GMS81508B HYNIX [Hynix Semiconductor], GMS81508B Datasheet - Page 59

• Manufacturer Part Number: GMS81508B
• Description: HYUNDAI MICRO ELECTRONICS 8-BIT SINGLE-CHIP MICROCONTROLLERS
• Manufacturer: HYNIX [Hynix Semiconductor]

GMS81508B/16B/24B
Note: BUR is undefined after reset, so it must be initialized
to between 1
Note that BUR is a write-only register.
56
BUR
[5:0]
0A
0B
0C
0D
0E
1A
1B
1C
1D
1E
00
01
02
03
04
05
06
07
08
09
0F
10
11
12
13
14
15
16
17
18
19
1F
H
250.000
125.000
and 3F
83.333
62.500
50.000
41.667
35.714
31.250
27.778
25.000
22.727
20.833
19.231
17.857
16.667
15.625
14.706
13.889
13.158
12.500
11.905
11.364
10.870
10.417
10.000
00
9.615
9.259
8.929
8.621
8.333
8.065
-
H
by software.
125.000
62.500
41.667
31.250
25.000
20.833
17.857
15.625
13.889
12.500
11.364
10.417
01
9.615
8.929
8.333
7.813
7.353
6.944
6.579
6.250
5.952
5.682
5.435
5.208
5.000
4.808
4.630
4.464
4.310
4.167
4.032
BUR[7:6]
-
62.500
31.250
20.833
15.625
12.500
10.417
10
8.929
7.813
6.944
6.250
5.682
5.208
4.808
4.464
4.167
3.906
3.676
3.472
3.289
3.125
2.976
2.841
2.717
2.604
2.500
2.404
2.315
2.232
2.155
2.083
2.016
-
Table 15-1 Buzzer Frequency
31.250
15.625
10.417
11
7.813
6.250
5.208
4.464
3.906
3.472
3.125
2.841
2.604
2.404
2.232
2.083
1.953
1.838
1.736
1.645
1.563
1.488
1.420
1.359
1.302
1.250
1.202
1.157
1.116
1.078
1.042
1.008
-
The 6-bit counter is cleared and starts the counting by writ-
ing signal at BUR register. It is incremental from 00
it matches 6-bit BUR value.
When main-frequency is 8MHz, buzzer frequency is
shown as below table.
BUR
[5:0]
2C
2D
3C
3D
2A
2B
2E
2F
3A
3B
3E
3F
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
00
7.813
7.576
7.353
7.143
6.944
6.757
6.579
6.410
6.250
6.098
5.952
5.814
5.682
5.556
5.435
5.319
5.208
5.102
5.000
4.902
4.808
4.717
4.630
4.545
4.464
4.386
4.310
4.237
4.167
4.098
4.032
3.968
HYUNDAI MicroElectronics
01
3.906
3.788
3.676
3.571
3.472
3.378
3.289
3.205
3.125
3.049
2.976
2.907
2.841
2.778
2.717
2.660
2.604
2.551
2.500
2.451
2.404
2.358
2.315
2.273
2.232
2.193
2.155
2.119
2.083
2.049
2.016
1.984
BUR[7:6]
DEC. 1999 Ver 1.04
10
1.953
1.894
1.838
1.786
1.736
1.689
1.645
1.603
1.563
1.524
1.488
1.453
1.420
1.389
1.359
1.330
1.302
1.276
1.250
1.225
1.202
1.179
1.157
1.136
1.116
1.096
1.078
1.059
1.042
1.025
1.008
0.992
11
H
0.977
0.947
0.919
0.893
0.868
0.845
0.822
0.801
0.781
0.762
0.744
0.727
0.710
0.694
0.679
0.665
0.651
0.638
0.625
0.613
0.601
0.590
0.579
0.568
0.558
0.548
0.539
0.530
0.521
0.512
0.504
0.496
until