參數(shù)資料
型號(hào)： M30218MFCFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, QFP-100
文件頁數(shù)： 131/161頁
文件大小： 2043K
代理商： M30218MFCFP
71
Under
development
Tentative Specifications REV.A
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
TimerA
Timer A
Figure FB-2 shows the block diagram of timer A. Figures FB-3 to FB-5 show the timer A-related registers.
Except in event counter mode, timers A0 through A4 all have the same function. Use the timer Ai mode
register (i = 0 to 4) bits 0 and 1 to choose the desired mode.
Timer A has the four operation modes listed as follows:
Timer mode: The timer counts an internal count source.
Event counter mode: The timer counts pulses from an external source or a timer's over flow.
One-shot timer mode: The timer stops counting when the count reaches “000016”.
Pulse width modulation (PWM) mode: The timer outputs pulses of a given width.
Figure FB-2. Block diagram of timer A
Figure FB-3. Timer A-related registers (1)
Counter (16)
Count start flag
(Address 038016)
Up count/down count
TAiAddressesTAjTAkTAiOUT
Timer A0038716 038616
Timer A4Timer A1Timer A3
Timer A1038916 038816
Timer A0Timer A2Timer A4
Timer A2038B16 038A16
Timer A1Timer A3Timer A0
Timer A3038D16 038C16
Timer A2Timer A4Timer A1
Timer A4 038F16 038E16
Timer A3Timer A0Timer A2
Always down count except
in event counter mode
Reload register (16)
Low-order
8 bits
High-order
8 bits
Clock source
selection
Timer
(gate function)
Timer
One shot
PWM
f1
f8
f32
External
trigger
TAiIN
(i = 0 to 4)
TB2 overflow
Event counter
fC32
Clock selection
TAj overflow
(j = i - 1. Note, however, that j = 4 when i = 0)
Pulse output
Toggle flip-flop
TAiOUT
(i = 0 to 4)
Data bus low-order bits
Data bus high-order bits
Up/down flag
Down count
(Address 038416)
TAk overflow
(k = i + 1. Note, however, that k = 0 when i = 4)
Polarity
selection
Timer Ai mode register
Symbol
Address
When reset
TAiMR(i=0 to 4)
039616 to 039A16
0016
Bit name
Function
Bit symbol
W
R
b7
b6
b5
b4
b3 b2
b
1
b0
0 0 : Timer mode
0 1 : Event counter mode
1 0 : One-shot timer mode
1 1 : Pulse width modulation
(PWM) mode
b1 b0
TCK1
MR3
MR2
MR1
TMOD1
MR0
TMOD0
TCK0
Function varies with each operation mode
Count source select bit
(Function varies with each operation mode)
Operation mode select
bit
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