參數(shù)資料
型號: MB90F823PF
廠商: FUJITSU LTD
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP80
封裝: 0.80 MM, PLASTIC, QFP-80
文件頁數(shù): 37/98頁
文件大?。?/td> 1383K
代理商: MB90F823PF
MB90820 Series
42
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 (divided by 1/2 of oscillation clock).
Features of timebase timer :
Generates the interruption at counter-overflow
Supports for EI2OS
Interval timer function:
Generates an interrupt at four different time intervals
Clock supply function:
Four different clock can be selected as watchdog timer’s count clock
Supply clock for oscillation stabilization
(1) Register configuration
(2) Block diagram
15
14
13
12
11
10
9
8
R/W
1
Address: 0000A9H
R/W
0
R/W
0
W
1
R/W
0
R/W
0
Reserved
TBIE
TBOF
TBR
TBC1
TBC0
Timebase Timer Control Register
TBTC
Initial value
Read/write
Bit number
XX
OF: Overflow
HCLK: Oscillation clock
*1: Switching of the machine clock from the oscillation clock to the PLL clock
*2: Interrupt number
OF
Timebase
timer counter
Divided by
2 of HCLK
Power-on reset
Stop mode start
Counter
clear circuit
Interval
timer selector
To watchdog timer
To the oscillation
setting time selector
in the clock control
section
× 21 × 22 × 23 . . . . . . × 28 × 29 × 210 × 211 × 212 × 213 × 214 × 215 × 216 × 217 × 218
OF
Counter clear
TBR TBC1 TBC0
TBIE TBOF
CKSCR: MCS = 1, 0*1
Timebase timer
control register
(TBTC)
TBOF clear
TBOF set
Timebase timer
interrupt signal
#36 (24H)*2
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