Rainbow-electronics DS2404 Manuel d'utilisateur Page 20
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- Table des matières
- MARQUE LIVRES
- EconoRAM Time Chip 1
- DETAILED PIN DESCRIPTION 2
- OVERVIEW 2
- DS2404 BLOCK DIAGRAM Figure 1 3
- COMMUNICATION PORTS 3
- PARASITE POWER 4
- 64-BIT LASERED ROM 4
- 64-BIT LASERED ROM Figure 2 4
- 1-WIRE CRC CODE Figure 3 4
- MEMORY MAP Figure 4 5
- TIMEKEEPING 6
- Real-Time Clock 6
- Interval Timer 6
- Cycle Counter 6
- Alarm Registers 7
- STATUS/CONTROL REGISTERS 7
- Status Register 7
- Control Register 7
- MEMORY FUNCTION COMMANDS 8
- ADDRESS REGISTERS Figure 5 9
- Read Scratchpad Command [AAh] 9
- Copy Scratchpad [55h] 9
- 10 of 29 10
- Read Memory [F0h] 11
- MEMORY FUNCTION EXAMPLES 11
- 12 of 29 12
- WRITE PROTECT CHART Figure 7 13
- 1-WIRE BUS SYSTEM 13
- HARDWARE CONFIGURATION 13
- 14 of 29 14
- Match ROM [55h] 15
- Skip ROM [CCh] 15
- Search ROM [F0h] 15
- Search Interrupt [ECh] 15
- (See Figure 8) 16
- 1-WIRE SIGNALING 17
- READ/WRITE TIME SLOTS 17
- Write-one Time Slot 18
- Write-zero Time Slot 18
- Read-data Time Slot 18
- Interrupts 19
- TYPE 1 INTERRUPT Figure 12 20
- TYPE 2 INTERRUPT Figure 14 20
- 3-WIRE I/O COMMUNICATIONS 21
- POWER CONTROL 21
- Operate Mode (Battery-Backed) 22
- OPERATE MODE Figure 16 22
- Battery Operate Mode 23
- DEVICE OPERATION MODES 23
- DUAL PORT OPERATION 24
- 25 of 29 25
- 26 of 29 26
- RST Logic 1 26
- = 25°C) 27
- =2.8 to 5.5V) 27
- 28 of 29 28
- IRQ pins only 28
- 29 of 29 29
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