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

 

 

 

 

 

102

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Silicon Laboratories SI2493/57/34/15/04, SI2494/39 manual Pulse Dial Registers, 7. U46-U48 Dtmf Dial Registers