参数资料
型号: MB90F523PFF
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP120
封装: PLASTIC, LQFP-120
文件页数: 39/106页
文件大小: 1541K
代理商: MB90F523PFF
MB90520 Series
38
2. Timebase Timer
The timebase timer is a 18-bit free-run counter (timebase counter) for counting up in synchronization to the
internal count clock (divided-by-2 of oscillation) with an interval timer function for selecting an interval time from
four types : 212/HCLK, 214/HCLK, 216/HCLK, and 219/HCLK.
The timebase timer also has a function for supplying operating clocks for the timer output for the oscillation
stabilization time or the watchdog timer, etc.
(1) Register Configuration
(2) Block Diagram
Timebase timer control register (TBTC)
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
R/W
R/W
Address
0000A9H
TBIE
TBOF TBR
TBC1 TBC0
1XX00000 B
Initial value
R/W: Readable and writable
— : Undefined bits (read value undefined)
Reserved
. . .
To 8/16-bit PPG timer
Timebase timer counter
Divided-by-2
of HCLK
Power-on reset
Start stop-mode
CKSCR : MCS = 1
→0*1
Counter
clear circuit
Interval
timer selector
Clear TBOF
Set TBOF
Timebase timer control register
(TBTC)
Timebase timer
interrupt signal
#12*2
OF : Overflow
HCLK : Oscillation clock frequency
Switch machine clock from oscillation clock to PLL clock
Interrupt number
*1:
*2:
Reserved
——
TBIE
TBR
TBOF
TBC1 TBC0
To oscillation stabilization
time selector of clock control block
To watchdog timer
OF
× 21 × 22 × 23
× 28 × 29 × 210 × 211 × 212 × 213 × 214 × 215 × 216 × 217 × 218
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