TV Converter Box User Manual

Operational Overview
7
Interfacing the TLV1562 Parallel ADC to the TMS320C54x DSP
3.3 Connections Between the DSP and the EVM
The following connections provide the interface between the DSP and the EVM:
Table 1. Signal Connections
DSP Signal Connector/Pin on the DSKplus cir-
cuit board
Connector/Pin on
the TLV1562EVM
ADC Signal
General
GND Connector JP4: Pin 1, 10, 11, 12, 14,
15, 19, 20, 21, 27, 34, 35
Connector JP5: Pin 6, 10, 11, 12

J10/2,J10/4,...,J10/34
J11/4,J11/6,...,J11/26
GND
VCC JP1/32  N/A VCC
Parallel Interface
CLKOUT JP3/2  J11/11 CLKIN
INT0
JP5/1  J11/5 INT
XF JP4/8  J11/3 RD
R/W JP4/30  J11/9 decoded to the WR line
IOSTRB JP4/36  J11/7 decoded to the WR line
A0 JP5/34  J11/2 addr. decoder for CS and CSTART
A1 JP5/35  J11/1 addr. decoder for CS and CSTART
D0 JP3/35  J10/13 D0
D1 JP3/34  J10/15 D1
D2 JP3/8  J10/17 D2
D3 JP3/12  J10/19 D3
D4 JP3/11  J10/21 D4
D5 JP3/15  J10/23 D5
D6 JP3/14  J10/25 D6
D7 JP3/18  J10/27 D7
D8 JP3/17  J10/29 D8
D9 JP3/21  J10/31 D9
Serial Interface to the DAC TLC5618A
BCLKR JP1/14  J11/25 SCLK
BCLKX JP1/17  J11/23 SCLK
BFSR JP1/20  J11/21 CS
BFSX JP1/23  J11/19 CS
BDR JP1/26  J11/17 DIN
BDX JP1/29  J11/15 DIN
Signals D[9–0] of the TLV1562 and D[9–0] of the DSP are tied together in this
application to simplify hardware debugging during the development phase.
However, if the 2s complement feature of the DAC is to be used, it is easier to
connect D[15-6] of the DSP with D[9–0] of the ADC. A simple right shift of the
result then evaluates the result when sign extension mode (SXM) is enabled.