TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 490

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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

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ATA100
17.6. Basic Operation Setup
This setup is for PRD not enable. In PRD, a PRD table must be setup in place of Transfer Start Address.
Rev. 3.1 November 1, 2005
Note: R_OR_WCTR and START_STOPBM of the DMA Command Start Register settings are unnecessary when a
WRITE DMA, READ DMA, WRITE DMA EXT or READ DMA EXT command is issued to the device and bit [2]
(Auto DMA Enable) of the System Control Register is set.
Bus Master Setup
Transfer Registers Setup
Issue Command
Set up Command Transfer Mode and Data Transfer Mode
Issue Host interrupt or read Alternate Status Register and
Example:
Transfer Word Count Register Setup
Sector Count Register Setup
Execute Data Transfer
Determine the Read/Write Transfer Direction
Transfer Start Lower Address Register Setup
Transfer Start Upper Address Register Setup
Transfer Start Top Address Register Setup
Rewrite System Control register
Command/Status Register, ATA Shadow
Sector Count Register, ATA Shadow
Burst Count Lower Register Setup
confirm that data transfer is possible
Additional Control Register Setup
Burst Count Upper Register Setup
LBA High Register, ATA Shadow
Command Mode 4, UltraDMA Mode 4 → 0x04C0
LBA Low Register, ATA Shadow
LBA Mid Register, ATA Shadow
Device Register, ATA Shadow
System Control Register Setup
Wait for data transfer to end
Set START_STOPBM bit
R_OR_WCTR bit Setup
17-36
Start
End
1 Sector → 0x0001
512 Bytes → 0x0100
Toshiba RISC Processor
TX4939
17
17

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