TIMER B
8.2 Block description
8.2.2 Count start register
This register is used to start and stop counting. One bit of this register corresponds to one timer. (This is
the one-to-one relationship.) Figure 8.2.2 shows the structure of the count start register 0.
b7 b6 b5 b4 b3 b2 b1 b0
Count start register 0 (Address 4016)
Bit
0
Bit name
Function
At reset R/W
0 : Stop counting
1 : Start counting
Timer A0 count start bit
Timer A1 count start bit
Timer A2 count start bit
Timer A3 count start bit
Timer A4 count start bit
Timer B0 count start bit
Timer B1 count start bit
Timer B2 count start bit
0
0
0
0
0
0
0
0
RW
RW
RW
RW
RW
RW
RW
RW
1
2
3
4
5
6
7
Fig. 8.2.2 Structure of count start register 0
8.2.3 Timer Bi mode register
Figure 8.2.3 shows the structure of the timer Bi mode register. The operating mode select bits are used
to select the operating mode of timer Bi. Bits 2 to 7 have different functions according to the operating
mode. These bits are described in the paragraph of each operating mode.
b7 b6 b5 b4 b3 b2 b1 b0
Timer Bi mode register (i = 0 to 2) (Addresses 5B16 to 5D16)
Function
Bit
0
Bit name
At reset R/W
b1 b0
0
RW
Operating mode select bits
0 0 : Timer mode
0 1 : Event counter mode
1 0 : Pulse period/Pulse width measurement mode
1 1 : Do not select.
0
1
RW
These bits have different functions according to the operating mode.
0
2
3
4
5
RW
RW
RW
0
0
RO
(Note)
Undefined
0
0
6
7
RW
RW
Note: Bit 5 is invalid in the timer and event counter modes; its value is undefined at reading.
Fig. 8.2.3 Structure of timer Bi mode register
7906 Group User’s Manual Rev.2.0
8-4
RENESAS [ RENESAS TECHNOLOGY CORP ]
