Rainbow Electronics DS2182A - Manual (Page 4)

DS2182A
041995 4/22
PORT PIN DESCRIPTION Table 2
PIN SYMBOL TYPE DESCRIPTION
1 INT O Receive Alarm Interrupt. Flags host controller during alarm conditions.
Active low; open drain output.
2 SDI I Serial Data In. Data for onboard registers. Sampled on rising edge of
SCLK.
3 SDO O 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.
4 CS I Chip Select. Must be low to read or write the serial port.
5 SCLK I Serial Data Clock. Used to read or write the serial port registers.
POWER AND TEST PIN DESCRIPTION Table 3
PIN SYMBOL TYPE DESCRIPTION
14 V
SS
– Signal Ground. 0.0 volts.
20 TEST I Test Mode. Tie to V
SS
for normal operation.
28 V
DD
– Positive Supply. 5.0 volts.
REGISTER SUMMARY Table 4
REGISTER ADDRESS DESCRIPTION/FUNCTION
BVCR2 0000 Bipolar Violation Count Register 2. LSW of a 16-bit presettable counter
that records individual bipolar violations.
BVCR1 0001 Bipolar Violation Count Register 1. MSW of a 16-bit presettable count-
er that records individual bipolar violations.
CRCCR 0010 CRC Error Count Register. 8-bit presettable counter that records CRC6
errored words in the 193E frame mode.
OOFCR 0011 OOF Count Register. 8-bit presettable counter that records OOF events.
OOF events are defined by RCR1.5 and RCR1.6.
FECR 0100 Frame Error Count Register. 8-bit presettable counter that records indi-
vidual bit errors in the framing pattern.
RSR1 0101 Receive Status Register 1. Reports alarm conditions.
RIMR1 0110 Receive Interrupt Mask Register 1. Allows masking of individual alarm-
generated interrupts from RSR1.
RSR2 0111 Receive Status Register 2. Reports alarm conditions.
RIMR2 1000 Receive Interrupt Mask Register 2. Allows masking of individual alarm-
generated interrupts from RSR2.
RCR1 1001 Receive Control Register 1. Programs device operating characteristics.
RCR2 1010 Receive Control Register 2. Programs device operating characteristics.