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參數(shù)資料
| 型號(hào)： | SPCA514A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | MOSFET; Transistor Polarity:N Channel; Drain Source Voltage, Vds:60V; Continuous Drain Current, Id:75A; On-Resistance, Rds(on):0.008ohm; Rds(on) Test Voltage, Vgs:10V; Package/Case:TO-263; Leaded Process Compatible:No RoHS Compliant: No |
| 中文描述： | 數(shù)字音頻USB控制器 |
| 文件頁(yè)數(shù)： | 7/14頁(yè) |
| 文件大?。?/td> | 111K |
| 代理商： | SPCA514A |
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SPCA514A
#
Upload 6
USB
Flash memory The page size of
flash memory
Bulk OUT pipe
Pseudo DMA (1)
Test mode
Upload 8
CPU (0X8300) CPU (0X8300) 64 bytes
3.5.2. Upload Mode (1):
When SPCA514A wants to record sound into flash memory, the “OprMode” field in the
register (0X8301) must be set to the value of 0X1. In this mode, the CPU will read and
process the audio data and then write into flash memory by the FIFO mode. The deep of
post buffer is the same as the page size of flash memory in this mode.
When SPCA514A wants to read data from flash memory and to transfer through the
CPU, for example RS-232 port, the “OprMode” field in the register (0X8301) must be set to
the value of 0X2. In this mode, the CPU will read and process data from flash memory by
the FIFO mode. The deep of post buffer is the same as the page size of flash memory in
this mode.
3.5.4. Upload Mode (3):
When SPCA514A wants to upload data from flash memory to the PC through the USB
bus, the “OprMode” field in the register (0X8301) must be set to the value of 0X3. In this
mode, The data in flash memory will be read by the CPU and written into post buffer by the
pseudo DMA mode (2). The data in the post buffer will be read through the Bulk-IN pipe
by the USB host controller. The deep of post buffer is the same as the page size of flash
memory in this mode.
3.5.5. Upload Mode (4):
When the USB host wants to do loop-back test, the “OprMode” field in the register
(0X8301) must be set to the value of 0X4. The forward path is from the PC through Bulk-
OUT pipe to the CPU and the backward path is from the CPU through Bulk-IN pipe to the
PC. The backward path is supported in this mode and the forward path is supported in
the next mode, Upload Mode (5). The deep of post buffer is 64 bytes in this mode.
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