Texas Instruments ADS8381EVM, Руководство пользователя, Страница: 16 / 30

3-2
Table 3−2. Jumper Settings
Jumper Settings
Reference Designator Description
1−2 2−3
Set A[2..0] = 0x1 to generate RD pulse Installed
†
Not installed
W1
Set A[2..0] = 0x2 to generate RD pulse Not installed Installed
Set A[2..0] = 0x3 to generate
CONVST
pulse Installed
†
Not installed
W2
Set A[2..0] = 0x4 to generate
CONVST
pulse Not installed Installed
Apply BUSY to P3 pin 19 Not installed Installed
†
W3
Apply inverted BUSY to P3 pin 19 Installed Not installed
†
Factory-set condition
The data bus is available at connector P3; see Table 3−3 for pinout
information.
Table 3−3. Data Bus Connector P3
Connector.Pin Signal Description
P3.1 D0 Buffered Data Bit 0 (LSB)
P3.3 D1 Buffered Data Bit 1
P3.5 D2 Buffered Data Bit 2
P3.7 D3 Buffered Data Bit 3
P3.9 D4 Buffered Data Bit 4
P3.11 D5 Buffered Data Bit 5
P3.13 D6 Buffered Data Bit 6
P3.15 D7 Buffered Data Bit 7
P3.17 D8 Buffered Data Bit 8
P3.19 D9 Buffered Data Bit 9
P3.21 D10 Buffered Data Bit 10
P3.23 D11 Buffered Data Bit 11
P3.25 D12 Buffered Data Bit 12
P3.27 D13 Buffered Data Bit 13
P3.29 D14 Buffered Data Bit 14
P3.31 D15 Buffered Data Bit 15
P3.33 D16 Buffered Data Bit 16
P3.35 D17 Buffered Data Bit 17 (MSB)
Note: All even-numbered pins of P3 are tied to DGND.
This evaluation module provides direct access to all the analog-to-digital
converter control signals via connector J4; see Table 3−4.
Table 3−4. Pinout for Converter Control Connector J4
Connector.Pin Signal Description
J4.1 CS Chip Select pin. Active low
J4.3 RD Read pin. Active low
J4.5 CONVST Convert start pin. Active low
J4.7 BYTE Byte select input. Used for 8-bit bus reading.
J4.9 BUS 18/16 Bus size select input. Used for selecting 18-bit or 16-bit wide bus transfer.
J4.11 BUSY Converter status output. High when a conversion is in progress.
Note: All even-numbered pins of P4 are tied to DGND.