Samsung S3C9228/P9228, 8-Bit CMOS Microcontroller user manual TWO 8-BIT Timers Mode Timer a and B

TIMER 1 S3C9228/P9228

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

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