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ATA6603-PLQW Datasheet(PDF) 8 Page - ATMEL Corporation |
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ATA6603-PLQW Datasheet(HTML) 8 Page - ATMEL Corporation |
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8 / 362 page  8 4921C–AUTO–01/07 ATA6602/ATA6603 3.3.13 Modes of Operation Figure 3-2. Modes of Operation 3.3.13.1 Normal Mode This is the normal transmitting and receiving mode. The voltage regulator is in normal mode and can source 50 mA. The undervoltage detection is activated. The watchdog needs a trigger signal from PTRIG or NTRIG to avoid resets at NRES. 3.3.13.2 Silent Mode A falling edge at EN while TXD is high switches the IC into Silent Mode. The TXD signal has to be logic high during the Mode Select window (see Figure 3-3 on page 9). For EN and TXD either two independent outputs can be used, or two outputs from the same microcontroller port; in the second case, the mode change is only one command. In Silent Mode, the transmission path is disabled. Supply current from V Bat is typically IVSsi = 40 µA with no load at the VDD regulator. The overall supply current from V Bat is the addition of 40 µA plus the VDD regulator output current I VDDs. Pre-normal Mode VCC: 5V/50 mA with undervoltage monitoring Communication: OFF a b Silent Mode VCC: 5V ±7%/50 mA with undervoltage monitoring Communication: OFF EN = 1 Go to silent command EN = 0 TXD = 1 Local wake-up event a: VS > 5V b: VS < 4V c: Bus wake-up event d: NRES switches to low e: Wake-up from wake-up switch b EN = 1 b c + d + e Normal Mode VCC: 5V ±2%/50 mA with undervoltage monitoring Communication: ON Unpowered Mode VBatt = 0 Sleep Mode VCC: switched off Communication: OFF Go to sleep command Local wake-up event EN = 0 TXD = 0 EN = 1 b c + e d |
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