BC2102 Datasheet, PDF (11/15 Pages) Holtek Semiconductor Inc – Sub-1GHz OOK/FSK Transmitter

BC2102
CFG4: Configuration Control Register 4
Address
Bit
7
6
5
4
3
2
1
0
Name
D_N[5:0]
BAND_SEL[1:0]
04h
R/W
R/W
R/W
Initial Value
0
1
0
1
1
0
0
1
Bit 7~2 D_N[5:0]: Integer of dividend for MMD
Bit 1~0 BAND_SEL[1:0]: Band Frequency Coarse Control
BAND_SEL
00
01
10
11
Frequency
315MHz
433MHz
868MHz
915MHz
Note that the BAND_SEL only select an approximate frequency range while the exact frequency value
is determined by the D_N and D_K bit fields.
CFG5: Configuration Control Register 5
Address
Bit
7
6
5
4
3
2
1
0
Name
D_K[11:4]
05h
R/W
R/W
Initial Value
0
1
1
1
0
0
0
0
CFG6: Configuration Control Register 6
Address
Bit
7
6
5
4
3
2
1
0
Name
D_K[19:12]
06h
R/W
R/W
Initial Value
0
0
1
1
1
1
0
1
D_K[19:4]: 16-bit Fractional of dividend for MMD
D_N&D_K example.
X’TAL=16MHz and TX band =433MHz
1. D_N → (433M×Divider)/16M=54.125
Take the integer part → D_N=54-32=22 → 010110
2. D_K → (433M×Divider)/16M=54.125
Take the fractional part → D_K=0.125×2²⁰=131072 → 0010-0000-0000-0000
3. 24MHz X’TAL calculation:
(433M×Divider)/(24M/2)=72.16666667
Take the integer part → D_N=72-32=40 → 101000
Take the fractional part → D_K=0.16666667×2²⁰=174762 → 0010-1010-1010-1010
4. The example frequency can be refered in the following table.
Band_SEL Frequency Divider
X’TAL
D_N[5:0]
D_K[19:4]
315MHz
315MHz
2
24MHz
16MHz
010100
000111
1000-0000-0000-0000
0110-0000-0000-0000
433MHz
433MHz
2
24MHz
16MHz
101000
010110
0010-1010-1010-1010
0010-0000-0000-0000
433MHz 433.92MHz
2
24MHz
16MHz
101000
010110
0101-0001-1110-1011
0011-1101-0111-0000
868MHz
868MHz
1
24MHz
16MHz
101000
010110
0101-0101-0101-0101
0100-0000-0000-0000
915MHz
915MHz
1
24MHz
16MHz
101100
011001
0100-0000-0000-0000
0011-0000-0000-0000
Rev. 1.00
11
December 21, 2016