參數(shù)資料
型號: MB90F488B
廠商: Fujitsu Limited
英文描述: 16-bit Proprietary Microcontroller
中文描述: 16位微控制器專有
文件頁數(shù): 67/120頁
文件大?。?/td> 1241K
代理商: MB90F488B
MB90480/485 Series
67
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
OF
OF
OF
OF
×
2
1
×
2
2
×
2
8
×
2
9
×
2
10
×
2
11
×
2
12
×
2
1
3
×
2
14
×
2
15
×
2
16
×
2
17
×
2
1
8
RE
S
V
TBIE TBOF TBR
TBC1 TBC0
Interv
a
l timer
s
elector
To PPG timer
Timebase
timer counter
HCLK
×
2
To watchdog
timer
Power-on reset
Stop mode start
Counter
clear
control
circuit
TBOF clear
Timebase timer control register (TBTC)
Timebase timer interrupt signal
To clock control
module oscillator
stabilization wait
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.
: Overflow
Hold status start
CKSCR : MCS
=
1
0*
1
CKSCR : SCS
=
0
1*
2
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