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參數(shù)資料
| 型號： | STLC1502 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | VOICE OVER IP PROCESSOR |
| 中文描述： | IP語音處理器 |
| 文件頁數(shù)： | 56/81頁 |
| 文件大?。?/td> | 526K |
| 代理商： | STLC1502 |
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STLC1502
56/81
here below, where the D950 sends a message to the ARM. The same apply in the reverse direction with ARM
and D950 side swapped.
The D950 reads the D950 MAILBOX register bit corresponding to the channel it wants use for the
message. If it is set to 1, the previous message has not been read by the ARM and the channel is not
available. If the content of that bit is 0, then the D950 can write the message for the ARM into the
appropriate section of the DPRAM
The D950 writes any value in the appropriate D950_STATUS_X location (0<= X<= 15), indicating
that the message has just been put in the DPRAM. This will cause the corresponding bit in the D950
MAILBOX register to be set to 1.
If the corresponding bit in the D950 Mailbox Mask register is set to 1, then an interrupt request for the
ARM will be generated. The interrupt line is the logical OR of all the unmasked bits in the D950 MAIL-
BOX register.
The ARM interrupt service routine will read the D950 MAILBOX register and compare this with the
D950 Mailbox MASK register to determine which channel caused the interrupt.
The ARM reads the appropriate section of the DPRAM. When it has finished reading the message, it
reads the corresponding D950 STATUS location.
This latest read clears the corresponding bit in the D950 MAILBOX register. If no other unmasked
bits are set in the D950 MAILBOX register, the ARM interrupt clears, otherwise remains set.
Multiple channels can be used concurrently. It is up to the receiver to manage this eventuality. So the
DPRAM can be used to buffer the messages as it is processed, while other channels are still availa-
ble for communication.
7.10.2 Dual Port memory map [0x0C180000]
The base address of the Dual Port memory is
0x0C180000.
The base address of control registers is
0x0C188000
The DPRAM is mapped in the ARM memory space as shown below:
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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 |
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| 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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