參數(shù)資料
型號： M30100
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述： 單片16位CMOS微機(jī)
文件頁數(shù)： 95/164頁
文件大?。?/td> 3302K
代理商： M30100
deveopment
Tentative Specifications REV.E1
Timer C
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30100/M30102 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
94
Figure 1.14.31. Block diagram of Timer C
Timer C
Timer C is a 16-bit free-running timer. Figure 1.14.31 shows the block diagram of Timer C. The Timer C
uses an edge input to TC
IN
pin or the output of 512 f
RING
divisions as trigger to latch the timer count value
and generates an interrupt request. The TC
IN
input has a digital filter and this prevents an error caused by
noise or so on from occurring. Table 1.14.14 shows Timer C specifications. Figure 1.14.32 shows Timer
C-related registers. Figure 1.14.33 shows an operation example of Timer C and timer measurement
register.
Item
Specification
Count source
Count operation
f
1
, f
8
, f
32
Up count
Transfer counter value to time measurement register at active edge of
measurement pulse
Do not reset counter value even if active edge is detected
Time measurement control bit is set (=1)
Time measurement control bit is reset (=0)
Interrupt request generation timing
When active edge of measurement pulse is input [TCIN interrupt]
When the time underflows [Timer C interrupt]
TCIN pin function
Measurement pulse input
Count value reset timing
When time measurement control bit is reset (=0)
Read from timer (Note)
Count value can be read out by reading Timer C. (Note)
Count value at measurement pulse active edge input can be read out by reading time
measurement register.
Write to timer
Cannot write to Timer C and time measurement register
Select function
Measurement pulse active edge: selectable (rising edge/falling edge/both edges)
Measurement pulse: selectable (input from TC
IN
pin/512 divisions of f
RING
)
Digital filter sampling frequency: selectable (f
1
/f
8
/f
32
)
Note: The Timer C and the timer measurement register must be read in word-size.
Count start condition
Counter stop condition
Time measurement register (16)
Upper 8 bits
Lower 8 bits
Timer C counter (16)
Address 0091
16
f
1
f
8
f
32
Edge detection
TCIN
1/256
1/2
Ring oscillation
TCIN interrupt
Timer C overflow interrupt
Time measurement
input source
switching bit
"0"
"1"
Timer C clock
select bit
Reload signal
Digital
filter
f
1
f
8
f
32
Digital filter clock
select bit
Address 009D
16
Address 009C
16
Address 0090
16
Data bus
Upper 8 bits
Lower 8 bits
Table 1.14.14. Specifications of Timer C
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