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| 型號(hào)： | AT75C1010 |
| 英文描述： | AT75C1010 Telephony Software Module [Updated 11/01. 29 Pages] This software module runs on the OakDSPCore subsystem of the AT75 series SIAP. expanding its capabilities and making the processor flexible and east to integrate into most operating systems. |
| 中文描述： | AT75C1010電話軟件模塊[更新11/01。 29頁(yè)]本軟件模塊上運(yùn)行的AT75系列OakDSPCore子系統(tǒng)統(tǒng)計(jì)所。擴(kuò)大其能力，使處理器的靈活和東部地區(qū)融入大多數(shù)操作系統(tǒng)。 |
| 文件頁(yè)數(shù)： | 75/171頁(yè) |
| 文件大?。?/td> | 1288K |
| 代理商： | AT75C1010 |
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166
AT75C DSP Subsystem
1368C–INTAP–08/02
Frame Synchronization in
Slave Mode
In slave mode, the FS signal is generated by the AT75C according to the CODCNT,
CODFRM and CODSCK registers.
The FS signal is derived from a clock source by a simple divider. If the FSC bit in COD-
CNT is low, the FS signal is derived from a division of the system clock. If FSC is low,
the FS signal is derived from a division of the SCLK, independent of the source of
SCLK.
The division ratio between the FS clock source and the FS signal is defined by FD[7:0]
in the CODFRM register. This 8-bit number is the value by which to divide the serial
clock SCLK to derive the FS signal. If the bit FRL in CODSCK is low, the FS signal is the
direct output of the divider and has a 50% duty cycle (sometimes called long FS). If FRL
is high, the active FS level will last only one SCLK cycle (also called short FS).
The position of the first data bit, with respect to the FS signal, can also be programmed
through the DD field in CODFRM. DD is the number by which to delay the first data bit
from FS.
The state machines that control the data exchange are the same in slave mode as in
master mode. They rely on the SCLK and FS signals, independent of how these are
generated.
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