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Timer mode
(b15)
b7
b7
b6
b5
b4
b3
b2
(b8)
b0 b7
b1
b0
Timer Bi mode register (i = 0 to 2) (Addresses 5B
0 0
Bit name
Bit
Operating mode select bits
0
1
2
These bits are ignored in timer mode.
3
Nothing is assigned.
4
This bit is ignored in timer mode.
5
Count source select bits
6
7
: It may be either "0" or "1."
7751 Group User's Manual
Appendix 3. Control registers
b0
Timer B0 register (Addresses 51
Timer B1 register (Addresses 53
Timer B2 register (Addresses 55
Bit
Functions
15 to 0
These bits can be set to "0000
Assuming that the set value = n, the counter
divides the count source frequency by n + 1.
When reading, the register indicates the
counter value.
16
b1 b0
0 0 : Timer mode
b7 b6
0 0 : f
/f
2
4
0 1 : f
/f
16
32
1 0 : f
/f
64
128
1 1 : f
/f
512
1024
APPENDIX
, 50
)
16
16
, 52
)
16
16
, 54
)
16
16
At reset
" to "FFFF
."
Undefined
16
16
to 5D
)
16
Functions
At reset
0
0
0
0
Undefined
Undefined
0
0
RW
RW
RW
RW
RW
RW
RW
–
–
RW
RW
20–25
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