Silicon Laboratories SI2493/57/34/15/04, SI2494/39 manual Programming Examples, Quick Reference

AN93

6. Programming Examples

The following programming examples are intended to facilitate the evaluation of various modem features and serve as example command strings that can be used singly or in combination to create the desired modem operation.

6.1. Quick Reference

Table 88 summarizes the modem function/feature and the associated hardware pins, AT commands, S registers, and U registers. When a command string is created to enable a particular feature, Table 88 should be reviewed to make sure all necessary commands and registers have been considered.

Table 88. Modem Feature vs. Hardware, AT Command and Register Setting

Function/Feature	AT Commands	S Registers	U Registers
Autobaud	\T16, \T17
Blacklisting	%B	42, 43, 44
Type I Caller ID	+VCID, +VCDT		U70 [12,4]
Type II Caller ID	+PCW
	+VCID
	+VCIDR
Country-dependent settings			U0–U4C, U4D [10,1,0], U50–U52,
			U62 [8], U67 [6, 3:2, 1, 0],
			U68 [2, 1, 0], U69 [6, 5, 4]
DTE interface	En, \Bn, \Pn, \Qn,
	\Tn, \U
DTMF dialing	D	6, 8, 14	U46–U48, U4E
EEPROM	:E, :M
Escape (parallel/SPI)			U70 [15], Parallel Register 1 [2]
Escape (UART)	\B6	12	U70 [13,15]
Intrusion detection			U6A [1], U69 [2], U70 [10, 2],
			U76 [15:9, 8, 7:5, 4:0], U77 [15:12, 11],
			U78 [15:14, 7:0], U79 [4:0], UAE
Line rate	&Gn, &Hn
Modem-on-hold	+PCW
	+PMHF
	+PMHR
	+PMHT
	+PMH
	+ATO
Overcurrent detection			U67 [7], U70 [11, 3],
			U77 [10, 9, 8:0], U79 [4:0]
Power control	&Z	24	U65 [13]
Pulse dialing	D	6, 8, 14	U37–U45, U4E

132 Rev. 1.3