參數(shù)資料
型號(hào)： M306H7MG-XXXFP
元件分類(lèi)： 微控制器/微處理器
英文描述： 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁(yè)數(shù)： 89/115頁(yè)
文件大小： 3146K
代理商： M306H7MG-XXXFP
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Rev.2.10
Oct 25, 2006
Page 75 of 326
REJ03B0152-0210
M306H7MG-XXXFP/MC-XXXFP/FGFP
9.TIMERS
Figure 9.5
TA0 to TA4 Registers, TABSR Register, and UDF Register
Symbol
Address
After reset
TA0
038716, 038616
Indeterminate
TA1
038916, 038816
Indeterminate
TA2
038B16, 038A16
Indeterminate
TA3
038D16, 038C16
Indeterminate
TA4
038F16, 038E16
Indeterminate
b7
b0 b7
b0
(b15)
(b8)
Timer Ai register (i= 0 to 4) (Note 1)
RW
Divide the count source by n + 1 where n =
set value
Function
Setting range
Divide the count source by FFFF16 – n + 1
where n = set value when counting up or
by n + 1 when counting down
Divide the count source by n where n = set
value and cause the timer to stop
Modify the pulse width as follows:
PWM period: (216 – 1) / fj
High level PWM pulse width: n / fj
where n = set value, fj = count source
frequency
000016 to FFFE16
(Note 3, 4)
Note 1: The register must be accessed in 16 bit units.
Note 2: If the TAi register is set to ‘000016,’ the counter does not work and timer Ai interrupt
requests are not generated either. Furthermore, if “pulse output” is selected, no pulses are
output from the TAiOUT pin.
Note 3: If the TAi register is set to ‘000016,’ the pulse width modulator does not work, the output
level on the TAiOUT pin remains low, and timer Ai interrupt requests are not generated
either. The same applies when the 8 high-order bits of the timer TAi register are set to ‘001
6’ while operating as an 8-bit pulse width modulator.
Note 4: Use the MOV instruction to write to the TAi register.
Note 5: The timer counts pulses from an external device or overflows or underflows in other timers.
0016 to FE16
(High-order address)
0016 to FF16
(Low-order address)
Timer A4 up/down flag
Timer A3 up/down flag
Timer A2 up/down flag
Timer A1 up/down flag
Timer A0 up/down flag
Timer A2 two-phase pulse
signal processing select bit
Timer A3 two-phase pulse
signal processing select bit
Timer A4 two-phase pulse
signal processing select bit
Symbol
Address
After reset
UDF
038416
0016
TA4P
TA3P
TA2P
Up/down flag (Note 1)
Bit name
Function
Bit symbol
b7
b6
b5
b4
b3
b2
b1
b0
TA4UD
TA3UD
TA2UD
TA1UD
TA0UD
0 : Down count
1 : Up count
Enabled by setting the TAiMR
register’s MR2 bit to “0”
(= switching source in UDF
register) during event counter
mode.
0 : two-phase pulse signal
processing disabled
1 : two-phase pulse signal
processing enabled
Symbol
Address
After reset
TABSR
038016
0016
Count start flag
Bit name
Function
Bit symbol
RW
b7
b6
b5
b4
b3
b2
b1
b0
Timer B2 count start flag
Timer B1 count start flag
Timer B0 count start flag
Timer A4 count start flag
Timer A3 count start flag
Timer A2 count start flag
Timer A1 count start flag
Timer A0 count start flag
0 : Stops counting
1 : Starts counting
TB2S
TB1S
TB0S
TA4S
TA3S
TA2S
TA1S
TA0S
Note 1: Use MOV instruction to write to this register.
Note 2: Make sure the port direction bits for the TA2IN to TA4IN and TA2OUT to TA4OUT pins are set
to “0” (input mode).
Note 3: When not using the two-phase pulse signal processing function, set the bit corresponding to
timer A2 to timer A4 to “0”
.
RW
WO
RW
WO
Timer
mode
Event
counter
mode
One-shot
timer mode
Pulse width
modulation
mode
(16-bit PWM)
Pulse width
modulation
mode
(8-bit PWM)
000016 to FFFF16
(Notes 2, 4)
Mode
Modify the pulse width as follows:
PWM period: (28 – 1) x (m + 1)/ fj
High level PWM pulse width: (m + 1)n / fj
where n = high-order address set value,
m = low-order address set value, fj =
count source frequency
(Note 3, 4)
(Notes 2, 3)
(Note 5)
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