DS2408 Maxim, DS2408 Datasheet - Page 13

• Manufacturer Part Number: DS2408
• Description: The DS2408 is an 8-channel, programmable I/O 1-Wire® chip
• Manufacturer: Maxim

Figure 8-1. CONTROL FUNCTIONS FLOW CHART
N
TA1 (T7:T0), TA2 (T15:T8)
Bus Master TX Control
Function Command
Read PIO Reg.?
Bus Master TX
Address
< 90h?
F0h
ments Address
DS2408 Incre-
Bus Master
RX “1”s
Counter
Y
N
Y
Y
Bus Master RX Data Byte
N
Bus Master RX CRC16
of Command, Address,
from Register Address
DS2408 sets Register
Flow Chart (Figure 12)
13 of 39
Address = (T15:T0)
To ROM Functions
Note:
To read the three PIO state and latch
register bytes, the target address should
be 0088h. Returned data for a target
address <0088h is undefined.
Flow Chart (Figure 12)
From ROM Functions
TX Reset?
TX Reset?
Data Bytes
TX Reset?
N
Address
Address
= 88h?
Master
< 90h?
Master
Master
N
N
N
Y
Y
Y
Y
DS2408 Samples
PIO Pin Status
From Figure 8
To Figure 8
Note 1)
See the command
description for the
exact timing of the
PIO pin sampling.
2
2
nd
nd
Part
Part
1)
DS2408