Texas Instruments ADS8364, 65MEVM manual Parallel Control, Parallel Data, GPIO/Control Options

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Digital Interface

Jumpers W4 and W6 control the signals applied to A0, A1, A2, and CS. In the factory default mode, W6 is closed by means of a shunt jumper. The Ax and CS pins are controlled by the signals applied to J5 (top or bottom side). When used with either the 5-6K or HPA-MCU Interface Boards, these control signals are associated with the host processors address bus.

By removing the shunt jumper located at W6, the A0, A1, and A2 pins are controlled by shunt jumpers placed on W4. The CS pin is routed to J5.1, which requires the application of an active-low Chip Select signal. A simple shunt jumper placed across J5 pins 1-2 can be used to force the CS pin to ground if desired.

4.1Parallel Control

Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket combination at J5 (Table 2). This header/socket provides access to the digital control pins of the EVM. Consult Samtec at www.samtec.com or 1-800-SAMTEC-9 for a variety of mating connector options.

		Table 2. Header/Socket Combinations at J5
Pin Number	Signal	Description
J5.1	DC_CSa	Daughter Card Chip Select – active-low signal used to access the EVM
J5.3	DC_AWE	Write Strobe – signal not used on the ADS8364/65M EVM
J5.5	DC_ARE	Read Strobe – active-low signal used to access parallel data
J5.7	EVM_A0	EVM Address line 0 – used with U3 to control A0
J5.9	EVM_A1	EVM Address line 1 – used with U3 to control A1
J5.11	EVM_A2	EVM Address line 2	– used with U3 to control A2
J5.13	EVM_A3	EVM Address line 3	– used with U3 and U6 to control CS
J5.15	EVM_A4	EVM Address line 4	– not used
J5.17	DC_TOUT	Timer Input – optional CLK input used with W8
J5.19	DC_INTa	Interrupt Output to Host Processor – connects to the ADC EOC pin

4.2Parallel Data

The ADS8364/65MEVM uses Samtec part numbers SSW-116-22-F-D-VS-K and TSM-116-01-T-DV-P to provide a convenient 16-pin, dual-row header/socket combination at J6. This header/socket combination provides access to the parallel data pins of the ADS7864. Data line D0 is connected to J6 pin 1. Data lines 1–15 are located on pins 3–31, respectively. Even pin numbers 2–32 are connected to digital ground.

4.3GPIO/Control Options

Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a 10-pin, dual-row, header/socket combination at J1 to facilitate general-purpose input/output (GPIO) control options to the ADS836x device installed on the EVM. Table 3 describes the functions and pinout of J1.

SLAU189 –September 2006 ADS8364/65MEVM 5

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