Silicon Laboratories SI2493/57/34/15/04, SI2494/39 manual Pulse Dial Registers, Dtmf Dial Registers

AN93

Table 53. Pulse Dial Registers

Register	Name	Description	Default
U37	PD0	Number of pulses to dial 0.	0x000A
U38	PD1	Number of pulses to dial 1.	0x0001
U39	PD2	Number of pulses to dial 2.	0x0002
U3A	PD3	Number of pulses to dial 3.	0x0003
U3B	PD4	Number of pulses to dial 4.	0x0004
U3C	PD5	Number of pulses to dial 5.	0x0005
U3D	PD6	Number of pulses to dial 6.	0x0006
U3E	PD7	Number of pulses to dial 7.	0x0007
U3F	PD8	Number of pulses to dial 8.	0x0008
U40	PD9	Number of pulses to dial 9.	0x0009
U42	PDBT	Pulse dial break time (ms units).	0x003D
U43	PDMT	Pulse dial make time (ms units).	0x0027
U45	PDIT	Pulse dial interdigit time (ms units).	0x0320

5.7.7. U46–U48 (DTMF Dial Registers)

U46–U48 set the DTMF power level, DTMF “on” time, and DTMF “off” time, respectively (see Table 54). The DTMF power levels are set in register U46 as a 16-bit value with the format 0x0HL0, where H is a hexadecimal number (0–F) for the dBm level of the high-frequency DTMF tone, and L is a hexadecimal number (0–F) for the dBm level of the low-frequency DTMF tone. The power level is specified in –1 dB units. The DTMF output level is 0 dBm for each tone if U46 = 0x0000 and –15 dBm if U46 = 0x0FF0. The default power level is –9 dBm for the high tone and –11 dBm for the low tone.

U47 and U48 set the DTMF “on” time (DTNT) and “off” time (DTFT) respectively as hexadecimal values in milliseconds. The default value for both U47 and U48 is 100 ms, and the range of values is 0–1000 ms.

Table 54. DTMF Dial Registers

Register	Name		Description	Default
U46	DTPL	DTMF power level		0x09B0
U47	DTNT	DTMF “on” time (ms units).		0x0064
U48	DTFT	DTMF “off” time (ms units).		0x0064

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