DS2465 MAXIM [Maxim Integrated Products], DS2465 Datasheet - Page 21

• Manufacturer Part Number: DS2465
• Description: SHA-256 Coprocessor with 1-Wire Master Function
• Manufacturer: MAXIM [Maxim Integrated Products]

Table 25. Parameter Byte Bitmap
X = Don’t care
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.
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
I
Command Duration
1-Wire Activity
Read Pointer Position
Master Status Bits Affected
Master Configurations Affected
1-Wire Port Configurations Affected
2
C Busy Duration
BIT 7
X
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BIT 6
X
BIT 5
E1h
Block size (Table 25)
from a secure 1-Wire memory device.
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 t
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 t
1WS, APU apply
t
REC0
, t
W1L
BIT 4
, and R
SLOT
WPU
+ maximum 1.09µs, counted from rising SCL edge of the
current values apply.
BIT 3
SLOT
).
BS
BIT 2
BIT 1
To read memory data
DS2465
BIT 0