UPD75518 NEC, UPD75518 Datasheet - Page 65

• Manufacturer Part Number: UPD75518
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

Address
F85H
BTM3
3
BTM2
2
BTM1
Fig. 4-21 Format of the Basic Interval Timer Mode Register
1
BTM0
0
(Frequency when f
(Frequency when f
Basic interval timer start control bit
When “1” is written to this bit, the basic interval timer operation starts (the counter
and the interrupt request flag are cleared).
When the operation starts, this bit is automatically reset to 0.
0
0
1
1
0
0
1
1
Symbol
BTM
Other
setting
Other
setting
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
1
Input clock specification
Input clock specification
X
X
= 6.0 MHz)
= 4.19 MHz)
Not to be set
Not to be set
(32.768 kHz)
(1.46 kHz)
(11.7 kHz)
(46.9 kHz)
(1.02 kHz)
(8.18 kHz)
(188 kHz)
(131 kHz)
f
f
f
f
f
f
f
f
X
X
X
X
X
X
X
X
/2
/2
/2
/2
/2
/2
/2
/2
12
12
9
7
5
9
7
5
(wait time for releasing standby)
(wait time for releasing standby)
Interrupt interval time
Interrupt interval time
PD75518(A)
(21.8 ms)
(5.46 ms)
(1.37 ms)
(31.3 ms)
(7.82 ms)
(1.95 ms)
(175 ms)
(250 ms)
2
2
2
2
2
2
2
2
20
17
15
13
20
17
15
13
–
–
/f
/f
/f
/f
/f
/f
/f
/f
X
X
X
X
X
X
X
X
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