Hayes Microcomputer Products RCV56HCF Bus Interface Pin Signal Definitions Cont’d, DAA Interface

		RCV56HCF PCI/CardBus Modem Designer’s Guide
			Table 3-2. Bus Interface Pin Signal Definitions (Cont’d)
Label	I/O Type		Signal Name/Description
			PCI BUS INTERFACE (CONTINUED)
PERR#	I/Opsts		Parity Error. PERR# is used for the reporting of data parity errors.
	(s/t/s)
SERR#	Ood		System Error. SERR# is an open drain output asserted to report address parity errors, data parity errors on
	(o/d)		the Special Cycle command, or any other system error where the result will be catastrophic.
INTA#	Ood		Interrupt A. INTA# is an open drain output asserted to request an interrupt.
	(o/d)
			SERIAL EEPROM INTERFACE (NMC93C56 OR EQUIVALENT)
SROMCLK	Ot2		Serial ROM Shift Clock. Connect to SROM SK input.
SROMCS	Ot2		Serial ROM Chip Select. Connect to SROM CS input.
SROMIN	It		Serial ROM Instruction, Address, and Data In. Connect to SROM DO output.
SROMOUT	Ot2		Serial ROM Device Status and Data Out. Connect to SROM DI input.
			DAA INTERFACE
OH_L1#	Ot12		Off-Hook Relay Control. Output (typically active low) used to control the normally open off-hook relay. The
			polarity of this output is configurable.
CID_L1#	Ot12		Caller ID Relay Control. Output (typically active low) used to control the normally open Caller ID relay. The
			polarity of this output is configurable.
VOICE#	Ot12		Voice Relay Control. Output (typically active low) used to control the normally open. The polarity of this
			output is configurable.
MUTE_L1#	Ot12		Mute Relay Control. Output (typically active low) used to control the normally open mute relay. The polarity
			of this output is configurable.
IRING_L1#	It		Ring Indicate. A high-going edge used to initiate presence of a ring frequency. Typically connected to the
			output of an optoisolator or equivalent. The idle state (no ringing) output of the ring detect circuit should be
			low.
LCS_L1#	It		Line Current Sense. Active low input used to indicate handset off-hook status.
RH_L1#	It		Remote Hangup. Active low input used to indicate hangup of the remote modem or telephone, i.e. the
			remote modem/telephone has released the line (gone on-hook).
USED_L1	Ot12		Extension Offhook. Active high input used to indicate the telephone line is in use by the local handset or an
			extension phone.
LCS_H1#	It		Line Current Sense Handset 1. Active low input used to indicate off-hook status from handset 1.
ORING_H1	Ot12		Ring Output Handset 1. Active high output used to indicate ring signal to handset 1.
LCS_H2#	It		Line Current Sense Handset 2. Active low input used to indicate off-hook status from handset 2.
ORING_H2	Ot12		Ring Output Handset 2. Active high output used to indicate ring signal to handset 2.
I/O0-I/O4	It/Ot12		Reserved.

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