CS62180 datasheet(37/50 Pages) CIRRUS

37 / 50 page

SDO - Serial Data Out, Pin 16 (PLCC, Pin 18).

When reading the serial port, data is output LSB first. Data is updated on the falling edge of

SCLK and held to the next falling edge. SDO goes to a high impedance state when CS is high

or after the rising edge of SCLK corresponding to the output of the MSB (last bit output).

Hardware Mode Control Pins

Pins 14 - 18 (PLCC, 16 - 20) are multifunctional. When in Host mode, they operate as serial

interface pins. When in hardware mode, they are redefined as mode control pins. Their host

mode operation is described separately under Host Mode Serial Interface, above. SPS must be

tied low to enable hardware mode.

193SI - 193S S-bit Insertion, Pin 14 (PLCC, Pin 16).

In hardware mode, this pin is redefined as a control pin and maps directly to TCR.2. Holding

the pin low while in 193S framing format, configures the CS62180B to generate the

FS framing pattern internally for transmission. Pulling 193SI high allows external insertion

of transmitted S-bits via TLINK.

FM - Frame Mode Select, Pin 15 (PLCC, Pin 17).

In hardware mode, this pin is redefined as a control pin and maps directly to CCR.4. Holding

the FM pin low configures the CS62180B for 193S framing format, pulling it high selects the

193E format.

TYEL - Transmit Yellow Alarm, Pin 16 (PLCC, Pin 18).

In hardware mode, this pin is redefined as a control pin and maps directly to TCR.0. Pulling the

TYEL pin high enables transmission of a yellow alarm in the default format. In 193S mode

yellow alarms default to a "0" in bit 2 (D6) of all DS0 channels. In 193E mode, yellow alarms

are encoded/decoded as a repeating pattern of 00FF (hex) on the FDL.

B7 - Bit 7 Zero Suppression, Pin 17 (PLCC, Pin 19).

In hardware mode, this pin is redefined as a control pin and maps directly to CCR.1. Holding

the B7 pin low disables bit 7 stuffing (B7) for transparent operation. Pulling the pin high

enables B7 zero suppression. Pulling the B7 and B8ZS pins high simultaneously puts the

CS62180B into loopback operation.

B8ZS - Bipolar Eight Zero Suppression, Pin 18 (PLCC, Pin 20).

In hardware mode, this pin is redefined as a control pin and maps directly to CCR.2. On the

CS62180B, pulling the B8ZS pin high enables B8ZS zero suppression in just the transmitter,

since the CS62180B receiver is always capable of receiving either B8ZS or AMI-encoded data.

Pulling the B7 and B8ZS pins high simultaneously puts the CS62180B into loopback

operation.

CS62180B

DS225PP2

CS62180 датащи(PDF) 37 Page - Cirrus Logic