DS2465 MAXIM [Maxim Integrated Products], DS2465 Datasheet - Page 18

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

Table 22. Parameter Byte Bitmap
Bit 7:0: Data Byte (DATA). These bits specify the data to be written to the 1-Wire line. The time slot for bit 0 is gener-
ated first.
SHA-256 Coprocessor with 1-Wire Master Function
1-Wire Write Byte
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
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BIT 6
BIT 5
A5h
Data byte (Table 22)
To write commands or data to the 1-Wire line. Equivalent to executing eight 1-Wire
Single Bit commands, but faster due to less I
Writes a single data byte to the 1-Wire line.
1-Wire activity must have ended before the DS2465 can process this command.
Command code is not acknowledged if 1WB = 1 at the time the command code is
received and the command is ignored.
N/A
None
8 O t
byte acknowledge bit.
Begins maximum 1.09µs after the rising SCL edge of the parameter byte
acknowledge bit. Note: The bit order on the I
(1-Wire: LSB first; I
DS2465 has received the full data byte.
1-Wire Master Status register (for busy polling).
1WB (set to 1 for 8 O t
1WS, APU, SPU apply.
t
W0L
SLOT
, t
W1L
BIT 4
+ maximum 1.09µs, counted from the rising SCL edge of the parameter
, t
REC0
DATA
, and R
2
C: MSB first). Therefore, 1-Wire activity cannot begin before the
SLOT
WPU
BIT 3
).
current values apply.
BIT 2
2
2
C traffic.
C bus and the 1-Wire line is different
BIT 1
DS2465
BIT 0