DS2432 Maxim, DS2432 Datasheet - Page 9

• Manufacturer Part Number: DS2432
• Description: The DS2432 combines 1024 bits of EEPROM, a 64-bit secret, an 8-byte register/control page with up to five user read/write bytes, a 512-bit SHA-1 engine, and a fully-featured 1-Wire interface in a single chip
• Manufacturer: Maxim

ABRIDGED DATA SHEET
ROM FUNCTIONS FLOW CHART Figure 9
Bus Master TX ROM
Function Command
Serial Number
Family Code
Command ?
Read ROM
DS2432 TX
DS2432 TX
DS2432 TX
CRC Byte
(6 Bytes)
(1 Byte)
RC = 0
33h
From Memory and SHA-1
Functions Flow Chart
Y
(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
To Memory and SHA-1 Functions
Presence Pulse
Bus Master TX
Reset Pulse ?
DS2432 TX
Reset Pulse
Y
N
N
N
N
Flow Chart (Figure 7)
OD
9 of 17
N
N
N
DS2432 TX Bit 63
DS2432 TX Bit 63
DS2432 TX Bit 0
DS2432 TX Bit 0
DS2432 TX Bit 1
DS2432 TX Bit 1
Master TX Bit 63
Master TX Bit 0
Master TX Bit 1
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
Command ?
Skip ROM
From Figure 9, 2
RC = 0
CCh
Y
From Figure 9
To Figure 9
To Figure 9
2
2
2
nd
nd
nd
Part
Part
Part
nd
N
Part
DS2432