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dsPIC
®
DSC DTMF Detection Library User’s Guide
DS70332A-page 16
©
2008 Microchip Technology Inc.
Table 2-5 lists the country specific register settings.
#define R17_LIM n
Current Limit
n = 0, All other Modes
n = 3, CTR_21 mode
#define R18_FJM n
Force Japan DC Termination Mode
n = 0, Normal Gain
n = 1, If FCC DC Termination mode is selected, setting this bit will
force the Japan DC Termination mode while allowing for a transmit
level of -1dBm.
#define R18_VOL n
Line Voltage Adjust
Used to adjust the tip and ring voltage. Lowering this voltage will
improve margin in low voltage countries. Rising this voltage may
improve distortion performance.
n = 0, Normal
n = 1, -0.125V
n = 2, 0.25V
n = 3, 0.125V
TABLE 2-4: DAA Si3034 CONFIGURATION (CONTINUED)
Option Description