DS1922T Maxim, DS1922T Datasheet - Page 31
DS1922T
Manufacturer Part Number
DS1922T
Description
The DS1922L/T temperature logger iButtons® are rugged, self-sufficient systems that measure temperature and record the result in a protected memory section
Manufacturer
Maxim
Datasheet
1.DS1922L.pdf
(52 pages)
- Current page: 31 of 52
- Download datasheet (709Kb)
Figure 9a. Memory/Control Function Flowchart
SCRATCHPAD
INCREMENTS
DS1922
OFFSET
N
Y
Y
CONTROL FUNCTION COMMAND
SCRATCHPAD OFFSET = [T4:T0]
COMMAND, ADDRESS DATA
TO SCRATCHPAD OFFSET
MASTER Tx MEMORY OR
MASTER Tx DATA BYTE
MASTER Rx CRC-16 OF
DS1922 SETS [E4:E0] =
SCRATCHPAD OFFSET
WRITE SCRATCHPAD?
AND CLEARS (PF, AA)
MASTER Tx RESET?
MASTER Tx RESET?
MASTER Tx RESET?
OFFSET = 11111b?
MASTER Rx "1"s
SCRATCHPAD
DS1922 SETS
TA2 [T15:T8]
MASTER Tx
TA1 [T7:T0]
MASTER Tx
______________________________________________________________________________________
0Fh
Y
N
Y
N
N
Temperature Logger iButton with 8KB
BYTE WRITTEN?
N
Y
PARTIAL
N
FLOWCHART (FIGURE 11)
FROM ROM FUNCTIONS
Y
PF = 1
SCRATCHPAD
INCREMENTS
DS1922
OFFSET
N
Y
SCRATCHPAD OFFSET = [T4:T0]
E/S BYTE, AND DATA STARTING
MASTER Rx DATA BYTE FROM
FLOWCHART (FIGURE 11)
COMMAND, ADDRESS DATA,
MASTER Rx ENDING OFFSET
AT THE TARGET ADDRESS
TO ROM FUNCTIONS
MASTER Rx CRC-16 OF
SCRATCHPAD OFFSET
READ SCRATCHPAD?
WITH DATA STATUS
MASTER Tx RESET?
MASTER Tx RESET?
OFFSET = 11111b?
MASTER Rx "1"s
SCRATCHPAD
DS1922 SETS
TA2 [T15:T8]
MASTER Rx
TA1 [T7:T0]
MASTER Rx
(E/S)
AAh
Y
N
Y
N
N
Y
MASTER Rx "1"s
Data-Log Memory
N
N
DS1922 COPIES SCRATCHPAD
TA1 [T7:T0], TA2 [T15:T8]
64 BITS [PASSWORD]
COPY SCRATCHPAD
MASTER Tx RESET?
MASTER Tx RESET?
DATA TO MEMORY
AUTHORIZATION
CODE MATCH?
DS1922 Tx "0"
DS1922 Tx "1"
PASSWORD
ACCEPTED?
MASTER Tx
MASTER Tx
MASTER Tx
[WITH PW]
E/S BYTE
COPYING
FINISHED
AA = 1
99h
Y
Y
Y
Y
N
Y
N
N
N
Y
MASTER Tx RESET?
MASTER Rx "1"s
AUTHORIZATION
CODE
Y
FROM FIGURE 9b
TO FIGURE 9b
N
31
Related parts for DS1922T
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
The DS5250 is a highly secure, four clocks-per-machine cycle, 100% 8051-instruction-set-compatible microprocessor in Maxim's secure microcontroller family
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
The MAX9263/MAX9264 chipset extends Maxim's gigabit multimedia serial link (GMSL) technology to include high-bandwidth digital content protection (HDCP) encryption for content protection of DVD and Blu-ray™ video and audio data
Manufacturer:
Maxim
Part Number:
Description:
The Maxim MXL1016 (10ns, typ) high-speed, complementary-output comparator is designed specifically to
interface directly to TTL logic while operating from
either a dual ±5V supply or a single +5V supply
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's DG300–DG303 and DG300A–DG303A CMOS dual and quad analog switches combine low power operation with fast switching times and superior DC and AC switch characteristics
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's DG300–DG303 and DG300A–DG303A CMOS dual and quad analog switches combine low power operation with fast switching times and superior DC and AC switch characteristics
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's DG300–DG303 and DG300A–DG303A CMOS dual and quad analog switches combine low power operation with fast switching times and superior DC and AC switch characteristics
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's DG300–DG303 and DG300A–DG303A CMOS dual and quad analog switches combine low power operation with fast switching times and superior DC and AC switch characteristics
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG401/DG403/DG405 analog switches now feature guaranteed low on-resistance matching between switches (2Ω max) and guaranteed on-resistance flatness over the signal range (3Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG401/DG403/DG405 analog switches now feature guaranteed low on-resistance matching between switches (2Ω max) and guaranteed on-resistance flatness over the signal range (3Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG401/DG403/DG405 analog switches now feature guaranteed low on-resistance matching between switches (2Ω max) and guaranteed on-resistance flatness over the signal range (3Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG406 and DG407 CMOS analog multiplexers now feature guaranteed matching between channels (8Ω max) and flatness over the specified signal range (9Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG406 and DG407 CMOS analog multiplexers now feature guaranteed matching between channels (8Ω max) and flatness over the specified signal range (9Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG408 and DG409 CMOS analog multiplexers now feature guaranteed matching between channels (8Ω max) and flatness over the specified signal range (9Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG408 and DG409 CMOS analog multiplexers now feature guaranteed matching between channels (8Ω max) and flatness over the specified signal range (9Ω max)
Manufacturer:
Maxim
Datasheet:
Part Number:
Description:
Maxim's redesigned DG411/DG412/DG413 analog switches now feature low on-resistance matching between switches (3Ω max) and guaranteed on-resistance flatness over the signal range (Δ4Ω max)
Manufacturer:
Maxim
Datasheet: