TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 370

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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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PCIC
16.3.4. Sample PCI Adapter Configuration
Figure 16-3 shows example of PCI Adapter system by the TX4939 with Satellite Mode.
In this configuration, the TX4939 is in Satellite Mode and PCI BOOT is activated.
After PCI Host (ASIC SoC) configured PCI BOOT Device by mapping the part of Boot ROM as memory device on PCI
Memory Space (i.e. 0xFFFE_0000 – 0xFFFF_FFFF), PCI Host might release RESET_OUT for the TX4939.
Then the TX4939 will boot from CPU address 0x1FC0_0000, which internally mapped to 0xFFFE_0000 of the PCI Memory
Space.
The TX4939 needs 20MHz Clock as master clock. This master clock can be modulated by internal SSCG (Spread
Spectrum Clock Generator), then generates 400MHz fixed clock first. A 100MHz and 66.66MHz clock will be derived from
this 400 MHz for ATA100 and PCI.
The TX4939 has 6 PCI Clock output (Service Clock either 33 MHz or 66 MHz). This internal 66.66 MHz clock is fed to
second PLL, which generates CPU, GBUS, DDR, and External bus clocks. CPU pipeline clock can be any frequency
integer multiple of 33.33 MHz and range is from 266.66 MHz to 400 MHz.
Rev. 3.1 November 1, 2005
33MHz
Boot ROM
128KB - TX
384KB - SoC
CG
512KB
DEVICE
DEVICE
DEVICE
DEVICE
33 MHz
PCI Host
ASIC SoC
MSTCLK
PCI Adapter 1
ASIC
RESET_OUT
Figure 16-3 Block Diagram of Sample PCI Adapter
PCICLKOUT
PCI ADXX
PCI CTL
PCICLK
REQ1#
REQ2#
RESET
GNT1#
GNT2#
IDSEL
INTA#
INTB#
INTA#
REQ#
GNT#
PCI ADXX
PCI CTL
16-6
20MHz
CG
MSTCLK
PCI CTL
PCI ADXX
IDSEL (GNT[1]*)
REQ[0]#
GNT[0]#
INTOUT (REQ[1]*)
PCICLK_IN
MSTReset
PCICLK(OUT)
TX4939
Service Clock
SSCG
ATA100
HDD
PCI Adapter 2
PLL
PLL
PCMCIA
ATA100
(EIDE)
Toshiba RISC Processor
MII (1ch)
RMII (2ch)
x32
x16
x16
x16
USB 2.0
Ethernet
MAX232
Device
NAND ROM
PHY
NOR ROM
SDRAM
128MB
64MB
64MB
DDR
REV 1.01
TX4939
16
16

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