ISP1183BS 查看數據表（PDF） - Philips Electronics

零件编号

产品描述 (功能)

生产厂家

ISP1183BS

Low-power Universal Serial Bus interface device with DMA

Philips Electronics 

Philips Semiconductors

ISP1183

Low-power USB interface device with DMA

SETUP and OUT token interrupts are generated after the ISP1183 has

acknowledged the associated data packet. In the bulk transfer mode, the ISP1183 will

issue interrupts for every ACK received for an OUT token or transmitted for an IN

token.

In the isochronous mode, an interrupt is issued on each packet transaction. The

firmware is responsible for timing synchronization with the host. This can be done

using the Pseudo Start-Of-Frame (PSOF) interrupt, enabled using bit IEPSOF in the

Interrupt Enable register. If a Start-Of-Frame is lost, PSOF interrupts are generated

every 1 ms. This allows the firmware to keep data transfer synchronized with the host.

After three missed SOF events, the ISP1183 will enter the suspend state.

An alternative way of handling the isochronous data transfer is to enable both the

SOF and PSOF interrupts and disable the interrupt for each isochronous endpoint.

9397 750 11804

Product data

Rev. 01 — 24 February 2004

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

13 of 62

Share Link: