参数资料
型号: M30201F4T-FP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP56
封装: PLASTIC, QFP-56
文件页数: 107/158页
文件大小: 1633K
代理商: M30201F4T-FP
52
Under
development
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer A
Item
Specification
Count source
f1, f8, f32, fc32
Count operation
Down count
When the timer underflows, it reloads the reload register contents before
continuing counting
Divide ratio
1/(n+1)
n : Set value
Count start condition
Count start flag is set (= 1)
Count stop condition
Count start flag is reset (= 0)
Interrupt request generation timing
When the timer underflows
TA0IN pin function
Programmable I/O port or gate input
TA0OUT pin function
Programmable I/O port or pulse output
Read from timer
Count value can be read out by reading timer A0 register
Write to timer
When counting stopped
When a value is written to timer A0 register, it is written to both reload register and counter
When counting in progress
When a value is written to timer A0 register, it is written to only reload register
(Transferred to counter at next reload time)
Select function
Gate function
Counting can be started and stopped by the TA0IN pin’s input signal
Pulse output function
Each time the timer underflows, the TA0OUT pin’s polarity is reversed
(1) Timer mode
In this mode, the timer counts an internally generated count source. (See Table 1.13.) Figure 1.41 shows
the timer A0 mode register in timer mode.
Table 1.13. Specifications of timer mode
Figure 1.41. Timer A0 mode register in timer mode
Note 1: Set the corresponding port direction register to “1” (output mode).
Note 2: The bit can be “0” or “1”.
Note 3: Set the corresponding port direction register to “0” (input mode).
Timer A0 mode register
Symbol
Address
When reset
TA0MR
039616
0016
Bit name
Function
Bit symbol
W
R
b7
b6
b5
b4
b3
b2 b1
b0
Operation mode
select bit
0 0 : Timer mode
b1 b0
TMOD1
TMOD0
MR0
Pulse output function
select bit
0 : Pulse is not output
(TA0OUT pin is a normal port pin)
1 : Pulse is output (Note 1)
(TA0OUT pin is a pulse output pin)
Gate function select bit
0 X (Note 2): Gate function not available
(TA0IN pin is a normal port pin)
1 0 : Timer counts only when TA0IN pin
is held “L” (Note 3)
1 1 : Timer counts only when TA0IN pin
is held “H” (Note 3)
b4 b3
MR2
MR1
MR3
0 (Must always be fixed to “0” in timer mode)
0 0 : f1
0 1 : f8
1 0 : f32
1 1 : fC32
b7 b6
TCK1
TCK0
Count source select bit
00
0
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