bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet - Page 27
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
Table 1-1. Hardware Signal Definitions (8 of 8)
N8370DSE
CLADI
REFCKI
CLADO
TDI
TMS
TDO
TCK
VDD[6:0]
GND[6:0]
NOTE(S):
1. I = Input, O = Output
2. PIO = Programmable I/O; controls located at address 018.
3. Multiple signal names show mutually exclusive pin functions.
4. All output pins power up in the high-impedance state within 3,000 cycles of the applied REFCKI (see POE; addr 019,
Pin Label
SBI_OE; addr 0D0).
CLAD Input
Reference Clock
CLAD Output
JTAG Test Data Input
JTAG Test mode
Select
JTAG Test Data
Output
JTAG Test Clock
Power
Ground
Signal Name
I/O
O
O
I
I
I
I
I
I
I
Clock Rate Adapter (CLAD)
Optional CLAD input timing reference used to phase lock CLADO and JCLK
System must apply a 10 MHz 50 ppm clock signal to act as frequency
CLADO is configured to operate at 1 of 14 different clock frequencies (see
Test clock input per IEEE Std 1149.1-1990. Used for all test interface and
+5 VDC 5%
outputs to 1 of 44 different input clock frequencies selected in the range of
8 kHz to 16384 kHz (see [CLAD registers; addr 090–092]).
reference for internal Numerical Controlled Oscillator (NCO). REFCKI
determines frequency accuracy and stability of CLADO and jitter attenuator
(JCLK) clocks when the NCO operates in free running mode (see [JFREE;
addr 002]).
internally to generate clocks of various frequencies, locked to a selected
receive, transmit, or external clock. Hence, REFCKI is always required.
[CSEL; addr 091]) that include T1, E1 or system bus rates. CLADO is
typically programmed to supply RSB and TSB clocks that are
phase-locked to the selected transmit, receive or CLADI timing reference
(see [JEN; addr 002 and CEN; addr 090]). On the Bt8376 device, CLAD0
drives low when enabled.
Test data input per IEEE Std 1149.1-1990 . Used for loading all serial
instructions and data into internal test logic. Sampled on the rising edge of
TCK. TDI can be left unconnected if it is not being used because it is pulled
up internally.
Active-low test mode select input per IEEE Std 1149.1-1990 . Internally
pulled-up input signal used to control the test-logic state machine.
Sampled on the rising edge of TCK. TMS can be left unconnected if it is
not being used because it is pulled up internally.
Test data output per IEEE Std 1149.1-1990 . Three-state output used for
reading all serial configuration and test data from internal test logic.
Updated on the falling edge of TCK.
internal test-logic operations. If unused, TCK must be pulled low.
0 VDC
Power Supply
Conexant
REFCKI is the baseband reference for all CLAD/JAT functions and is used
Test Access
Definition
1.0 Pin Descriptions
1.1 Pin Assignments
1-11
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