Cirrus Logic CS61880 User Manual
Page 13
CS61880
DS450PP3
13
INTL/MOT/CODEN
88
H12
I
Intel/Motorola/Coder Mode Select Input
Parallel Host Mode - When this pin is “Low” the micropro-
cessor interface is configured for operation with Motorola
processors. When this pin is “High” the microprocessor in-
terface is configured for operation with Intel processors.
Hardware Mode - When the CS61880 is configured for uni-
polar operation, this pin, CODEN, configures the line
encoding/decoding function. When CODEN is low, HDB3
encoders/decoders are enabled. When CODEN is high,
AMI encoding/decoding is activated. This is done for all
eight channels.
TXOE
114
E14
I
Transmitter Output Enable
Host mode - Operates the same as in hardware mode. In-
dividual drivers can be set to a high impedance state via
the
page 38).
Hardware Mode - When TXOE pin is asserted Low, all the
TX drivers are forced into a high impedance state. All other
internal circuitry remains active.
CLKE
115
E13
I
Clock Edge Select
In clock/data recovery mode, setting CLKE “high” will cause
RPOS/RNEG to be valid on the falling edge of RCLK and
SDO to be valid on the rising edge of SCLK. When CLKE is
set “low”, RPOS/RNEG is valid on the rising edge of RCLK,
and SDO is valid on the falling edge of SCLK. When the
part is operated in data recovery mode, the RPOS/RNEG
output polarity is active “high” when CLKE is set “high” and
active “low” when CLKE is set “low”.
SYMBOL
LQFP
FBGA
TYPE
DESCRIPTION