71M6532D-IGT/F 参数 Datasheet PDF下载

Data Sheet 71M6531D/F-71M6532D/F

FDS 6531/6532 005

In the absence of system power, if the voltage margin for the LDO regulator providing 2.5 V to the internal

circuitry becomes too low to be safe, the part automatically enters sleep mode (BAT_OK false). The bat-

tery voltage must stay above 3 V to ensure that BAT_OK remains true. Under this condition, the

71M6531 stays in SLEEP mode, even if the voltage margin for the LDO improves (BAT_OK true).

Table 47: Available Circuit Functions

Circuit Function

CE

CE Data RAM

FIR

Analog circuits

MPU clock rate

System Power

MISSION

Yes

Yes

Yes

Yes

From PLL, as

defined by

MPU_DIV

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Battery Power (Nonvolatile Supply)

BROWNOUT

LCD

SLEEP

–

–

–

Yes

–

–

28.672 kHz

(7/8 of 32768 Hz)

–

Yes

Yes

Yes

Yes

Yes (8 kb/s)

Yes (16 kb/s)

300 bd

–

Yes

Yes

–

Yes

Yes

Yes

Yes

Yes

Yes

–

–

–

–

–

–

–

–

Yes

–

–

–

–

–

–

–

–

Yes

Yes

–

–

Yes

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

Yes

Yes

–

–

Yes

MPU_DIV

ICE

DIO Pins

Watchdog Timer

LCD

EEPROM Interface (2-wire)

EEPROM Interface (3-wire)

UART

Optical TX modulation

Flash Read

Flash Page Erase

Flash Write

RAM Read and Write

Wakeup Timer

OSC and RTC

XRAM data preservation

V3P3D voltage output pin

GPO – GP7

registers

-- indicates not active

2.3.1

BROWNOUT Mode

In BROWNOUT mode, most non-metering digital functions are active (as shown in Table 47), including

ICE, UART, EEPROM, LCD and RTC. In BROWNOUT mode, a low bias current regulator will provide

2.5 Volts to V2P5 and V2P5NV. The regulator has an output called BAT_OK to indicate that it has suffi-

cient overhead. When BAT_OK = 0, the part will enter SLEEP mode. From BROWNOUT mode, the pro-

cessor can voluntarily enter LCD or SLEEP modes. When system power is restored, the part will auto-

matically transition from any of the battery modes to MISSION mode, once the PLL has settled.

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