Samsung S3C9228/P9228, 8-Bit CMOS Microcontroller user manual Wtcon Watch Timer Control Register

CONTROL REGISTERSS3C9228/P9228

WTCON — Watch Timer Control Register DAH

Bit Identifier

RESET Value

Read/Write

.7

.7	.6	.5	.4	.3	.2	.1	.0
0	0	0	0	0	0	0	–
R/W	R/W	R/W	R/W	R/W	R/W	R/W	–

Watch Timer Clock Selection Bit

0Select main clock divided by 27 (fx/128)

1Select sub clock (fxt)

.6 Watch Timer Interrupt Enable Bit

0Disable watch timer interrupt

1Enable watch timer interrupt

.5-.4	Buzzer Signal Selection Bits
	0	0	0.5 kHz
	0	1	1 kHz
	1	0	2 kHz
	1	1	4 kHz

.3-.2	Watch Timer Speed Selection Bits
	0	0	Set watch timer interrupt to 1s
	0	1	Set watch timer interrupt to 0.5s
	1	0	Set watch timer interrupt to 0.25s
	1	1	Set watch timer interrupt to 3.91ms

.1	Watch Timer Enable Bit
	0	Disable watch timer; Clear frequency dividing circuits
	1	Enable watch timer

.0

Not used for S3C9228/P9228

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