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

1-Wire Receive Block

Command Code

Parameter Byte

Usage

Other Notes

Command Restrictions

Error Conditions (Error Response)

MAC Notes

I2C Busy Duration

Command Duration

1-Wire Activity

Read Pointer Position

Master Status Bits Affected

Master Configurations Affected

1-Wire Port Configurations Affected

E1h

Block size (Table 25)

from a secure 1-Wire memory device.

To read memory data

Reads 1 to 63 bytes from the 1-Wire line and makes them accessible from the

scratchpad.

1-Wire activity must have ended before this command can be processed.

Command code is not acknowledged if 1WB = 1 at the time the command code is

received and the command is ignored.

None

None

(1 to 63) O 8 O tSLOT + maximum 1.09µs, counted from rising SCL edge of the

parameter byte acknowledge bit.

Begins maximum 1.09µs after the rising SCL edge of the parameter byte

acknowledge bit.

1-Wire Master Status register (for busy polling).

1WB (set to 1 for 8 O BS O tSLOT).

1WS, APU apply

tREC0, tW1L, and RWPU current values apply.

Table 25. Parameter Byte Bitmap

BIT 7

X

X = Don’t care

BIT 6

X

BIT 5

BIT 4

BIT 3

BIT 2

BS

BIT 1

BIT 0

Bits 5:0: Block Size (BS). These bits specify the number of bytes to be received and written to the Input Scratchpad

starting at location 00h. If BS = 000000b, one byte is received.

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