參數資料
型號: MB90F377
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: 54/140頁
文件大小: 650K
代理商: MB90F377
MB90370/375 Series
54
3.
Timebase timer
The timebase timer is an 18-bit free-running counter (timebase counter) that counts up in synchronization with
the internal count clock (one-half of the source oscillation) .
Features of timebase timer :
Interrupt generated when counter overflow
EI
2
OS supported
Interval timer function :
An interrupt generated at four different time intervals
Clock supply function :
Four different clocks can be selected as watchdog timer’s count clock.
Supply clock for oscillation stabilization
(1) Register configuration
(2) Block diagram of timebase timer
Timebase Timer Control Register
Bit number
TBTC
Address :0000A9
H
Read/write
Initial value
R/W
0
R/W
0
R/W
1
R/W
0
R/W
0
15
14
13
12
11
10
9
8
R/W
1
Reserved
TBIE
TBOF
TBR
TBC1
TBC0
: Unused
OF : Overflow
HCLK : Oscillation clock
*1 : Switching of the machine clock from the oscillation clock to the PLL clock
*2 : Switching from main clock to sub-clock
TBIE
RESV
TBOF TBR
TBC1 TBC0
×
2
1
×
2
2
×
2
3
×
2
8
×
2
7
×
2
9
×
2
10
×
2
11
×
2
12
×
2
13
×
2
14
×
2
15
×
2
16
×
2
17
×
2
18
OF
OF
OF
OF
To watchdog timer
To the oscillation
stabilization wait
time selector in the
clock control
section
TBOF set
Timebase timer interrupt register (TBTC)
Timebase timer
interrupt signal
#12 (0C
H
)
Power-on reset
Stop mode start
CKSCR : MCS = 1
0 (*1)
SCS = 1
0 (*2)
Counter
clear circuit
Interval
timer selector
Timebase
timer counter
Divide-by
-two HCLK
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