m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 193

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

PULSE OUTPUT PORT MODE
9.2 Block description of pulse output port 0
Fig. 9.2.5 Structure of timer A0 and A3 mode registers (pulse output port 0)
9-12
9.2.4 Timers A0 to A4
Timers A0 and A3 are used as control registers; each generates a pulse output trigger. When using timers
A0 and A3, be sure to use them in the timer mode. (Refer to section “7.3 Timer mode.”)
When performing the pulse width modulation, be sure to use timers A1, A2, A4 in the pulse width modulation
mode. (Refer to section “7.6 Pulse width modulation (PWM) mode.”) Note that, from pin P2
PWM pulse by timer A4 is output. When it is unnecessary to output a PWM pulse, be sure to clear bit 2
of the timer A4 mode register (address 5A
I/O port pin.
Figure 9.2.5 shows the structure of the timer A0 and A3 mode registers (pulse output port 0); Figure 9.2.6
shows the structures of the timer A1, A2, A4 mode registers (pulse output port 0 with pulse width modulation
used).
Timer A0 mode register (Address 56
Timer A3 mode register (Address 59
Bit
0
1
2
3
4
5
6
7
Fix these bits to “000000
Count source select bits
Bit name
2
” in the pulse output port mode.
7905 Group User’s Manual Rev.1.0
16
16
)
)
See Table 7.2.3.
16
) to “0.” At this time, pin P2
Functions
0
can be used as a programmable
b7 b6 b5 b4 b3 b2 b1 b0
0 0
At reset
0
0
0
0
0
0
0
0
0
0
R/W
RW
RW
RW
RW
RW
RW
RW
RW
0
0
/TA4
0
OUT
, a