bc41b143a07 ETC-unknow, bc41b143a07 Datasheet - Page 54

• Manufacturer Part Number: bc41b143a07
• Description: Single Chip Bluetooth
• Manufacturer: ETC-unknow

9.2.5
BlueCore4-ROM should be configured to operate with the chosen reference frequency. This is accomplished by
setting PSKEY_ANA_FREQ (0x1fe) for all frequencies with an integer multiple of 250kHz. The input frequency
default setting in BlueCore4-ROM is 26MHz.
The following CDMA/3G TCXO frequencies are also catered for: 7.68, 14.4, 15.36, 16.2, 16.8, 19.2, 19.44, 19.68, 19.8
and 38.4MHz.
9.3
This section describes the crystal mode. See section 9.2 for the description of the external reference clock mode.
9.3.1
BlueCore4-ROM contains a crystal driver circuit. This operates with an external crystal and capacitors to form a Pierce
oscillator.
CS-101564-DSP12
Reference Crystal Frequency (MHz)
Input Frequencies and PS Key Settings
Crystal Oscillator (XTAL_IN, XTAL_OUT)
XTAL Mode
+26.00 Default
n x 250kHz
Table 9.3: PS Key Values for CDMA/3G Phone TCXO Frequencies
14.40
15.36
16.20
16.80
19.20
19.44
19.68
19.80
38.40
7.68
Production Information
© CSR plc 2003-2007
PSKEY_ANA_FREQ (0x1fe)
(Units of 1kHz)
14400
15360
16200
16800
19200
19440
19680
19800
38400
26000
7680
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Device Terminal Descriptions
Page 54 of 97