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參數(shù)資料
| 型號： | STLC1502 |
| 廠商： | 意法半導體 |
| 英文描述： | VOICE OVER IP PROCESSOR |
| 中文描述： | IP語音處理器 |
| 文件頁數(shù)： | 20/81頁 |
| 文件大小： | 526K |
| 代理商： | STLC1502 |
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STLC1502
20/81
MIAB: Memory Interface Address Bus
MIWE: Memory Interface Write Enable
MIAA: Memory Interface Access Active (nCAS)
MISA: Memory Interface Setup Active (nRAS)
After the power-up the CPU must configure each SDRAM device, i.e. perform precharge-refresh-mode register
set procedure.
6.3.1.3 Memory Configuration register
Memory configuration registers are used to setup parameters that are same for all banks:
PWS: Power save mode
If PWS bit is set to’1’, the next refresh cycle will set the memory devices in the self-refresh mode.
The memories will exit the self-refresh mode, when the PWS mode is set to’0’.
TYPE: Memory type:
The TYPE bit is used to select a type of the external memory.
1 - SDRAM
0 - EDO
B3EN: Bank 3 enable
B2EN: Bank 2 enable
B1EN: Bank 1 enable
B0EN: Bank 0 enable
The bank enable bits are used to enable each bank separately.
If an AHB transfer is accessing a disabled bank, the DRAM Controller will return the error response
to the AHB master.
REFR: Refresh period
The REFR value is used to determine the refresh period. The period can be set in the 1 us steps.
REFR Refresh Period
00000000 Refresh is disabled
00000001 Refresh period is 1us
00000010 Refresh period is 2us
.
11111111 Refresh period is 255us
6.4 DMA Controller
The DMA controller is intended to be used with the Ethernet switch block to transfer Ethernet frames
between the Ethernet switch buffers and memory.
The DMAC needs initialization before starting operation. During operation it does not need interven-
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1 0
Reserved
PWS
TYPE
B3EN
B2EN
B1EN
B0EN
REFR
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| STLC1502D | 制造商:STMicroelectronics 功能描述:VOIP STRADIVARIUS 1 - Trays |
| STLC1502P | 制造商:STMicroelectronics 功能描述:VOICE OVER IP PROCESSOR - Trays |
| STLC1510 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:NorthenLite G.lite DMT Transceiver |
| STLC1511 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:NorthenLite⑩ G.lite BiCMOS Analog Front-End Circuit |
| STLC1512 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:NorthenLite⑩ G.lite BiCMOS Analog Front-End Circuit |
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