ISP1160BM,551 NXP Semiconductors, ISP1160BM,551 Datasheet - Page 9

• Manufacturer Part Number: ISP1160BM,551
• Manufacturer: NXP Semiconductors

Specifications of ISP1160BM,551

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

ISP1160-01_7
Product data sheet
8.2 DMA mode
The ISP1160/01 also provides the DMA mode for external microprocessors to access its
internal FIFO buffer RAM. Data can be transferred by the DMA operation between a
microprocessor’s system memory and the ISP1160/01’s internal FIFO buffer RAM.
Remark: The DMA operation must be controlled by the external microprocessor system’s
DMA controller (Master).
Figure 4
ISP1160/01. The ISP1160/01 provides a DMA channel controlled by DREQ for DACK_N
signals for the DMA transfer between a microprocessor’s system memory and the
ISP1160/01 HC’s internal FIFO buffer RAM.
The EOT signal is an external end-of-transfer signal used to terminate the DMA transfer.
Some microprocessors may not have this signal. In this case, the ISP1160/01 provides an
internal EOT signal to terminate the DMA transfer as well. Setting the
HcDMAConfiguration register (21H to read, A1H to write) enables the ISP1160/01’s HC
internal DMA counter for the DMA transfer. When the DMA counter reaches the value set
in the HcTransferCounter register (22H to read, A2H to write), an internal EOT signal will
be generated to terminate the DMA transfer.
Fig 3.
Fig 4.
shows the DMA interface between a microprocessor system and the
Programmed I/O interface between a microprocessor and the ISP1160/01.
DMA interface between a microprocessor and the ISP1160/01.
Rev. 07 — 29 September 2009
PROCESSOR
PROCESSOR
MICRO-
MICRO-
DACK1_N
D [ 15:0 ]
WR_N
RD_N
DREQ1
CS_N
D [ 15:0 ]
IRQ1
WR_N
RD_N
EOT
A1
μP bus I/F
μP bus I/F
D [ 15:0 ]
WR_N
CS_N
A0
INT
RD_N
RD_N
Embedded USB host controller
D [ 15:0 ]
WR_N
DACK_N
DREQ
EOT
ISP1160/01
ISP1160/01
004aaa061
004aaa062
ISP1160/01
© ST-ERICSSON 2009. All rights reserved.
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