ISP1161A1BMGA STEricsson, ISP1161A1BMGA Datasheet - Page 32

• Manufacturer Part Number: ISP1161A1BMGA
• Manufacturer: STEricsson

Specifications of ISP1161A1BMGA

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

ISP1161A1_5
Product data sheet
9.4.3 Operation and C program example
Figure 29
mode. The ISP1161A1 provides one register as the access port for each buffer RAM. For
the ITL buffer RAM, the access port is the ITLBufferPort register (40H to read, C0H to
write). For the ATL buffer RAM, the access port is the ATLBufferPort register (41H to read,
C1H to write). The buffer RAM is an array of bytes (8 bits) while the access port is a 16-bit
register. Therefore, each read/write operation on the port accesses two consecutive
memory locations, incrementing the pointer of the internal buffer RAM by two.
The lower byte of the access port register corresponds to the data byte at the even
location of the buffer RAM, and the upper byte corresponds to the next data byte at the
odd location of the buffer RAM. Regardless of the number of data bytes to be transferred,
the command code must be issued merely once, and it will be followed by a number of
accesses of the data port (see
When the pointer of the buffer RAM reaches the value of the HcTransferCounter register,
an internal EOT signal will be generated to set bit 2, AllEOTInterrupt, of the HcμPInterrupt
register and update the HcBufferStatus register, to indicate that the whole data transfer
has been completed.
For ITL buffer RAM, every Start Of Frame (SOF) signal (1 ms) will cause toggling between
ITL0 and ITL1, but this depends on the buffer status. If both ITL0BufferFull and
ITL1BufferFull of the HcBufferStatus register are already logic 1, meaning that both ITL0
and ITL1 buffer RAMs are full, the toggling will not happen. In this case, the
microprocessor will always have access to ITL1.
Fig 28. PTD data with DWORD alignment in buffer RAM.
shows the block diagram for internal FIFO buffer RAM operations in the PIO
Rev. 05 — 29 September 2009
top
Section
8.4).
payload data
payload data
RAM buffer
(14 bytes)
(8 bytes)
(8 bytes)
PTD
PTD
USB single-chip host and device controller
MGT953
00H
08H
15H
18H
20H
ISP1161A1
© ST-ERICSSON 2009. All rights reserved.
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