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STPCI2GDY Datasheet(PDF) 8 Page - STMicroelectronics

Part No. STPCI2GDY
Description  X86 Core PC Compatible System-on-Chip for Terminals
Download  111 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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STPCI2GDY Datasheet(HTML) 8 Page - STMicroelectronics

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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
ISACLK
1/4
DEVCLK
DEVCLK
(24MHz)
PLL
(14MHz)
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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