TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 69
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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BLOCK
Rev. 3.1 November 1, 2005
External Bus Interface
the External bus has 8/16-bit data bus.
address signals
□ 8/16-bit External bus operation with DMA assistance
□ Direct Address SA [5:0] + Latched from SADB[15:0] + Latched from SA[5:0]
□ 4 independent channels
□ Supports access to ROM (mask ROM, page mode ROM, EPROM, EEPROM), SRAM,
□ Selectable 1/3, 1/4, 1/5, and 1/6 of GBUS/DDRCLK for SYSCLK
□ Supports the External Acknowledge Signal (ACK*) and External Ready Signal modes
□ NAND Flash Controller with DMA burst transfer mode.
□ Boot setting can be made from the following selections:
□ 3 channels of DMA are provided.
PCI Controller
Has an on-chip PCI Controller that complies with PCI External Bus Specification Revision 2.2.
□ Complies with PCI External Bus Specification Revision 2.2.
□ 32-bit PCI interface with maximum PCI clock frequency of 66 MHz.
□ Supports both the target and initiator functions.
□ Can change the address mapping between the internal bus and the PCI Bus.
□ Has an on-chip PCI Bus arbiter. Can connect up to 6 external bus masters each.
□ Has on-chip 1-channel DMA Controller dedicated to the PCI Controller (PCMAC).
□ Support Satellite Mode
□ Support PCI Boot
Serial I/O Port (SIO)
Has on-chip 4-channel asynchronous Serial I/O Interface (full duplex SIO ).
□ Full duplex SIO
□ On-chip baud rate generator
□ FIFO
Channel 0 for NOR Flash
Channel 1-3 for user peripherals
flash memory and I/O peripherals
- Data bus width: 8-bit or 16-bit
- ACK* output or ACK* input
- BWE pin (byte enable or byte Write enable)
- Boot channel clock frequency
PCI BOOT address moved to 0xFFFE_0000
On-chip 8-bit
On-chip 13-bit
16-bit bus mode
8-bit bus mode
×
×
8-stage FIFO for transmission
16-stage FIFO (data: 8 bits, status: 5 bits) for reception
×
4 channels
Address bus consists of 6 dedicated and 16+3 external latched
A[21:6] can be latched from SADB[15:0]
A[27:22] can be latched from SA[5:0]
A[28:23] can be latched from SA[5:0]
A[22:7] can be latched from SADB[15:0]
2-5
Toshiba RISC Processor
4 MB
256 MB
8 MB
512 MB
TX4939
2
2
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