Rainbow Electronics DS28EA00 - Manual (Page 13)

DS28EA00 1-Wire Digital Thermometer with Sequence Detect and PIO
13 of 29
Figure 10-1. Control Function Flow Chart
From Figure 10
2
nd
Part
To Figure 10
2
nd
Part
Y
N
BEh
Read Scratch-
pad?
Y
N
4Eh
Write Scratch-
pad?
To ROM Functions
Flow Chart (Figure 12)
Master TX data
byte to scratchpad
DS28EA00 sets
byte address = 2
DS28EA00 incre-
ments byte address
N
Y
Byte
Address = 4?
N
Y
Master
TX Reset?
Y
N
Master
TX Reset?
Master RX byte
from scratchpad
DS28EA00 sets
byte address = 0
DS28EA00 incre-
ments byte address
N
Y
Byte
Address = 7?
N
Y
Master
TX Reset?
Master RX 8-bit
CRC of data
N
Y
Master
TX Reset?
Master RX “1s“
Bus Master TX Control
Function Command
From ROM Functions
Flow Chart (Figure 12)