ARM ARM DUI 0224I manual Default value of HCLKCTRL70 is 0xE0, HCLKM1 selection, HCLKM2 selection

Models: ARM DUI 0224I

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Hardware Description

Table 3-7 to Table 3-9 on page 3-48 list the source of the bridge clocks for different

values of the HCLKCTRL[7:0] signals (from SYS_CONFIGDATA1[23:16]). The

default value of HCLKCTRL[7:0] is 0xE0.

 

 

 

 

Table 3-7 HCLKM1 selection

 

 

 

HCLKCTRL signal

 

 

[4]

[0]

[1]

[5]

HCLKM1 driven by:

 

 

 

 

 

1

1

X

X

GLOBALCLK (driven from tile,

 

 

 

 

nGLOBALCLKEN pulled HIGH)

 

 

 

 

 

1

0

X

X

GLOBALCLK (driven from OSC0)

 

 

 

 

 

0

X

1

X

HCLKM1L2S and HCLKM1L2F (from tile)

 

 

 

 

 

0

X

0

1

OSC0 (default)

 

 

 

 

 

0

X

0

0

OSC1

 

 

 

 

 

 

 

 

 

Table 3-8 HCLKM2 selection

 

 

 

HCLKCTRL signal

 

 

[4]

[0]

[2]

[6]

HCLKM2 driven by:

 

 

 

 

 

1

1

X

X

GLOBALCLK (driven from tile,

 

 

 

 

nGLOBALCLKEN pulled HIGH)

 

 

 

 

 

1

0

X

X

GLOBALCLK (driven from OSC0)

 

 

 

 

 

0

X

1

X

HCLKM2L2S and HCLKM2L2F (from tile)

 

 

 

 

 

0

X

0

1

OSC0 (default)

 

 

 

 

 

0

X

0

0

OSC2

 

 

 

 

 

ARM DUI 0224I

Copyright © 2003-2010 ARM Limited. All rights reserved.

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Page 109
Image 109
ARM ARM DUI 0224I manual Default value of HCLKCTRL70 is 0xE0, HCLKM1 selection, Hclkctrl signal HCLKM1 driven by