Figure 7-1 Essi Block Diagram - Motorola DSP56309 User Manual

Interrupts
7.3.3 Serial Clock (SCK)
The SCK signal is a bidirectional signal providing the serial bit rate clock for the ESSI
interface. The SCK signal is a clock input or output used by all the enabled transmitters
and receiver in synchronous modes or by all the enabled transmitters in asynchronous
MOTOROLA
GDB DDB
RSMA
RSMB
TSMA
TSMB
CRA
CRB
TSR
SSISR
Clock/Frame Sync Generators and Control Logic

Figure 7-1 ESSI Block Diagram

DSP56309UM/D
Enhanced Synchronous Serial Interface (ESSI)
ESSI Data and Control Signals
RCLK
RX SHIFT REG
TCLK
TX0 SHIFT REG
TX1 SHIFT REG
TX2 SHIFT REG
SRD
RX
STD
TX0
SC0
TX1
SC1
TX2
SC2
SCK
AA0678
7-5