参数资料
型号: S3C80B5XX-AM
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP24
封装: 0.300 INCH, SDIP-24
文件页数: 14/146页
文件大小: 740K
代理商: S3C80B5XX-AM
S3C80A4/C80A8/C80A5/C80B4/C80B8/C80B5
BASIC TIMER AND TIMER 0
10-1
10
BASIC TIMER and TIMER 0
MODULE OVERVIEW
The S3C80A4/C80A8/C80A5/C80B4/C80B8/C80B5 has two default timers: an 8-bit basic timer and one 8-bit
general-purpose timer/counter. The 8-bit timer/counter is called timer 0.
Basic Timer (BT)
You can use the basic timer (BT) in two different ways:
— As a watchdog timer to provide an automatic reset mechanism in the event of a system malfunction, or
— To signal the end of the required oscillation stabilization interval after a reset or a Stop mode release.
BASIC TIMER CONTROL REGISTER (BTCON)
The basic timer control register, BTCON, is used to select the input clock frequency, to clear the basic timer
counter and frequency dividers, and to enable or disable the watchdog timer function. It is located in set 1,
address D3H, and is read/write addressable using Register addressing mode.
A system reset clears BTCON. This enables the watchdog function and selects a basic timer clock frequency of
f
OSC/4096. To disable the watchdog function, you must write the signature code '1010B' to the basic timer
register control bits BTCON.7–BTCON.4. For more reliability, we recommend to use the Watch-dog timer
function in remote controller and hand-held product application.
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