DS2182A Dallas Semiconducotr, DS2182A Datasheet - Page 4

• Manufacturer Part Number: DS2182A
• Description: T1 Line Monitor
• Manufacturer: Dallas Semiconducotr

PIN DESCRIPTION Table 2
POWER AND TEST PIN DESCRIPTION Table 3
REGISTER SUMMARY Table 4
SERIAL PORT INTERFACE
The port pins of the DS2182A serve as a microprocessor/ microcontroller-compatible serial port. Eleven
on-board registers allow the user to update operational characteristics and monitor device status via a host
controller, minimizing hardware interfaces. The port on the DS2182A can be read from or written to at
any time. Serial port reads and writes are independent of T1 line timing signals RCLK, RPOS, and
RNEG. However, RCLK is needed in order to clear RSR1 and RSR2 after reads.
ADDRESS/COMMAND
Reading or writing the control, configuration or status registers requires writing one address/command
byte prior to transferring register data. The first bit written (LSB) of the address/command word specifies
REGISTER
PIN
PIN
14
20
28
1
2
3
4
5
CRCCR
OOFCR
BVCR2
BVCR1
RIMR1
RIMR2
FECR
RCR1
RCR2
RSR1
RSR2
SYMBOL
SYMBOL
SCLK
TEST
SDO
INT
V
SDI
V
CS
DD
SS
ADDRESS
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
TYPE
TYPE
O
O
I
I
I
-
I
-
DESCRIPTION
Receive Alarm Interrupt. Flags host controller during alarm conditions.
Active low; open drain output.
Serial Data In. Data for onboard registers. Sampled on rising edge of SCLK.
Serial Data Out. Control and status information from onboard registers.
Updated on falling edge of SCLK; tri-stated during serial port write or
when CS is high.
Chip Select. Must be low to read or write the serial port.
Serial Data Clock. Used to read or write the serial port registers.
DESCRIPTION
Signal Ground. 0.0 volts.
Test Mode. Tie to V
Positive Supply. 5.0 volts.
Bipolar Violation Count Register 2. LSW of a 16-bit presettable counter that
records individual bipolar violations.
Bipolar Violation Count Register 1. MSW of a 16-bit presettable counter that
records individual bipolar violations.
CRC Error Count Register. 8-bit presettable counter that records CRC6 errored
words in the 193E frame mode.
OOF Count Register. 8-bit presettable counter that records OOF events. OOF
events are defined by RCR1.5 and RCR1.6.
Frame Error Count Register. 8-bit presettable counter that records individual
bit errors in the framing pattern.
Receive Status Register 1. Reports alarm conditions.
Receive Interrupt Mask Register 1. Allows masking of individual alarm-
generated interrupts from RSR1.
Receive Status Register 2. Reports alarm conditions.
Receive Interrupt Mask Register 2. Allows masking of individual alarm-
generated interrupts from RSR2.
Receive Control Register 1. Programs device operating characteristics.
Receive Control Register 2. Programs device operating characteristics.
4 of 25
SS
DESCRIPTION/FUNCTION
for normal operation.
DS2182A