TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 627
TX4939XBG-400
Manufacturer Part Number
TX4939XBG-400
Description
Manufacturer
Toshiba
Datasheet
1.TX4939XBG-400.pdf
(740 pages)
Specifications of TX4939XBG-400
Cpu Core
TX49/H4 90nm
Clock Mhz/max Mips
400/520
Inst./data Cache
32KB (4 Way)/32KB (4 Way)
Tlb
x
1cycle Mac
x
Volts (v)
1.25/2.5/3.3
Peripherals
DDR, NAND, ATA, ETHERNET, SECURITY, FPU, MMU, SPI, I2S, I2C, PCI, VIDEO, UART, TIMER, RTC
Companion Chip
TC86C001FG
Package
PGBA456
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I2S
23.2. I2S Function
23.2.1. I
I
a clock line. Since the transmitter and receiver have the same clock signal for data transmission, the transmitter as the
master, has to generate the bit clock (SCK), and word-select (WS). Figure 23-3 illustrates simple system configurations
and the basic interface timing.
Note that the time-slot (1/fs) could be 64, 48, or 32 bit-wide. Input data could be 16, 18, 20 or 24 bits and could be left- or
right-justify with MSB first or LSB first. There are three formats shown in Figure 23-3. Figure 1.3(a) illustrates Standard
Data Format (Sony Format) with Left-Channel “H” and Right-channel “L”, (b) Left Justified Format with Left-channel “L” and
Right-channel “H”. For I
Rev. 3.1 November 1, 2005
2
S bus is a 3-pin serial link consisting of a line for two time multiplexed data channels (left and right), a word select line and
2
S Interface
Transmitter
2
S data format, there is one clock delay to latch the data bit.
Word select
Clock
WS
SCK
Data
SD
Transmitter-Master
Right Channel
WORD n-1
SCK
WS
SD
MSB
Figure 23-3 I
Receiver
23-3
Left Channel
WORD n
2
S Interface
Transmitter
Receiver-Master
LSB
SCK
WS
SD
MSB
Right Channel
WORD n+1
Toshiba RISC Processor
Receiver
TX4939
23
23
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