TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 72
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
Available stocks
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BLOCK
Rev. 3.1 November 1, 2005
ATA 100 EIDE interface
□ Have on-chip 2-channel ATA 100 EIDE interface
□ Up to 100MB/s Data Transfer x 1 channel
□ Up to 2 EIDE devices each
□ Compliant with ATA/ATAPI-6
□ Can become the Bus Master and transfer data to external memory
□ Can select data bus widths of 16/32/64 bits
□ Has 16 x 64-bits transmit FIFO and 16 x 64-bits receive FIFO
□ Supports Scatter gather DMA (same as TC86C001F)
□ Similar software visibility with TC86C001F
Dual Ether MAC (EMAC) (same as TX4938 but Media Independent Interface is RMII)
Has on-chip Dual Ether MAC.
□ Equivalent to the TC35815 except Media Independent Interface (RMII).
□ Supports transfer rates of 100 Mbps and 10 Mbps.
□ Employs the IEEE Std 802.3 standard CSMA/CD format when in the half duplex transfer mode.
□ Employs IEEE Std 802.3x standard MAC control and Pause operation for flow control when in the full duplex
□ RMII (Reduced Media Independent Interface).
Extended EJTAG Interface
The TX4939 Extended EJTAG (Extended Enhanced Joint Test Action Group) Interface provides two functions.
The first function is IEEE1149.1 standard compliant JTAG boundary scan testing. The second function is
real-time debugging by a Debugging Support Unit (DSU) that is built into the TX49/H4 core.
□ IEEE1149.1 JTAG Boundary Scan
□ Can perform execution control (run, break, step, register/memory access) as a real-time debugging function
□ PC-Trace dedicated pins are multiplexed with some of Video port signal pins.
□ Tamper protection for EJTAG access.
transfer mode.
that uses dedicated emulation probes and can use PC traces.
2-8
Toshiba RISC Processor
TX4939
2
2
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