imx6Q,BCLK not work

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imx6Q,BCLK not work

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liupeiliu
Contributor I
1 The burst clock runs whenever ACLK is active (independent of chip select configuration)

I tried activating the BCLK continuously on my i.MX6Q board by setting ('1') the BCM bit (bit 0) on the EIM_WCR (0x021B_8090h) register.

I am not getting any clock on BLCK - constant '0'.

Did I forget anything?

here is my register configuration

MX6Q_PAD_EIM_BCLK__WEIM_WEIM_BCLK,  //pin_conf

writel(0x00020081, ram_reg);       //EIM_CS0GCR1 

writel(0x00000001, ram_reg + 0x90);  // EIM_WCR

someone help me ,what should i do to solve this problem??pastedImage_1.png

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Yuri
NXP TechSupport
NXP TechSupport

Hello,

 

1.

  What is content of the following registers?

 

1.1.

  IOMUXC_SW_MUX_CTL_PAD_EIM_BCLK Pad Mux Register

at address: 0x020E_0158

 

1.2.

  IOMUXC_SW_PAD_CTL_PAD_EIM_BCLK Pad Control Register

at address: 0x020E_046C

 

 

2.

  According section 22.5.4 [Burst Clock Divisor (BCD)] of i.MX 6Dual/6Quad Applications Processor Reference Manual, Rev. 4, 09/2017:

“The BCM bit is used mainly for system debug mode. It has no functional use of the EIM in normal mode.” Note, the i.MX6 D/Q does not have special PLL for providing continuous BCLK, synchronized with internal (system bus) ACLK. This feature is supported in i.MX6 S/DL. So, for i.MX6 DQ we cannotguarantee, that BCLK in continuous mode is fully synchronized with ACLK.

 

 

Have a great day,

Yuri

 

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121 Views
liupeiliu
Contributor I

hello 

  IOMUXC_SW_MUX_CTL_PAD_EIM_BCLK Pad Mux Register

at address: 0x020E_0158

  IOMUXC_SW_PAD_CTL_PAD_EIM_BCLK Pad Control Register

at address: 0x020E_046C

these two Register value is reset value ,i  printed out the contents of the register,MUX_CTL_PAD(0158h) is 0 , PAD_CTL_PAD(046ch) is b0b1.

“The BCM bit is used mainly for system debug mode. It has no functional use of the EIM in normal mode.” 

How do I set my board debug mode?

This feature is supported in i.MX6 S/DL. So, for i.MX6 DQ we cannotguarantee?

What does this mean?  the i.mx6Q does not supported??

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