DS2465 MAXIM [Maxim Integrated Products], DS2465 Datasheet - Page 16

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

Figure 5. 1-Wire Reset/Presence-Detect Cycle
SHA-256 Coprocessor with 1-Wire Master Function
1-Wire Single Bit
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
V
V
V
IH1
CC
IL1
0V
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t
F
RESET PULSE
PULLUP
t
RSTL
87h
Type of time slot (Table 21)
To perform single-bit writes or reads at the 1-Wire line when single bit
communication is necessary (the exception).
Generates a single 1-Wire time slot as specified by the parameter byte at the 1-Wire
line; reads the logic level at the 1-Wire line at t
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
t
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 and data reading).
1WB (set to 1 for t
1WS, APU, SPU apply.
t
SLOT
W0L
APU CONTROLLED
, t
EDGE
+ maximum 1.09µs, counted from the rising SCL edge of the parameter byte
W1L
, t
REC0
DS2465 PULLDOWN
, and R
SLOT
t
SI
), SBR is updated at t
PRESENCE PULSE
WPU
PRESENCE/SHORT DETECT
current values apply.
t
RSTH
t
MSP
MSR
MSR
1-Wire SLAVE PULLDOWN
, DIR (may change its state).
and updates SBR accordingly.
DS2465