DS2465P Просмотр технического описания (PDF) - Maxim Integrated

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DS2465P

SHA-256 Coprocessor with 1-Wire Master Function

Maxim Integrated 

ABRIDGED DATA SHEET

DS2465

SHA-256 Coprocessor with 1-Wire Master Function

Table 7. Parameter Byte Bitmap

BIT 7

S/U

X = Don’t care

BIT 6

X

BIT 5

TT

BIT 4

BIT 3

F/S

BIT 2

Refer to the full data sheet for this information.

BIT 1

SEG#

BIT 0

Bits 5:4: Target (TT). These bits specify the user memory page number (S/U = 1) to which the scratchpad data is to

be copied.

For S/U = 1, the assignments are:

00 User page 0

01 User page 1

10 (reserved)

11 (reserved)

Bit 3: Full or segment copy (F/S). This bit is relevant only is S/U = 1. It specifies whether the entire page is pro-

grammed or only the segment selected by SEG#. If F/S = 0, the entire page is programmed. If F/S = 1, only the selected

segment is programmed. If one block of a targeted page is write protected then the F/S bit is forced to 1.

Bits 2:0: Segment Number (SEG#). These bits are relevant only if (S/U = 1) and (F/S = 1). They specify the segment

of the selected user memory page to be programmed with scratchpad data. All codes are valid. The code 000b refers

to the first four bytes of the page, etc.

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