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参数资料
型号： M30600M8-XXXGP
元件分类： 微控制器/微处理器
英文描述： 16-BIT, MROM, MICROCONTROLLER, PQFP100
封装： 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100
文件页数： 92/139页
文件大小： 1782K
代理商： M30600M8-XXXGP
Mitsubishi microcomputers
M16C / 60 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer A
56
Timer A
Figure 1.38 shows a block diagram of timer A. Figures 1.39 to 1.41 show configuration of 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)'s 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.
Counter (16)
Count start flag
(Address 038016)
Up count/down count
TAi
Addresses
TAj
TAk
Timer A0 0387 16
0386 16
Timer A4 Timer A1
Timer A1 0389 16
0388 16
Timer A0 Timer A2
Timer A2 038B 16 038A 16
Timer A1 Timer A3
Timer A3 038D 16 038C 16
Timer A2 Timer A4
Timer A4 038F 16
038E 16
Timer A3 Timer A0
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
Figure 1.38. Block diagram of timer A
Figure 1.39. Configuration of timer A-related registers (1)
Timer Ai mode register
Symbol
Address
When reset
TAiMR(i=0 to 4)
0396 16 to 039A16
00 16
Bit name
Function
Bit
symbol
W
R
b7 b6 b5 b4 b3 b2 b1 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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