參數資料
型號: 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: 18/152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
114 of 152
NXP Semiconductors
ISP1362
Single-chip USB OTG Controller
15.1.7 DcDMACounter register (R/W: F3h/F2h)
This command accesses the DcDMACounter register, which consists of two bytes. The bit
allocation is given in Table 121. Writing to the register sets the number of bytes for a DMA
transfer. Reading the register returns the number of remaining bytes in the current
transfer. A bus reset will not change programmed bit values.
The internal DMA counter is automatically reloaded from the DcDMACounter register. For
details, see Section 15.1.6.
Code (Hex): F2/F3 — write or read DcDMACounter register
Transaction — write or read 2 bytes (code or data)
15.1.8 Reset device (F6h)
This command resets the Peripheral Controller in the same way as an external hardware
reset by using input RESET. All registers are initialized to their ‘reset’ values.
Code (Hex): F6 — reset the device
Transaction — none (code only)
3
DMAEN
Writing logic 1 enables DMA transfer, logic 0 forces the end of an ongoing
DMA transfer. Reading this bit indicates whether DMA is enabled or not
(0 = DMA stopped; 1 = DMA enabled). This bit is cleared by a bus reset.
2
-
reserved
1 to 0
BURSTL[1:0] Selects the DMA burst length:
00 — single-cycle mode (1 byte)
01 — burst mode (4 bytes)
10 — burst mode (8 bytes)
11 — burst mode (16 bytes)
Bus reset value: unchanged.
Table 120. DcDMAConguration register: bit description …continued
Bit
Symbol
Description
Table 121. DcDMACounter register: bit allocation
Bit
15
14
13
12
11
10
9
8
Symbol
DMACR[15:8]
Reset
00000000
Access
R/W
Bit
7
6
5
4
3
2
1
0
Symbol
DMACR[7:0]
Reset
00000000
Access
R/W
Table 122. DcDMACounter register: bit description
Bit
Symbol
Description
15 to 0
DMACR[15:0]
This eld indicates the number of bytes for a DMA transfer.
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