參數(shù)資料
型號: ISP1761ET,518
廠商: ST-ERICSSON
元件分類: 總線控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PBGA128
封裝: 9 X 9 MM, 0.80 MM HEIGHT, PLASTIC, MO-195, SOT857-1, TFBGA-128
文件頁數(shù): 20/164頁
文件大?。?/td> 767K
代理商: ISP1761ET,518
ISP1761_5
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 13 March 2008
115 of 163
NXP Semiconductors
ISP1761
Hi-Speed USB OTG controller
[1]
The reserved bits should always be written with the reset value.
10.7 DMA registers
The Generic DMA (GDMA) transfer can be done by writing the proper opcode in the DMA
Command register. The control bits are given in Table 123.
GDMA read or write (opcode = 00h/01h) for Generic DMA slave mode
The GDMA (slave) can operate in counter mode. RD_N and WR_N are DMA data strobe
signals. These signals are also used as data strobe signals during the PIO access. An
internal multiplex will redirect these signals to the DMA Controller for the DMA transfer or
to registers for the PIO access.
Table 121. Endpoint Type register (address 0208h) bit allocation
Bit
15
14
13
12
11
10
9
8
Symbol
reserved[1]
Reset
00000000
Bus reset
00000000
Access
R/W
Bit
7
6
5
4
3
2
1
0
Symbol
reserved[1]
NOEMPKT
ENABLE
DBLBUF
ENDPTYP[1:0]
Reset
00000000
Bus reset
00000000
Access
R/W
Table 122. Endpoint Type register (address 0208h) bit description
Bit
Symbol
Description
15 to 5
-
reserved
4
NOEMPKT
No Empty Packet: Logic 0 causes the ISP1761 to return a null length
packet for the IN token after the DMA IN transfer is complete. Set to
logic 1 to disable the generation of the null length packet.
3
ENABLE
Endpoint Enable: Logic 1 enables the FIFO of the indexed endpoint.
The memory size is allocated as specied in the Endpoint
MaxPacketSize register. Logic 0 disables the FIFO.
Remark: Stalling a data endpoint will confuse the Data Toggle bit on the
stalled endpoint because the internal logic picks up from where it has
stalled. Therefore, the Data Toggle bit must be reset by disabling and
re-enabling the corresponding endpoint (by setting bit ENABLE to
logic 0, followed by logic 1 in the Endpoint Type register) to reset the
PID.
2
DBLBUF
Double Buffering: Logic 1 enables double buffering for the indexed
endpoint. Logic 0 disables double buffering.
1 to 0
ENDPTYP[1:0] Endpoint Type: These bits select the endpoint type as follows.
00 — Not used
01 — Isochronous
10 — Bulk
11 — Interrupt
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