TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 106

• 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

CG
5.4. Second Baud rate Generator
TX4939 has second baud-rate generator. It generates baud-rate clock out of 100 MHz clock (ATA100 clock). This
baud-rate can be used for UART with non-frequency accurate application such as debug or peripheral control.
This baud-rate generator uses a multiplier-divider that divides by 217 and multiplies by 32. It generates 14.74654377 MHz,
which has 64-PPM error against 14.7456 MHz. In addition, it will be SSCG modulated when SSCGEN signal asserted.
Because of this nature, it is not recommended to use this Baud-rate for communication through MODEM or external line.
But it is suitable to use in the system to control peripherals like LCD panel or remote control equipment.
Rev. 3.1 November 1, 2005
5-12
Toshiba RISC Processor
TX4939
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