DS28EC20 Maxim, DS28EC20 Datasheet - Page 19

• Manufacturer Part Number: DS28EC20
• Description: The DS28EC20 is a 20480-bit, 1-Wire® EEPROM organized as 80 memory pages of 256 bits each
• Manufacturer: Maxim

Figure 9-1. ROM Functions Flowchart
Bus Master TX ROM
Function Command
DS28EC20 TX
DS28EC20 TX
DS28EC20 TX
Serial Number
Family Code
Command?
Read ROM
CRC Byte
(6 Bytes)
(1 Byte)
RC = 0
33h
From Memory Functions
Y
Flow Chart (Figure 7)
N
Master TX Bit 63
Master TX Bit 0
Master TX Bit 1
Match ROM
Command?
Match?
Match?
Match?
RC = 0
RC = 1
Bit 63
Bit 0
Bit 1
55h
Y
Y
Y
Y
Presence Pulse
DS28EC20 TX
Bus Master TX
Reset Pulse?
Reset Pulse
Y
N
N
N
N
OD
To Memory Functions
Flow Chart (Figure 7)
19 of 27
N
N
N
DS28EC20 TX Bit 1
DS28EC20 TX Bit 1
DS28EC20 TX Bit 0
DS28EC20 TX Bit 0
DS28EC20 TX Bit 63
DS28EC20 TX Bit 63
Master TX Bit 63
Master TX Bit 1
Master TX Bit 0
Search ROM
Command?
Match?
Match?
Match?
RC = 0
RC = 1
N
Bit 63
Bit 0
Bit 1
F0h
OD = 0
Y
Y
Y
Y
N
DS28EC20: 20Kb 1-Wire EEPROM
Command?
Skip ROM
RC = 0
From Figure 9, 2
CCh
Y
From Figure 9,
To Figure 9,
To Figure 9,
2
2
2
nd
N
nd
nd
Part
Part
Part
nd
Part