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参数资料
型号： 71M6531D-IM/F
厂商： TERIDIAN SEMICONDUCTOR CORP
元件分类： 电源管理
英文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC68
封装： LEAD FREE, QFN-68
文件页数： 73/120页
文件大小： 2477K
代理商： 71M6531D-IM/F
Data Sheet 71M6531D/F-71M6532D/F
FDS 6531/6532 005
56
2005-2010 TERIDIAN Semiconductor Corporation
v1.3
2.3
Battery Modes
Shortly after system power (V3P3SYS) is applied, the part will be in MISSION mode. MISSION mode
means that the part is operating with system power and that the internal PLL is stable. This mode is the
normal operation mode where the part is capable of measuring energy.
When system power is not available (i.e. when V1<VBIAS), the 71M6531 will be in one of three battery
modes: BROWNOUT, LCD, or SLEEP mode. Figure 21 shows a state diagram of the various operation
modes, with the possible transitions between modes. For information on the timing of mode transitions
refer to Figure 22 through Figure 24.
Figure 21: Operation Modes State Diagram
When V1 falls below VBIAS or the part wakes up under battery power, the part will automatically enter
BROWNOUT mode (see Section 2.5 Wake-Up Behavior). From BROWNOUT mode, the part may enter
either LCD mode or SLEEP mode, as controlled by the MPU via the I/O RAM bits LCD_ONLY and SLEEP.
The transition from MISSION mode to BROWNOUT mode is signaled by the IE_PLLFALL interrupt flag
(SFR 0xE8[7]). The transition in the other direction is signaled by the IE_PLLRISE interrupt flag (SFR
0xE8[6]), when the PLL becomes stable.
Meters that do not require functionality in the battery modes, e.g. meters that only use the SLEEP
mode to maintain the RTC, still need to contain code that brings the chip from BROWNOUT
mode to SLEEP mode. Otherwise, the chip remains in BROWNOUT mode once the system
power is missing and consumes more current than intended.
Similarly, meters equipped with batteries need to contain code that transitions the chip to SLEEP
mode as soon as the battery is attached in production. Otherwise, remaining in BROWNOUT
mode would unnecessarily drain the battery.
V3P3SYS
rises
V3P3SYS
falls
MISSION
BROWNOUT
LCD
SLEEP or
V1 > VBIAS
V1 <= VBIAS
LCD_ONLY
RESET &
VBAT_OK
RESET
IE_PLLRISE
IE_PLLFALL
IE_PB
IE_WAKE
PB
timer
PB
RESET &
V3P3SYS
rises
V3P3SYS
rises
VBAT_OK
SLEEP
相关PDF资料
PDF描述
71M6532F-IGTR/F 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP100
71M6534-IGT/F SPECIALTY ANALOG CIRCUIT, PQFP120
71M6534H-IGTR/F SPECIALTY ANALOG CIRCUIT, PQFP120
71M6533H-IGTR/F SPECIALTY ANALOG CIRCUIT, PQFP100
71M6534-IGTR/F SPECIALTY ANALOG CIRCUIT, PQFP120
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