W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 16

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

5
5.1 Clock Module and PLL
5.1.1 Block Diagram
Figure 5.1.1 Block diagram of clock generation circuit.
5.1.2 Features
¨
W90221X version 0.6
T_GFXCLK
CPUCLKx2
Single 27MHz oscillator to generate all clock sources
T_DPCLK
T_VCLK
MEGACELLS
PLL input clock (13.5MHz)
CPU clock range : 80 MHz, 90 MHz, 100 MHz
1/2
PLLOSC
GFX Power-saving mode ?
Video-In bus Enable ?
PLL
1/ 6,8,10,12
1/ 2,3,4
PLL_sel
TV/Monitor/Test/Power -saving
1/2
1/4
1/2
1/2
PLL_sel
PLL_sel
PLL_sel
OSC_ext
PLLout
1
0
1
1
1
1
1
0
0
0
0
0
STDCLK_sel
STDCLK
1/CKR[]
PLL_sel
1
Delay
1
0
0
CPUCLK_off
SLPCLK
CPUCLKx2
CPUCLK
EXTCLK
MCLK_out
MCLK_ctrl
OSC
PCL
K
DPCL
VCLK
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