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參數(shù)資料
| 型號： | PCM3794RHBT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | SPECIALTY TELECOM CIRCUIT, PQCC32 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件頁數(shù)： | 18/67頁 |
| 文件大?。?/td> | 1417K |
| 代理商： | PCM3794RHBT |
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THREE-WIRE INTERFACE (SPI, MODE (PIN 28) = LOW)
MSB
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
D7
D6
D5
D4
D3
D2
D1
D0
0
LSB
Register Index (or Address)
Register Data
R0001-01
MC
MS
MD
16Bits
(1)SingleWriteOperation
MSB
LSB
MSB
(2)ContinuousWriteOperation
MSB
8BitsxNFrames
MC
MS
MD
NFrames
LSB MSB
LSB
MSB
LSB
Register Index
8Bits
Register(N)Data
Register(N+1)Data
Register(N+2)Data
T0012-03
SLES193C – AUGUST 2006 – REVISED FEBRUARY 2007
All write operations for the serial control port use 16-bit data words. Figure 29 shows the control data word
format. The most significant bit must be 0. There are seven bits, labeled IDX[6:0], that set the register address
for the write operation. The least significant eight bits, D[7:0], contain the data to be written to the register
specified by IDX[6:0].
Figure 30 shows the functional timing diagram for writing to the serial control port. To write the data into the
mode register, the data is clocked into an internal shift register on the rising edge of the MC clock. The serial
data should change on the falling edge of MC clock and should be LOW during write mode. The rising edge of
MS should be aligned with the falling edge of the last MC clock pulse in the 16-bit frame. MC can run
continuously between transactions while MS is in the LOW state.
Figure 29. Control Data Word Format for MD
Figure 30. Register Write Operation
25
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