ISP1161A1BM ST-Ericsson Inc, ISP1161A1BM Datasheet - Page 31

• 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
The actual requirement for the buffer RAM need not reach the maximum size. You
can make your selection based on your application.
The following are some calculations of the ISO_A or ISO_B space for a frame of data:
When the embedded system wants to initiate a transfer to the USB bus, the data
needed for one frame is transferred to the ATL buffer or ITL buffer. The
microprocessor detects the buffer status through the interrupt routines. When the
HcBufferStatus register (2CH to read only) indicates that the buffer is empty, then the
microprocessor writes data into the buffer. When the HcBufferStatus register
indicates that the buffer is full, the data is ready on the buffer, and the microprocessor
needs to read data from the buffer.
During every 1 ms, there might be many events to generate interrupt requests to the
microprocessor for data transfer or status retrieval. However, each of the interrupt
types defined in this specification can be enabled or disabled by setting the
Hc PInterruptEnable register bits accordingly.
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Fig 26. HC internal FIFO buffer RAM partitions.
ATL buffer length = 400H, ITL buffer length = 200H.
This is insufficient use of the internal FIFO buffer RAM.
ATL buffer length = 1000H, ITL buffer length = 0H.
This will use the internal FIFO buffer RAM for only ATL transfers.
ISO packets of 64 bytes). The total RAM size needed is:
20
Maximum number of packets for different endpoints sent during one USB frame is
150 (150 ISO packets of 1 byte). The total RAM size needed is:
150
The Ping buffer RAM (ITL0) and the Pong buffer RAM (ITL1) have a maximum size
of 2 kbytes each. All data needed for one frame can be stored in the Ping or the
Pong buffer RAM.
Maximum number of useful data sent during one USB frame is 1280 bytes (20
8 + 1280 = 1440 bytes.
8 + 150
ATL buffer
ITL buffer
Rev. 03 — 23 December 2004
1 = 1350 bytes.
bottom
ITL0
ITL1
ATL
top
control/bulk/interrupt
FIFO buffer RAM
ISO_A
ISO_B
not used
USB single-chip host and device controller
data
MGT950
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
4 kbytes
programmable
ISP1161A1
sizes
30 of 136