DS1993 Maxim, DS1993 Datasheet - Page 12

• Manufacturer Part Number: DS1993
• Description: The DS1992/DS1993 memory iButtons (hereafter referred to as DS199_) are rugged read/write data carriers that act as a localized database, easily accessible with minimal hardware
• Manufacturer: Maxim

Figure 9. ROM FUNCTIONS FLOW CHART
Serial Number
Family Code
DS199x TX
DS199x TX
DS199x TX
Read ROM
Command
CRC Byte
6 Bytes
1 Byte
33H
?
Y
N
Master TX Bit 63
Master TX Bit 0
Master TX Bit 1
Match ROM
Command
Match ?
Match ?
Match ?
Bit 63
Bit 0
Bit 1
55H
?
Y
Y
Y
Y
N
N
N
N
N
N
N
Function Command
12 of 17
Function Command
Master TX Memory
DS199x TX Bit 63
DS199x TX Bit 63
Master TX Bit 63
DS199x TX Bit 0
DS199x TX Bit 0
Master TX Bit 0
DS199x TX Bit 1
DS199x TX Bit 1
Master TX Bit 1
Master TX ROM
Presence Pulse
DS199x TX
Search ROM
Reset Pulse
Master TX
Command
Match ?
Match ?
Match ?
Bit 63
F0H
Bit 0
Bit 1
?
Y
Y
Y
Y
N
Command
Skip ROM
CCH
?
Y
N
DS1992/DS1993