參數(shù)資料
型號(hào)： PCT789T-A
英文描述： PCI HSP56 World MicroModem/PCT303DW/PCT1789W
中文描述： 世界MicroModem/PCT303DW/PCT1789W的PCI HSP56
文件頁(yè)數(shù)： 11/70頁(yè)
文件大?。?/td> 872K
代理商： PCT789T-A
PC-TEL, Inc.
11
1789W0DOCDAT06A-0299
PCT1789W DATA SHEET
PCT789T-A P
IN
D
ESCRIPTION
!
PRELIMINARY
PRELIMINARY
TRDY*
13
s/t/s
PCI
Target ready. This signal indicates the target agent’s ability to complete
the current data phase of the transaction.
Power management event. A power management event is requested
via the assertion of this signal.
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.
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.
PME*
89
t/s
PCI
CLKRUN*
70
in,
o/d
PCI
SERR*
18
o/d
PCI
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.
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.
Voice relay control output. For systems that support voice playback and
recording, this pin is used for controlling the handset relay. It is driven
by bit 2 of the external output register.
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.
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.
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.
AFE reset output for external CODEC. This pin is used as the AFE reset
signal for external CODEC.
Power-down output for external CODEC. This pin is used as the AFE
power-down signal for external CODEC.
Receive frame synchronization input. This signal is driven by external
CODEC to inform the PCT789T-A that a new frame of serial data is to
be received from ISDI line.
Serial data output to external CODEC. The serial data output for the
DAC is driven through this pin to the external CODEC.
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.
Serial clock input. The serial clock is driven by external CODEC as the
reference clock for serial data communication between external
CODEC and PCT789T-A.
OCID-RELAY
77
O
8mA
OHNDSET
78
O
8mA
PU
OMUTE*
75
O
4mA
IRING
79
I
PU
ILC-SENSE
80
I
PU
OAFERST*
74
O
4mA
PU
4mA
PU
4mA
PU
OPD
73
O
IFSI
72
I
OSDO
71
O
4mA
PU
PU
ISDI
81
I
ISCLK
82
I
4mA
PU
Table 3 PCT789T-A Pin Description (Continued)
Name
Numbers
I/O
Typ
e
Description
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