Specifications

Si2404

40 Rev. 0.91

U4F FHT Flash Hook Time. Time corresponding with “!” or “&” dial modifier that the

Si2404 goes on-hook during a flash hook (ms units).

0x01F4

U50 LCDN Loop current debounce on time (ms units). 0x015E

U51 LCDF Loop current debounce off time (ms units). 0x00C8

U52 XMTL Transmit level (1 dB units)—Sets the modem data pump transmitter level.

Default level of 0 corresponds to –9.85 dBm.

Transmit level = –(9.85 + XMTL) dBm. Range = –9.85 to –48.

0x0000

U53 MOD2 This is a bit-mapped register. 0x0000

U62 DAAC1 This is a bit-mapped register. 0x0804

U63 DAAC3 This is a bit-mapped register.

U65 DAAC4 This is a bit-mapped register. 0x00E0

U66 DAAC5 This is a bit-mapped register. 0x0040

U67 ITC1 This is a bit-mapped register. 0x0008

U68 ITC2 This is a bit-mapped register. 0x0000

U6A ITC4 This is a bit-mapped register. N/A

U6C LVS This is a bit-mapped register. 0x0000

U6E CK1 This is a bit-mapped register. 0x1F20

U6F PTMR This is a bit-mapped register. 0x00FF

U70 IO0 This is a bit-mapped register. 0x2700

U71 IO1 This is a bit-mapped register. 0x0000

U76 GEN1 This is a bit-mapped register. 0x3240

U77 GEN2 This is a bit-mapped register. 0x401E

U78 GEN3 This is a bit-mapped register. 0x0000

U79 GEN4 This is a bit-mapped register. 0x0000

U7A GENA This is a bit-mapped register. 0x0000

U83 NOLN No-Line threshold. If %V1 is set, NOLN sets the threshold for determination of

line present vs. line not present.

0x0001

U84 LIUS Line-in-use threshold. If %V1 is set, LIUS sets the threshold for determination

of line in use vs. line not in use.

0x0007

U85 NLIU Line-in-use/No line threshold. If %V2 is set, NLIU sets the threshold reference

for the adaptive algorithm (see %V2).

0x0000

U87 SAM This is a bit-mapped register 0x0000

Table 15. U-Register Description (Continued)