STPCI01 查看數據表（PDF） - STMicroelectronics

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STPCI01

PC Compatible Embedded Microprocessor

STMicroelectronics 

STRAP OPTION

2.1.6 HCLK PLL STRAP REGISTER 0 INDEX 5FH (HCLK_STRAP0)

Bits 5-0 of this register reflect the status of pins MD[26:21] respectively.

They are use by the chip as follows:

Bits 7-6, Reserved.

Bits 5-3, These pins reflect the value sampled on MD[26:24] pins respectively and control the Host clock

frequency synthesizer.

Bit 2-1, Reserved.

Bit 0, Reserved.

This register defaults to the values sampled on above pins after reset.

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