bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet - Page 135
bt8375kpf
Manufacturer Part Number
bt8375kpf
Description
Single Chip Transceivers For T1/e1 And Integrated Service Digital Network Isdn Primary Rate Interfaces Systems
Manufacturer
Conexant Systems, Inc.
Datasheet
1.BT8375KPF.pdf
(323 pages)
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Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
All events reported in ISR6 are from dual-edge sources, except the 1-second timer [ONESEC] and Transmit
Pulse Density Violation [TPDV]. Any transition of real-time status in the Alarm 2 Status register [ALM2;
addr 048] forces the corresponding ISR6 status bit active (high). Active-high status is latched and held
according to the LATCH_ALM bit [addr 046]. Each event triggers an interrupt if the corresponding IER6 bit is
enabled [addr 00D].
LOOPDN
LOOPUP
TPDV
TSHORT
TLOC
TLOF
ONESEC
N8370DSE
005— Alarm 2 Interrupt Status (ISR6)
LOOPDN
7
Loss/Recovery of Inband Loopback Deactivate Code—Reports any change in real-time status
of inband loopback deactivate code detector.
Loss/Recovery of Inband Loopback Activate Code—Reports any change in real-time status of
inband loopback activate code detector.
Transmit PDV Monitor/Enforcer—Applicable only if TZCS [addr 071] enables PDV
enforcement. When enabled, TPDV is latched active if 1 or more PDV-enforced 1s were
output to meet ANSI T1.403 minimum pulse density requirements.
Loss/Recovery of Transmit Short Circuit—Reports any change in real-time status of transmit
line driver's short circuit detector.
Loss/Recovery of Transmit Clock—Reports any change in real-time status of TCKI clock
monitor.
Loss/Recovery of Transmit Frame Alignment—Reports any change in real-time status of
transmit framer's basic alignment.
1-second Timer Event—ONESEC is derived from the internal 1-second timer or the rising
edge of ONESEC input signal, according to the selected I/O mode [PIO; addr 018].
LOOPUP
6
TPDV
5
0 = no event
1 = LOOPDN code transition
0 = no event
1 = LOOPUP code transition
0 = no error
1 = PDV-enforced 1
0 = no alarm
1 = short circuit transition
0 = no alarm
1 = clock monitor transition
0 = no alarm
1 = transmit framer transition
0 = no timer event
1 = ONESEC timer expired or rising edge of ONESEC input
TSHORT
4
Conexant
TLOC
3
—
2
3.4 Interrupt Status Registers
TLOF
1
3.0 Registers
ONESEC
0
3-17
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