BC2102 Datasheet, PDF (9/15 Pages) Holtek Semiconductor Inc – Sub-1GHz OOK/FSK Transmitter

BC2102
Register Map
When connected to an external MCU, the device can be setup and operated using a series of internal registers.
Device commands and data are written to and read from the device using its internal I²C bus. This list provides a
summary of all internal registers. Their detailed operation is described under their relevant section in the functional
description.
Address
Register
Name
7
Bit
6
5
4
3
2
1
0
00h
CFG0
XO_SEL
XO_TRIM[5:0]
01h
CFG1
DLY_TOFF[3:0]
Setting1
02h
CFG2
FDEV[7:0]
03h
CFG3
FSK_SEL
Setting2
TXPWR[3:0]
04h
CFG4
D_N[5:0]
BAND_SEL[1:0]
05h
CFG5
D_K[11:4]
06h
CFG6
D_K[19:12]
07h
CFG7
EFPGM
Setting3
CFG0: Configuration Control Register 0
Address
Bit
7
6
5
4
3
2
1
0
Name
XO_SEL
XO_TRIM[5:0]
00h
R/W
R/W
R/W
R/W
Initial Value
1
0
1
0
0
0
0
0
Bit 7~6
Bit 5~0
XO_SEL: External Crystal Selection
00: Reserved
01: 24MHz X'tal
10: 16MHz X'tal
11: Reserved
XO_TRIM[5:0]: Trim value for the internal capacitor load for the crystal
XO_TRIM[5:0]
0
4
8
12
16
17
18
20
24
28
32
36
40
44
48
52
56
60
63
Equiv. C_L (pF)
11.676
11.822
11.927
13.247
13.962
14.137
14.295
14.639
15.301
15.955
16.651
17.288
17.962
18.610
19.294
19.870
20.472
21.003
21.411
Rev. 1.00
9
December 21, 2016