TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 687

• Manufacturer Part Number: TX4939XBG-400
• Manufacturer: Toshiba

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

SRAM
25.1. Characteristics
The TX4939 has 1-channel of on-chip, fast 2-KB SRAM. You can map it to any address space by setting the Base
Address Register. You can access SRAM from each G-Bus Master: the TX49/H4 core, DMAC0, DMAC1, PCI0, and PCI1.
25.2. Block diagram
1 : On-chip SRAM does not support special Burst access (address decrementing/fixed) of DMAC0, DMAC1.
Rev. 3.1 November 1, 2005
2 KB
Specifiable base address
Accessible in Byte, half-word, word, or double-word units
Supports Burst access1
×
1 channel
G-Bus
Figure 25-1 On-chip SRAM Block Diagram
G-Bus I/F
25-1
On-chip SRAM
Chapter 25. On-Chip SRAM
Memory
2 KB × 1
Toshiba RISC Processor
TX4939
25
25
25
25