HMS91C8032 datasheet(40/157 Pages) HYNIX

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HMS91C8032/97C8032

NOV., 2001 Ver 1.02

WDTCON: BEEPER & WATCHDOG TIMER CONTROL REGISTER. BIT ADDRESSABLE. : F8H

RUNBEEP

WDTCON.7

Software START/STOP control for Beeper. A logic 1 starts the Beeper.

BEEPMD1

WDTCON.6

See Table 4-20

BEEPMD0

WDTCON.5

See Table 4-20

RUNWDT

WDTCON.4

Restart Watchdog timer (This bit is automatically cleared to “0” after restart.).

WDTMK

WDTCON.3

Software Enable/Disable NMI(Non Maskable Interrupt) for WDT. A logic 1 makes WDT interrupt NMI

WDTMD2

WDTCON.2

See Table 4-21

WDTMD1

WDTCON.1

See Table 4-21

WDTMD0

WDTCON.0

See Table 4-21

SCMOD : SYSTEM CLOCK & POWER CONTROL REGISTER. BIT ADDRESSABLE. : 80H

SCMOD.7

Reserved for future use *

SCMOD.6

Reserved for future use *

SCMOD.5

Reserved for future use *

SCSTOP

SCMOD.4

Software control of the main system oscillator. A logic 1 pulls down the main system oscillator

(7.2MHz).

SCSW

SCMOD.3

Software switch control between main system oscillator and sub system oscillator. A logic 1 switches

sub system oscillator (32.768KHz).

SCMOD2

SCMOD.2

See Table 4-22

SCMOD1

SCMOD.1

See Table 4-22

SCMOD0

SCMOD.0

See Table 4-22

RUNBEEP

BEEPMD1

BEEPMD0

RUNWDT

WDTMK

WDTMD2

WDTMD1

WDTMD0

BEEPMD1

BEEPMD0

Select Beeper Clock Frequency (fOSC = 7.2 MHz)

1.2KHz (fOSC / 6000)

2.4KHz (fOSC / 3000)

4.5KHz (fOSC / 1600)

8KHz (fOSC / 900)

Table 4-20 BEEP Mode

WDTMD2

WDTMD1

WDTMD0

Selects of WDT input (fOSC = 7.2 MHz)

fxx (fXX = fOSC/2)

fxx / 2^3

fxx / 2^4

fxx / 2^5

fxx / 2^7

fxx / 2^9

fxx / 2^11

fxx / 2^13

Table 4-21 Watchdog Timer

SCSTOP

SCSW

SCMOD2

SCMOD1

SCMOD0

HMS91C8032 Datasheet(PDF) 40 Page - Hynix Semiconductor

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