參數(shù)資料
型號: MB90F474LPF
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 12 MHz, MICROCONTROLLER, PQFP100
封裝: PLASTIC, QFP-100
文件頁數(shù): 82/118頁
文件大?。?/td> 1199K
代理商: MB90F474LPF
MB90470 Series
66
15. Time Base Timer
The time base timer is an 18-bit free-run timer that counts up in synchronization with the internal count clock
(base oscillator divided by 2) . It functions as an interval timer with a selection of four types of time intervals.
Other functions of this timer also include output of a timer signal for the oscillator stabilization wait time and an
operating clock signal for the watchdog timer.
(1) Register List
(2) Block Diagram
Time base timer control register (TBTC)
0000A9H
(
)
( 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
× 21 × 22
× 28 × 29 × 210 × 211 × 212 × 213 × 214 × 215 × 216 × 217 × 218
To PPG timer
To watchdog timer
Time base timer/
counter
HCLK signal /2
Power-on reset
Stop mode start
Mode start
Hold status start
CKSCR : MCR
= 1 → 0*1
CKSCR : SCS
= 0 → 1*2
Clock control unit
Oscillator stabilization wait
To interval selector
Counter
clear
control
circuit
Interval timer selector
TBOF
set
TBOF clear
Time base timer control register (TBTC)
Time base timer interrupt signal
: Not used
OF
: Overflow
HCLK : Oscillator clock
*1
: Switches machine clock from main clock or sub-clock to PLL clock.
*2
: Switches machine clock from sub-clock to main clock.
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