MX867P4 查看數據表（PDF） - MX-COM Inc
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MX867P4 Datasheet PDF : 42 Pages
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Low Power V.22 Modem
4
CMX867 Advance Information
2 Signal List
D2/E2/P4
Pin No.
1
2
3
4, 8, 12,
17, 21
5
6
7, 16, 24
9
10
11
13
14
15
18
19
20
22
23
Signal
Name
XTAL
Type
output
XTAL/CLOCK
input
RDRV
output
Description
The output of the on-chip Xtal oscillator inverter.
The input to the oscillator inverter from the Xtal circuit or
external clock source.
Relay drive output, low resistance pull down to VSS when
active and medium resistance pull up to VDD when inactive.
VSS
Power The negative supply rail (ground).
RD
RT
VDD
RXAFB
RXA
RXA
VBIAS
TXA
TXA
CS
COMMAND
DATA
SERIAL CLOCK
REPLY DATA
IRQ
input
bi-directional
Power
output
input
input
output
output
output
input
input
input
tri-state
output
Schmitt trigger input to the Ring signal detector. Connect to
VSS if Ring Detector not used.
Open drain output and Schmitt trigger input forming part of
the Ring signal detector. Connect to VDD if Ring Detector
not used.
The positive supply rail. Levels and thresholds within the
device are proportional to this voltage.
The output of the Rx Input Amplifier.
The inverting input to the Rx Input Amplifier
The non-inverting input to the Rx Input Amplifier
Internally generated bias voltage of approximately VDD/2,
except when the device is in ‘Powersave’ mode when VBIAS
will discharge to VSS. Should be de-coupled to VSS by a
capacitor mounted close to the device pins.
The inverted output of the Tx Output Buffer.
The non-inverted output of the Tx Output Buffer.
The C-BUS chip select input from the µC.
The C-BUS serial data input from the µC.
The C-BUS serial clock input from the µC.
A 3-state C-BUS serial data output to the µC. This output is
high impedance when not sending data to the µC.
A ‘wire-ORable’ output for connection to a µC Interrupt
Request input. This output is pulled down to VSS when
active and is high impedance when inactive. An external
pull-up resistor is required i.e. R1 of Figure 2.
Table 1: Signal List
2000 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480219.001
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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