m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 142

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

Fig. 7.6.1 Structures of timer Ai register in PWM mode
f
Note: Use the MOVM or STA(STAD) instruction for writing to this register.
<When operating as a 16-bit pulse width modulator>
Timer A0 register (Addresses 47
Timer A1 register (Addresses 49
Timer A2 register (Addresses 4B
Timer A3 register (Addresses 4D
Timer A4 register (Addresses 4F
i
Timer A0 register (Addresses 47
Timer A1 register (Addresses 49
Timer A2 register (Addresses 4B
Timer A3 register (Addresses 4D
Timer A4 register (Addresses 4F
f
Note: Use the MOVM or STA(STAD) instruction for writing to this register.
15 to 0 Any value in the range from “0000
: Frequency of count source
<When operating as an 8-bit pulse width modulator>
i
: Frequency of count source
15 to 8
7 to 0
Bit
Bit
Writing to this register must be performed in a unit of 16 bits.
Writing to this register must be performed in a unit of 16 bits.
Assuming that the set value = n, the “H” level width of the PWM pulse which is output
from the TAi
(PWM pulse period =
Any value in the range from “00
Assuming that the set value = m, the period of the PWM pulse which is output from the
TAi
Any value in the range from “00
Assuming that the set value = n, the “H” level width of the PWM pulse which is output
from the TAi
OUT
pin is expressed as follows:
OUT
OUT
pin is expressed as follows :
pin is expressed as follows: n(m + 1)
2
16
f
–1
i
16
16
16
16
16
16
16
16
16
16
, 46
, 48
, 4E
, 4A
, 4C
, 46
, 48
)
, 4E
, 4A
, 4C
7905 Group User’s Manual Rev.1.0
16
16
16
16
16
16
16
16
16
16
16
16
” to “FF
)
)
” to “FF
16
)
)
)
)
)
)
)
)
” to “FFFE
(m + 1) (2
Function
Function
16
16
” can be set.
” can be set.
Timer A5 register (Addresses C7
Timer A6 register (Addresses C9
Timer A7 register (Addresses CB
Timer A8 register (Addresses CD
Timer A9 register (Addresses CF
Timer A5 register (Addresses C7
Timer A6 register (Addresses C9
Timer A7 register (Addresses CB
Timer A8 register (Addresses CD
Timer A9 register (Addresses CF
f
i
16
(b15)
(b15)
” can be set.
b7
n
8
f
b7
7.6 Pulse width modulation (PWM) mode
i
– 1)
f
i
(b8)
b0
(b8)
b0
b7
b7
16
16
16
16
16
16
16
16
16
16
, C6
, C8
, CE
, CA
, CC
, C6
, C8
, CE
, CA
, CC
16
16
16
16
16
16
Undefined
16
At reset
16
16
16
Undefined
Undefined
At reset
)
)
)
)
)
)
)
)
)
)
TIMER A
R/W
WO
R/W
WO
WO
b0
b0
7-39