CN8380 Datasheet, PDF (26/91 Pages) Conexant Systems, Inc – integrated quad line interface unit unit for both 1.544 Mbps (T1) and 2.048 Mbps (E1) applications

2.0 Circuit Description
2.2 Configuration and Control
Figure 2-2. Host Serial Port Signals
CS
Read Timing
CN8380
Quad T1/E1 Line Interface
SCLK
SDI
SDO
R/W A0 A1 A2 A3 A4 A5 A6
Address/Control Byte
D0 D1 D2 D3 D4 D5 D6 D7
Register Data Byte
Write Timing
CS
SCLK
SDI
SDO
8380_007
R/W A0 A1 A2 A3 A4 A5 A6 D0 D1 D2 D3 D4 D5 D6 D7
Address/Control Byte
Register Data Byte
2.2.4 Reset
The CN8380 supports three reset methods: power-on reset, hard reset initiated by
the RESET pin, and soft reset initiated by the RESET bit in the Global
Configuration Register [GCR; addr 01]. In Host Mode, all three reset methods
produce the same results as listed below. In Hardware Mode, power-on reset and
hard reset produce the same results as shown; and soft reset is not applicable.
After RESET is complete, the following is true:
Hardware Mode
Digital receiver outputs
(RPOSO[1:4] and RNEGO[1:4],
RCKO[1:4]) are enabled.
Host Mode
Digital receiver outputs (RPOSO[1:4]
and RNEGO[1:4], RCKO[1:4]) are
three-stated.
Transmitter line outputs (XTIP[1:4] Transmitter line outputs (XTIP[1:4]
and XRING[1:4]) are enabled
and XRING[1:4]) are three-stated.
(controlled by XOE).
2-4
Conexant
N8380DSA
Advance Information