TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 96

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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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CG
5.2. Master Clock Generator
Internal Clock generator generates all necessary clocks out of 20 MHz source clock. There are two 20 MHz clock input
terminals, such as MSTCLK and MSTCLK2. MSTCLK input is for generating ATA100 (100 MHz), PCICLK (66.6 MHz),
CPUCLK (333 or 400 MHz), and the rest of clocks except UART and audio sampling clock. This clock generator has
SSCG modulator to provide spread spectrum clock for reducing EMI of the system.
MSTCLK2 input is connected MCLK generator that generates Baud-rate clock for UART and two sets of audio sampling
clocks. Figure 5-2 is the simplified diagram of master clock generator.
Rev. 3.1 November 1, 2005
Async. RST
MSTCLK2
20 MHz
MSTCLK
20MHz
Boot Config.
RESET*
iBP_PLL
SSCG
Async. RST
CKIN
SSCGEN
CKIN
AR
BP_PLL
Pad_RST
SSCGEN
0
1
CKIN
AR
SSCG
FN
BP
Strength
0.5 %
Modulation
PLL#2
Disabled
PLL#2
FN
BP
ND[4:0]
Figure 5-2 Master Clock Generator
40 KHz
FS[0]
Freq.
PLL#3
CKOUT
PLL#3
CN
CK
CPUCLK
CG for
ND[4:0]
FS[0]
MCLK GEN
CN
CK
FN
BP
PLL#1
5-2
PLL#1
400 MHz
ND[4:0]
FS[0]
CN
CK
CKIN
RESET_INT
BAUD Gen2
IMBUSCLK
GBUSCLK
DDRCLK
CPUCLK
SYSCLK
RCLK2
RCLK3
RCLK4
Divider
Clock
BAUD
CLKA
CLKB
4MHz
333 / 400 MHz
166 / 200 MHz
166 / 200 MHz
Programmable
GBUSCLK / 2
GBUSCLK / 3
GBUSCLK / 4
30 - 100 MHz
Toshiba RISC Processor
BAUD2
100 MHz
66 MHz
RESET_INT
IMBUSCLK
GBUSCLK
DDRCLK
ATA100
CPUCLK
SYSCLK
PCI66S
RCLK2
RCLK3
RCLK4
UART
UART
CIR
I2S
I2S
Rev 2.22
TX4939
5
5
5
5

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