4.6 Packet Commands
Page Control (PC) defines the type of the page descriptor to transmit.
Table 4.71 Page Control field
Bit 7 | Bit 6 | Parameter type |
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0 | 0 | Current value |
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0 | 1 | Changeable value |
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1 | 0 | Default value |
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1 | 1 | Save value |
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Page Code defines the page descriptor to transfer. When 3Fh is specified, all page descriptors are transferred. For the supported page descriptors, see Table 4.46, "Mode Parameters."
Mode pages are transferred in ascending order by page code, except for the drive operation mode page (00h). The drive operation mode page (00h) is transferred last.
Table 4.72 Mode Parameter List
Bit | 7 | 6 | 5 |
| 4 | 3 |
| 2 | 1 | 0 |
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| Mode Parameter Header |
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| Page Descriptor(s) |
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The mode parameter list consists of a mode parameter header and page descriptor. Table 4.73 shows the mode parameter header format.
Table 4.73 Mode Parameter Header
Bit | 7 | 6 | 5 | 4 |
| 3 | 2 | 1 | 0 |
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| Mode Data Length |
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2 |
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3 | WP |
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| Reserved |
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| Reserved |
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Medium Type Code returns the following values:
-03h for normal FRAM (MO) media
-07h for overwrite FRAM media
-01h for FROM media