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參數(shù)資料
| 型號： | Z0220516SSCR4292 |
| 英文描述： | Modem Controller |
| 中文描述： | 調制解調器控制器 |
| 文件頁數(shù)： | 6/48頁 |
| 文件大小： | 1331K |
| 代理商： | Z0220516SSCR4292 |
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Z02201
V.22bis Data Pump with Integrated AFE
ZiLOG
6
Z02201
PS000902-0501
PIN FUNCTIONS
HD7
–
HD0
HD0
–
HD7
for the transfer of control and status information.
Host Data Bus
constitutes an 8-bit bidirectional data bus used
(Bidirectional, Active High).
HCS
Low, data transfer between the data pump and the host is
enabled. Data transfers to the data pump registers are 8 bits
wide.
Host Chip Select
(Input, Active Low).
When
CS
is
HWR
The write enable strobe is an active Low signal that is used
to initiate a write operation to the data pump. During a write
operation, data is sent to the data pump by the host via the
host data bus.
Host Write Enable Strobe
(Input, Active Low).
HRD
The read enable strobe is an active Low signal that is used
to initiate a read operation from the data pump. During a
read operation, data is transferred out of the data pump by
the host via the host data bus.
Host Read Enable Strobe
(Input, Active Low).
HIRQ
The
an external pull-up resistor to the digital power supply V
The
HIRQ
active Low data pump output can be activated
when the host selects this option or requests by setting the
RXIE
or
TXIE
bits in the data pump Host Register. This pin
can be connected to the host interrupt request pin to initiate
host service.
Host Interrupt Request
HIRQ
is an open-drain output that can be tied through
(Output, Active Low).
DD
.
RESET
places the device into its reset state.
Reset
(Input, Active Low).
The
RESET
signal
HA2
–
HA0
three register select lines (pins) are used for addressing the
controller-accessible internal registers of the data pump.
When
HCS
is active, the state of the
the internal data pump interface register address.
the most significant bit; HA0 is the least significant bit.
Host Address
(Input, Active High).
These
HA2
–
HA0
is used as
HA2
is
RLSD
Low).
detected.
Receive Line Signal Detect
This pin indicates when an input signal has been
(Output, Active
RXD
receive data is presented by the data pump to the local DTE
on the
RXD
output.
Receive Data
(Output).
The data pump serial
TCLK
data output clock is a synchronous data clock used to
transfer serial data via synchronous serial interface between
the data pump and the host. The clock frequencies are 2400,
Transmit Serial Data Clock
(Output).
The serial
1200, and 300 Hz, corresponding to the supported data bit
rates.
TXD
serial transmit data from the local DTE on the
when the data pump is configured to the serial transmit data
mode. The serial transmit data mode is selected when the
TDPM
bit (bit 4) of the
RAM CONTROL/DATA PUMP
STATUS
register (Register 6) is reset to 0.
Transmit Data
(Input).
The data pump accepts the
TXD
input
OH
This pin is activated to drive a relay which engages the
modem with the phone line (the modem equivalent of
picking up the receiver).
Off Hook Relay Control
(Output, Active Low).
RTS
OR of this pin and the RTSP bit (bit
3
of register 4),
determines the data pump mode of operation. When the
result of the logical OR of these two bits is logic
1
, then the
data pump is in transmit mode at the selected speed, thereby
placing the data pump in receive mode. In
STANDBY
mode, the state of this pin is insignificant.
Request To Send
(Input, Active Low).
The logical
EYECLK
Eye Pattern Clock
(Output, Active High).
Data
is valid at the rising edge of the clock. The
EYECLK
can be
used to clock an external Digital-to-Analog (D/A) converter
shift register for eye pattern display.
EYEOUT
Eye Pattern Data
(Output, Active High).
This
pin controls the serial 16-bit eye pattern output data. The
first 8 bits is the
EYEX
data, and the next 8-bits are the
EYEY
data. This data can be used for display on an oscilloscope
X and Y-axis following D/A conversion.
EYESTB
Serial Eye Pattern Strobe
(Output, Active
High).
This signal is used for loading an external D/A
converter.
TXO+
Transmit Differential Analog Output Positive
(Analog Output).
The TXO+, TXO– is capable of driving
a 600-ohm resistive load over a leased line or public
switched telephone network via a Data Access
Arrangement (DAA). The TXO– and TXO+ can be
configured either as a differential or single-ended output
driver.
TXO
–
Transmit Differential Analog Output Negative
(Analog Output).
The TXO–, TXO+ is capable of driving
a 600-ohm resistive load over a leased line or public
switched telephone network via a Data Access
Arrangement (DAA).
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