7-24
DSP56309UM/D MOTOROLA
Enhanced Synchronous Serial Interface (ESSI)
ESSI Programming Model
The TE1 bit is cleared by either a hardware RESET signal or a software RESET
instruction.
Note:
The setting of the TE1 bit does not affect the generation of frame sync or
output flags.
7.4.2.16
CRB ESSI Transmit 0 Enable (TE0) Bit 16
The TE0 bit enables the transfer of data from TX0 to transmit shift register 0. TE0 is
functional when the ESSI is in either synchronous or asynchronous mode.
When TE0 is set and a frame sync is detected, the transmitter 0 is enabled for that frame.
When TE0 is cleared, transmitter 0 is disabled after completing transmission of data
currently in the ESSI transmit shift register. The STD output is tri-stated, and any data
present in TX0 is not transmitted (i.e., data can be written to TX0 with TE0 cleared; the
TDE bit is cleared, but data is not transferred to the transmit shift register 0).
The TE0 bit is cleared by either a hardware RESET signal or a software RESET
instruction.
The transmit enable sequence for on-demand mode can be the same as for normal mode,
or TE0 can be left enabled.
Note:
Transmitter 0 is the only transmitter that can operate in asynchronous mode
(SYN = 0). TE0 does not affect the generation of frame sync or output flags.
summarizes the preceding sections; it shows possible settings of control bits
and their associated signals.
Table 7-4
Mode and Signal Definition Table
Control Bits
ESSI Signals
SYN
TE0
TE1
TE2
RE
SC0
SC1
SC2
SCK
STD
SRD
0
0
X
X
0
U
U
U
U
U
U
0
0
X
X
1
RXC
FSR
U
U
U
RD
0
1
X
X
0
U
U
FST
TXC
TD0
U
0
1
X
X
1
RXC
FSR
FST
TXC
TD0
RD
1
0
0
0
0
U
U
U
U
U
U
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: ......