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參數(shù)資料
| 型號： | PT7D6555 |
| 英文描述： | -40V Single P-Channel HEXFET Power MOSFET in a TSOP-6 (Micro 6) package |
| 中文描述： | 擴展的PCM接口控制器？ |
| 文件頁數(shù)： | 32/56頁 |
| 文件大小： | 489K |
| 代理商： | PT7D6555 |
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Preliminary Data Sheet
PT7D6555
Extended PCM Interface Controller
32
PT0105(08/02)
Ver:0
Configurable Interface Bit Number Register (CBNR)
Value after reset: 11111111B
Address: 30H(1/8H)
Read/Write
7 0
CBN7
CBN6
CBN5
CBN4
CBN3
CBN2
CBN1
CBN0
CBN7..0
CFI Bit Number 7..0.
The number of bits that constitute a CFI frame must be programmed to CMD2, CBNR:CBN9..0 as indicated below.
CBN9..0 = number of bits - 1
For a 8-kHz frame structure, the number of bits per frame can be derived from the data rate by division with 8000.
Configurable Interface Time Slot Adjustment Register (CTAR)
Value after reset: 00000000B
7
0
0
TSN6
TSN5
TSN4
Address:32H(1/9H)
Read/Write
TSN3
TSN2
TSN1
TSN0
TSN6..0
Time Slot Number.
The CFI framing signal (PFS if CMD1: CSS = 0 or FSC if CMD1: CSS = 1) marks the CFI time slot called TSN
according to the following formula:
TSN6..0 = TSN + 2
E.g.: If the framing signal is to mark time slot 0 (bit 7), CTAR must be set to 02H (CBSR to 20H ).
Note:
If CMD1: CSS = 0, the CFI frame will be shifted - together with the FSC output signal - with respect to PFS. The position
of the CFI frame relative to the FSC output signal is not affected by these settings, but is instead determined by CMD2:
FC2..0. If CMD1 :CSS = 1, the CFI frame will be shifted with respect to the FSC-input signal.
Configurable Interface Bit Shift Register (CBSR)
Value after reset: 00000000B
7 0
0
CDS2
CDS1
CDS0
Address: 34H(1/AH)
Read/Write
CUS3
CUS2
CUS1
CUS0
CDS2..0
CFI Downstream bit Shift 2..0.
From the zero offset bit position (CBSR = 20H ) the CFI frame (downstream and upstream) can be shifted by up to 6 bits
to the left (within the time slot number TSN programmed in CTAR) and by up to 2 bits to the right (within the previous
time slot TSN
–
1) by programming the CBSR: CDS2..0 bits:
CBSR: CDS2..0
000
001
010
011
100
101
110
111
Time Slot No.
TSN-1
TSN-1
TSN
TSN
TSN
TSN
TSN
TSN
Bit No.
1
0
7
6
5
4
3
2
The bit shift programmed to CBSR: CDS2..0 affects both the upstream and downstream frame position in the same way.
CUS3..0
CFI Upstream bit Shift 3..0.
These bits shift the upstream CFI frame relative to the downstream frame by up to 15 bits. For CUS3..0 = 0000, the
upstream frame is aligned with the downstream frame (no bit shift).
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