ISP1161ABD-S ST-Ericsson Inc, ISP1161ABD-S Datasheet - Page 38

• Manufacturer Part Number: ISP1161ABD-S
• Description: IC USB HOST CTRL FULL-SPD 64LQFP
• Manufacturer: ST-Ericsson Inc

Specifications of ISP1161ABD-S

• 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

Philips Semiconductors
9397 750 13962
Product data
Fig 30. HC time domain behavior: example 1.
Fig 31. HC time domain behavior: example 2.
SOF
interrupt
ISO
(frame N)
9.5.1 Time domain behavior
(frame N)
read ISO_A(N − 1) write ISO_A(N + 1)
In example 1
download a scenario before the next interrupt. Note that on the ISO interrupt of
frame N:
In example 2
when the ISO interrupt of the next frame (N + 1) is raised. As a result, there will be no
AT traffic in frame N + 1. The HC does not raise an AT interrupt in frame N + 1. The
AT part is simply postponed until frame N + 2. On the AT N + 2 interrupt, the transfer
mechanism is back to normal operation. This simple mechanism ensures, among
other things, that Control transfers are not dropped systematically from the USB in
case of an overloaded microprocessor.
In example 3
(SOF) of the next frame has occurred. This will result in undefined behavior for the
ISO data on the USB bus in frame N + 1 (depending on if the exact timing data is
corrupted or not). The HC should not raise an AT interrupt in frame N + 1.
•
•
on USB
The ISO packet for frame N + 1 will be written
The AT packet for frame N + 1 will be written.
traffic
(frame N + 1)
interrupt
(Figure
(Figure
(Figure
AT
(frame N + 1)
Rev. 03 — 23 December 2004
30), the microprocessor is fast enough to read back and
31), the microprocessor is still busy transferring the AT data
32), the ISO part is still being written while the Start of Frame
Full-speed USB single-chip host and device controller
read AT(N)
(frame N + 2)
(frame N + 2)
write AT(N + 1)
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
(frame N + 3)
(frame N + 3)
ISP1161A
MGT955
MGT954
37 of 134