PCT1789W DATA SHEET
PRELIMINARY
PCT789T-A PIN DESCRIPTION
!!
Table 3 PCT789T-A Pin Description (Continued)
Typ
Name
Numbers I/O
Description
e
TRDY*
13
89
70
s/t/s PCI Target ready. This signal indicates the target agent’s ability to complete
the current data phase of the transaction.
PME*
t/s
PCI Power management event. A power management event is requested
via the assertion of this signal.
CLKRUN*
in,
o/d
PCI Clock running. This signal is used as an input for a device to determine
the status of CLK and an open drain output used by the device to
request starting or speeding up CLK.
SERR*
18
o/d PCI System error. This signal is used to report address parity errors, data
parity errors on the special cycle command, or any other catastrophic
system error.
Multi-Purpose Input/Output and Other Control Signals
OOFF-HOOK
76
O
8mA Off-hook relay control output. This pin is used as the active-high control
for the OFFHOOK Relay. It is driven by bit 0 of the external output regis-
ter.
OCID-RELAY
OHNDSET
77
78
O
O
8mA Caller-ID relay control output. This pin is used for controlling the Caller
ID relay. It is driven by bit 1 of the external output register.
8mA Voice relay control output. For systems that support voice playback and
PU recording, this pin is used for controlling the handset relay. It is driven
by bit 2 of the external output register.
OMUTE*
IRING
75
79
80
O
I
4mA Mute speaker. When active, this pin is used to mute the on-board
speaker so no signal monitoring on the telephone line can be heard. It is
driven by bit 3 of the external output register.
PU Ring detection input. It is used to indicate that the telephone ring is
detected. The IRING signal can be read by the host through bit 0 of
external input register.
ILC-SENSE
I
PU Loop current sense input or handset detection input. It is used to indi-
cate the state of Loop current sensing or the handset being on- or off-
hooked while in the voice playback and recording mode. The ILC-
SENSE signal can be read by the host through bit 1 of external input
register.
OAFERST*
OPD
74
73
72
O
O
I
4mA AFE reset output for external CODEC. This pin is used as the AFE reset
PU signal for external CODEC.
4mA Power-down output for external CODEC. This pin is used as the AFE
PU power-down signal for external CODEC.
IFSI
4mA Receive frame synchronization input. This signal is driven by external
PU CODEC to inform the PCT789T-A that a new frame of serial data is to
be received from ISDI line.
OSDO
ISDI
71
81
O
I
4mA Serial data output to external CODEC. The serial data output for the
PU DAC is driven through this pin to the external CODEC.
PU Serial data input from external CODEC. The serial data from ADC is
driven through this pin from external CODEC to the internal PCT core
logic.
ISCLK
82
I
4mA Serial clock input. The serial clock is driven by external CODEC as the
PU reference clock for serial data communication between external
CODEC and PCT789T-A.
PRELIMINARY
PC-TEL, Inc.
11
1789W0DOCDAT06A-0299
ETC [ ETC ]
