TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 647

no-image

TX4939XBG-400

Manufacturer Part Number
TX4939XBG-400
Description
Manufacturer
Toshiba
Datasheet

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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TX4939XBG-400
Manufacturer:
NSC
Quantity:
872
Part Number:
TX4939XBG-400
Manufacturer:
TOSHIBA
Quantity:
10 440
Part Number:
TX4939XBG-400
Manufacturer:
XILINX
0
Part Number:
TX4939XBG-400
Manufacturer:
TOSHIBA/东芝
Quantity:
20 000
ACLINK
24.3.2. Usage Flow
This section outlines a process flow when using the AC’97 connected to ACLC.
the details of each operation performed in this process flow.
recording processes.
Rev. 3.1 November 1, 2005
clear pending DMA request if any
Register setting such as Volume
Write to DMA buffer and update
Dummy write to data register to
Stop updating DMA descriptor
DMA descriptor (repeatedly)
Disable transmit-data DMA
enable transmit-data DMA
Check completion status
Start DMA Channel and
System Software
Check AC’97 status
Setup DMA buffer
Start up AC-link
Configure DMAC
Disable ENLINK
Enable ENLINK
(*)
(*) Register settings such as volume can be made during data playback.
The modem transmission and reception can be done in a similar way.
Figure 24-4 Audio Playback Process Flow
Completion interrupt (repeatedly)
DMAC channel goes inactive
DMA underrun error occurs
DMAC generates Transfer
Start sending data to slot
Stop sending data to slot
Start transmit-data DMA
Stop transmit-data DMA
CODECRDY Interrupt
Deassert ACRESET*
ACLC and DMAC
Assert ACRESET*
24-5
The diagrams below describe the audio playback and
Refer to the subsequent sections for
Toshiba RISC Processor
DAC Ready response
Start audio playback
Stop audio playback
Set CODEC Ready
Set volume, etc.
Start BITCLK
Stop BITCLK
Stop AC-link
AC’97
TX4939
24
24

Related parts for TX4939XBG-400