TIMER 1 S3C9228/P9228
11-4
TWO 8-BIT TIMERS MODE (TIMER A and B)OVERVIEW
The 8-bit timer A and B are the 8-bit general-purpose timers. Timer A and B have the interval timer mode by
using the appropriate TACON and TBCON setting, respectively.
Timer A and B have the following functional components:
—Clock frequency divider with multiplexer
– fxx divided by 512, 256, 64, 8 or 1, fxt, and T1CLK (External clock) for timer A
– fxx divided by 512, 256, 64, 8 or 1, and fxt for timer B
—8-bit counter (TACNT, TBCNT), 8-bit comparator, and 8-bit reference data register (TADATA, TBDATA)
—Timer A have I/O pin for match output (TAOUT)
—Timer A match interrupt generation
—Timer A control register, TACON (page 0, BBH, read/write)
—Timer B match interrupt generation
—Timer B control register, TBCON (page 0, BAH, read/write)
Timer A and B Control Register (TACON, TBCON)
You use the timer A and B control register, TACON and TBCON, to
—Enable the timer A (interval timer mode) and B operating (interval timer mode)
—Select the timer A and B input clock frequency
—Clear the timer A and B counter, TACNT and TBCNT
—Enable the timer A and B interrupt