參數(shù)資料
型號: STPCI2GDY
廠商: 意法半導(dǎo)體
英文描述: X86 Core PC Compatible System-on-Chip for Terminals
中文描述: x86內(nèi)核PC兼容系統(tǒng)上的終端芯片
文件頁數(shù): 8/111頁
文件大?。?/td> 1896K
代理商: STPCI2GDY
GENERAL DESCRIPTION
8/111
Issue 1.0 - July 24, 2002
1.7. CLOCK TREE
The STPC Atlas integrates many features and
generates all its clocks from a single 14MHz
oscillator. This results in multiple clock domains as
described in
Figure 1-2
.
The speed of the PLLs is either fixed (DEVCLK),
either programmable by strap option (HCLK)
either programmable by software (DCLK, MCLK).
When in synchronized mode, MCLK speed is fixed
to HCLKO speed and HCLKI is generated from
MCLKI.
Figure 1-2. STPC Atlas clock architecture
Kbd/Mouse
IPC
SDRAM controller
North Bridge
14.31818 MHz
XTALO
XTALI
OSC14M
(14MHz)
ISACLK
1/4
DEVCLK
PLL
DEVCLK
(24MHz)
1/2
UARTs
HCLK
PLL
PCICLKI
PCICLKO
South Bridge
PWM
1/2
1/3
HCLK
DCLK
PLL
MCLK
PLL
DCLK
MCLKI
MCLKO
USB
CRTC,Video,TFT
CPU
x2
VCLK
48MHz
// Port
1/4
1/2
1/26
1/6
VIP
GE, LDE, AFE
PCMCIA
Local Bus
Host
ISA
HCLKI
HCLKO
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