DS80C411 Maxim, DS80C411 Datasheet - Page 25

• Manufacturer Part Number: DS80C411
• Description: The DS80C410/DS80C411 network microcontrollers offer the highest integration available in an 8051 device
• Manufacturer: Maxim

(V
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
OWSTP
OWSTP PIN TIMING
Active Time for Presence Detect
Active Time for Presence Detect Recovery
Active Time for Write 1 Recovery (Notes 2, 3)
Active Time for Write 0 Recovery (Notes 2, 3)
Delay Time for Presence Detect
Delay Time for Presence Detect Recovery (Note 4)
Delay Time for Write 1/Write 0 Recovery
Turn-Off Time for 1-Wire Reset
Turn-Off Time for Write 1/Write 0 (Note 5)
CC3
= 3.0V to 3.6V, V
AC electrical characteristics assume 50% duty cycle for the oscillator, oscillator frequency ≤ 75MHz, and are not 100% production
tested, but are guaranteed by design.
There is no OWSTP timing difference for sending out and receiving bits within a byte. The difference comes when the last bit of the
byte has been completely sent. At this point, the signal is either enabled continuously until the next reset or time slot begins, or
enabled only for active time write 1 or write 0.
When performing a read versus a write time slot, the master provides the same active time for write 1 and write 0. However, the
Schmitt-triggered input from the OW line is sensed every 1µs for a high value. If OW is high, the OWSTP signal is enabled. If the OW
line is low, the OWSTP signal remains disabled until a high state is sensed. In all write time slots, a high is sensed immediately.
This parameter is the time delay until the master begins to monitor the OW pin level. If the line is already high, then OWSTP is
enabled. If not, it waits to enable OWSTP until the next state machine clock (1µs or 50ns) after the OW line recovers.
The very first bit in a byte has an extended turn-off time of 4µs because of the order of states that the 1-Wire master state machine
must go through.
PIN TIMING CHARACTERISTICS
PARAMETER
CC1
= 1.8V ±10%, T
A
= -40°C to +85°C.) (Note 1)
SYMBOL
25 of 102
t
t
t
t
t
t
t
t
t
DLY1
DLY2
DLY3
OFF1
OFF2
ON1
ON2
ON3
ON4
399.2
51.2
MIN
6.4
6.4
0.8
0.8
1.6
0.8
STANDARD
8
MAX
499
10
64
8
8
1
1
2
1
MIN
31.2
0.8
7.2
0.8
0.8
0.8
1.6
0.8
OVERDRIVE
8
MAX
10
39
1
9
1
1
1
2
1
UNITS
µs
µs
µs
µs
µs
µs
µs
µs
µs