
896 bytes
1023 bytes
Full-speed USB interface
ISP1181
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