7-8
DSP56309UM/D MOTOROLA
Enhanced Synchronous Serial Interface (ESSI)
ESSI Programming Model
7.3.6
Serial Control Signal (SC2)
SC02 is a serial control signal for ESSI0, and SC12 is a serial control signal for ESSI1. They
are referred to collectively as SC2.
This signal is used for frame sync I/O. SC2 is the frame sync for both the transmitter and
receiver in synchronous mode and for the transmitter only in asynchronous mode. The
direction of this signal is determined by the SCD2 bit in the CRB. When configured as an
output, this signal outputs the internally generated frame sync signal. When configured
as an input, this signal receives an external frame sync signal for the transmitter in
asynchronous mode and for the receiver when in synchronous mode. SC2 can be
programmed as a GPIO signal (P2) when the ESSI SC2 function is not being used.
7.4
ESSI PROGRAMMING MODEL
The ESSI includes the following registers:
¥ Two control registers (CRA, CRB) illustrated in
¥ One status register (SSISR) illustrated in
Table 7-1
ESSI Clock Sources
SYN
SCKD
SCD0
R Clock
Source
RX
Clock
Out
T Clock
Source
TX Clock Out
Asynchronous
0
0
0
EXT, SC0
Ñ
EXT, SCK
Ñ
0
0
1
INT
SC0
EXT, SCK
Ñ
0
1
0
EXT, SC0
Ñ
INT
SCK
0
1
1
INT
SC0
INT
SCK
Synchronous
1
0
0/1
EXT, SCK
Ñ
EXT, SCK
Ñ
1
1
0/1
INT
SCK
INT
SCK
Содержание DSP56309
Страница 25: ...xxii DSP56309UM D MOTOROLA Figure D 25 Port E Registers PCRE PRRE PDRE D 39 ...
Страница 30: ...MOTOROLA DSP56309UM D 1 1 SECTION 1 DSP56309 OVERVIEW ...
Страница 47: ...1 18 DSP56309UM D MOTOROLA DSP56309 Overview DSP56309 Architecture Overview ...
Страница 48: ...MOTOROLA DSP56309UM D 2 1 SECTION 2 SIGNAL CONNECTION DESCRIPTIONS ...
Страница 85: ...2 38 DSP56309UM D MOTOROLA Signal Connection Descriptions OnCE JTAG Interface ...
Страница 86: ...MOTOROLA DSP56309UM D 3 1 SECTION 3 MEMORY CONFIGURATION ...
Страница 104: ...MOTOROLA DSP56309UM D 4 1 SECTION 4 CORE CONFIGURATION ...
Страница 124: ...MOTOROLA DSP56309UM D 5 1 SECTION 5 GENERAL PURPOSE I O ...
Страница 125: ...5 2 DSP56309UM D MOTOROLA General Purpose I O 5 1 INTRODUCTION 5 3 5 2 PROGRAMMING MODEL 5 3 ...
Страница 128: ...MOTOROLA DSP56309UM D 6 1 SECTION 6 HOST INTERFACE HI08 ...
Страница 166: ...MOTOROLA DSP56309UM D 7 1 SECTION 7 ENHANCED SYNCHRONOUS SERIAL INTERFACE ESSI ...
Страница 212: ...MOTOROLA DSP56309UM D 8 1 SECTION 8 SERIAL COMMUNICATION INTERFACE SCI ...
Страница 241: ...8 30 DSP56309UM D MOTOROLA Serial Communication Interface SCI GPIO Signals and Registers ...
Страница 242: ...MOTOROLA DSP56309UM D 9 1 SECTION 9 TRIPLE TIMER MODULE ...
Страница 269: ...9 28 DSP56309UM D MOTOROLA Triple Timer Module Timer Operational Modes ...
Страница 270: ...MOTOROLA DSP56309UM D 10 1 SECTION 10 ON CHIP EMULATION MODULE ...
Страница 302: ...MOTOROLA DSP56309UM D 11 1 SECTION 11 JTAG PORT ...
Страница 369: ...C 22 DSP56309UM D MOTOROLA DSP56309 BSDL Listing ...
Страница 370: ...MOTOROLA DSP56309UM D D 1 APPENDIX D PROGRAMMING REFERENCE ...
Страница 405: ......
Страница 409: ......