Samsung S3C84E5 user manual Reset, WTCON.7, WTCON.6, WTCON.1, WTCON.0

WATCH TIMERS3C84E5/C84E9/P84E9

WATCH TIMER CONTROL REGISTER (WTCON: R/W)

FAH

WTCON.7

WTCON.6

WTCON.5

WTCON.4

WTCON.3

WTCON.2

WTCON.1

WTCON.0

RESET

"0"

"0"

"0"

"0"

"0"

"0"

"0"

"0"

Table 14-1. Watch Timer Control Register (WTCON): Set 1, Bank 0, FAH, R/W

Bit Name

Values

Function

Address

WTCON.7

0

Select (fx/256) as the watch timer clock (fx: Main clock)

FAH

1

Select subsystem clock as watch timer clock

WTCON.6

0

Disable watch timer interrupt

1

Enable watch timer interrupt

WTCON.5–.4

0

0

0.5 kHz buzzer (BZOUT) signal output

0

1

1 kHz buzzer (BZOUT) signal output

1

0

2 kHz buzzer (BZOUT) signal output

1

1

4 kHz buzzer (BZOUT) signal output

WTCON.3–.2

0

0

Set watch timer interrupt to 0.5 s.

0

1

Set watch timer interrupt to 0.25 s.

1

0

Set watch timer interrupt to 0.125 s.

1

1

Set watch timer interrupt to 1.955 ms.

WTCON.1

0

Disable watch timer, clear frequency dividing circuits

1

Enable watch timer

WTCON.0

0

Interrupt is not pending, clear pending bit when write

1

Interrupt is pending

NOTE:

Main system clock frequency (fx) is assumed to be 9.8304 MHz

14-2