參數(shù)資料
型號(hào): ISP1362EE,551
廠商: NXP SEMICONDUCTORS
元件分類: 總線控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PBGA64
封裝: 6 X 6 MM, 0.80 HEIGHT, PLASTIC, MO-195, SOT-543-1, TFBGA-64
文件頁數(shù): 5/152頁
文件大?。?/td> 677K
代理商: ISP1362EE,551
ISP1362_5
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 05 — 8 May 2007
102 of 152
NXP Semiconductors
ISP1362
Single-chip USB OTG Controller
14.9 Control and bulk transfer (aperiodic transfer) registers
14.9.1 HcATLBufferSize register (R/W: 34h/B4h)
This register allows you to allocate the size of the ATL buffer to be used for aperiodic
transactions. The default value of the buffer size is set to 512 bytes, and the maximum
allowable allocated size is 4096 bytes. The bit description of the register is given in
Code (Hex): 34 — read
Code (Hex): B4 — write
14.9.2 HcATLBufferPort register (R/W: 44h/C4h)
In addition to the HcDirectAddressData register, the ISP1362 provides this register to act
as another data port to access the ATL buffer. The starting address to access the buffer is
always xed at 0000h. Therefore, random access of the ATL buffer is not allowed. The bit
description of the HcATLBufferPort register is given in Table 96.
Code (Hex): 44 — read
Code (Hex): C4 — write
The HCD is rst required to initialize the HcTransferCounter register with the byte count to
be transferred and check the HcBufferStatus register. The HCD then sends the command
(44h to read from the ATL buffer, and C4h to write to the ATL buffer) to the Host Controller
through the I/O port of the microprocessor. After the command is sent, the HCD starts
reading data from the ATL buffer or writing data to the ATL buffer. While the HCD is
accessing the buffer, the buffer pointer of ATL also automatically increases. When the
pointer has reached the initialized byte count of the HcTransferCounter register, the Host
Controller sets the AllEOTInterrupt bit of the Hc
PInterrupt register to logic 1 and updates
the HcBufferStatus register.
14.9.3 HcATLBlkSize register (R/W: 54h/D4h)
The ISP1362 partitions the ATL buffer into several equal sized blocks so that the Host
Controller can skip the current PTD and proceed to process the next PTD easily. The
block size of the ATL buffer must be specied in this register and must be a multiple of
8 bytes. The bit allocation of the HcATLBlkSize register is given in Table 97.
Table 94.
HcINTLCurrentActivePTD register: bit description
Bit
Symbol
Description
15 to 5
-
reserved
4 to 0
ActivePTD[4:0]
This 5-bit number represents the PTD that is currently active.
Table 95.
HcATLBufferSize register: bit description
Bit
Symbol
Access
Value
Description
15 to 0
ATLBufferSize[15:0]
R/W
0200h
The size of the buffer to be used for aperiodic transactions and must
be specied in bytes.
Table 96.
HcATLBufferPort register: bit description
Bit
Symbol
Access
Value
Description
15 to 0
DataWord[15:0] R/W
0000h
The data of the ATL buffer to be accessed through this data port.
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