MSC1210 datasheet(26/83 Pages) TI

26 / 83 page

MSC1210

SBAS203F − MARCH 2002 − REVISED NOVEMBER 2004

www.ti.com

BROWNOUT RESET

The brownout reset (BOR) is enabled through Hardware

Configuration Register 1 (HCR1). If the conditions for

proper POR are not met or the device encounters a

brownout condition that does not generate a POR, the

BOR can be used to ensure proper device operation. The

BOR will hold the state of the device when the power

supply drops below the threshold level programmed in

HCR1, and then generate a reset when the supply rises

above the threshold level. Note that as the device is

released from reset, and program execution begins, the

device current consumption may increase, which may

result in a power-supply voltage drop, which may initiate

another brownout condition.

The BOR level should be chosen to match closely with the

application. For example, with a high external clock

frequency, the BOR level should match the minimum

operating voltage range for the device, or improper

operation may still occur.

Note that AVDD must rise above 2.0V for the Analog

Brownout Reset function to be disabled; otherwise, it will

be enabled and hold the device in reset.

POWER-DOWN MODES

The MSC1210 can power several of the on-chip

peripherals and put the CPU into IDLE. This is

accomplished by shutting off the clocks to those sections,

as shown in Figure 17. For lowest power, be sure that the

FRCM bit in FMCON is set.

USEC

MSECH

HMSEC

MSINT

ACLK

divide

by 64

MSECL

µs

100ms

Flash Write

Timing

Flash Erase

Timing

WDTCON

SECINT

FTCON

[3:0]

FTCON

[7:4]

seconds

interrupt

watchdog

milliseconds

interrupt

ADC Output Rate

ADCON3

ADCON2

Decimation Ratio

SYS Clock

Oscillator

PWMHI

PWMLOW

PWM Clock

SPICON

SCK

CLK

(30

µsto 40µs)

(5ms to 11ms)

STOP

PDCON.0

PDCON.4

PDCON.1

PDCON.2

PDCON.3

IDLE

CPU Clock

Timers 0/1/2

ADC Power Down

USART0/1

ADCON0

SAMP

MOD

(see Figure 13)

Figure 17. MSC1210 Timing Chain and Clock Control

MSC1210 Datasheet(PDF) 26 Page - Texas Instruments

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