參數(shù)資料
型號: MB90487PFV
廠商: FUJITSU LTD
元件分類: 微控制器/微處理器
英文描述: 16-bit Proprietary Microcontroller CMOS
中文描述: 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP100
封裝: PLASTIC, LQFP-100
文件頁數(shù): 62/113頁
文件大?。?/td> 522K
代理商: MB90487PFV
MB90480/485 Series
62
15. Timebase Timer
The timebase timer is an 18-bit free run counter (timebase counter) that counts up in synchronization with the
internal count clock signal (base oscillator
×
2) , and functions as an interval timer with a choice of four types of
time intervals. Other functions provided by this module include timer output for the oscillator stabilization wait
period, and operating clock signal feed for other timer circuits such as the watchdog timer.
(1) Register List
(2) Block Diagram
Timebase timer control register (TBTC)
0000A9
H
Read/write
Initial value
X
X
R/W
0
R/W
0
W
1
R/W
0
R/W
0
15
14
13
12
11
10
9
8
R/W
1
RESV
TBIE
TBOF
TBR
TBC1
TBC0
TBIE TBOF TBR
RESV
TBC1 TBC0
OF
OF
OF
OF
×
2
1
×
2
2
×
2
8
×
2
9
×
2
10
×
2
11
×
2
12
×
2
13
×
2
14
×
2
15
×
2
16
×
2
17
×
2
18
to PPG timer
Timebase
timer counter
HCLK
×
2
To watchdog
timer
Power-on reset
Stop mode start
Counter
clear
control
circuit
Interval timer
selector
TBOF clear
Timebase timer control register (TBTC)
Timebase timer interrupt signal
Clock control module
Oscillator stabilization
wait
To time selector
TBOF
set
OF
HCLK : Oscillator clock
*1
: Switch machine clock from main clock or sub clock to PLL clock.
*2
: Switch machine clock from sub clock to main clock.
: Not used
: Overflow
Hold status start
CKSCR : MCS
=
1
0*
1
CKSCR : SCS
=
0
1*
2
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