Difference between revisions of "Mesa Electronics 7i76 Step/Direction + I/O Daughter Card"

Latest revision as of 10:59, 20 October 2022

Overview

A 25-pin daughtercard for Mesa FPGA boards. There is are separate sourcing and sinking editions of the board for the field I/O.

Wiring

Page 9 (3 in the PDF) shows the connector locations
Page 10 (4 in the PDF) shows the FPGA side DB-25 pinout
Pages 11-12 (5-6 in the PDF) show the TB2/TB3 step/direction pinouts
Page 12 (6 in the PDF) shows the TB3 encoder input pinout
Page 12 (6 in the PDF) shows the TB3 Smart Serial (RS-422) pinout
Page 17 (11 in the PDF) shows the TB3 Smart Serial (RS-422) pinout with CAT5 wiring scheme
Page 13 (7 in the PDF) shows the TB4 spindle output pinout
Pages 14-15 (8-9 in the PDF) show the TB5 field I/O pinout
Page 16 (10 in the PDF) shows the TB1 field power pinout

Give that all of the FPGA pins are being driven to +5V (high), the 7i76 has the following output levels with respect to digital ground:

TBx Pin	Voltage
STEP/DIRx+	+5V (high)
STEP/DIRx-	0V (low)
RS-422 TX+	0V (low)
RS-422 TX-	+5V (high)
RS-422 RX+	+2.5V (invalid)
RS-422 RX-	+2.5V (invalid)

Dimensions

Page 58 (52 in the PDF) shows a dimensional diagram

Bill of Materials

Name	Marking	Part
U2	[intersil logo] ISL32174 EIBZ W1932AAUS [SOIC-16]	Renesas ISL32174EIBZ
U3	NXP 74HCT14D 46560037 YXD1751F [SOIC-14]	NXP 74HCT14D
U4,U5	[onsemi logo] NCV7608 [SOIC-28]	onsemi NCV7608DWR2G
U6	[TI logo] 89AQCSK G4 26LS32AC [SOIC-16]	Texas Instruments AM26LS32ACD
U7	[Analog Devices logo] 121N0BR #935* 86322 [SOIC-8]	Analog Devices ADUM121N0BRZ
U8	[Microchip logo] dsPIC33FJ16GS 402-I/SO (e3) 1925YJK [SOIC-28]	Microchip DSPIC33FJ16GS402-I/SO
U9	[onsemi logo] ACT 540 PSLJ [TSSOP-20]	onsemi MC74ACT540DTR2G
U12	[onsemi logo] ACT 541 PBLH [TSSOP-20]	onsemi MC74ACT541DTR2G
U10,U11,U14,U15	[TI logo] 8CAG0YM LV4051A G4 [SOIC-16]	Texas Instruments SN74LV4051ADR
U13	[onsemi logo] ACT04 PACL09 [SOIC-14]	onsemi 74ACT04SC
U16	NXP HEF4001BT CKX97806 TXD16224 [SOIC-14]	NXP HEF4001BT
U17	[I logo] S5230 PMIYE [SOIC-8]	onsemi NE5230DR2G
O1,O2	[Toshiba logo] 837 P127	Toshiba TLP127TPRUF
O3	[onsemi logo] H11L1 931Q [DIP-6]	onsemi H11L1
P1	AMP 171 04? 5747846-4	TE 5747846-4
TB1,TB4	8-position 3.5mm pitch pluggable terminal block header	Phoenix Contact 1843664
TB2,TB3,TB5,TB6	24-position 3.5mm pitch pluggable terminal block header
W1-W6	3-position 2.54mm pitch header for jumper	Adam Tech PH1-03-UA

Online Resources

7i76/7i76D Manual

7i76 | Mesa Web Store

7i76D | Mesa Web Store

@@ Line 2: / Line 2: @@
 A 25-pin daughtercard for Mesa FPGA boards. There is are separate sourcing and sinking editions of the board for the field I/O.
+== Wiring ==
+* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=9 Page 9] (3 in the PDF) shows the connector locations
+* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=10 Page 10] (4 in the PDF) shows the FPGA side DB-25 pinout
+* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=11 Pages 11-12] (5-6 in the PDF) show the TB2/TB3 step/direction pinouts
+* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=12 Page 12] (6 in the PDF) shows the TB3 encoder input pinout
+* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=12 Page 12] (6 in the PDF) shows the TB3 Smart Serial (RS-422) pinout
+* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=17 Page 17] (11 in the PDF) shows the TB3 Smart Serial (RS-422) pinout with CAT5 wiring scheme
+* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=13 Page 13] (7 in the PDF) shows the TB4 spindle output pinout
+* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=14 Pages 14-15] (8-9 in the PDF) show the TB5 field I/O pinout
+* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=16 Page 16] (10 in the PDF) shows the TB1 field power pinout
+Give that all of the FPGA pins are being driven to +5V (high), the 7i76 has the following output levels with respect to digital ground:
+{| class="wikitable"
+! TBx Pin
+! Voltage
+|-
+| STEP/DIRx+
+| +5V (high)
+|-
+| STEP/DIRx-
+| 0V (low)
+|-
+| RS-422 TX+
+| 0V (low)
+|-
+| RS-422 TX-
+| +5V (high)
+|-
+| RS-422 RX+
+| +2.5V (invalid)
+|-
+| RS-422 RX-
+| +2.5V (invalid)
+|}
+== Dimensions ==
+* [http://www.mesanet.com/pdf/parallel/7i76man.pdf#page=58 Page 58] (52 in the PDF) shows a dimensional diagram
 == Bill of Materials ==
@@ Line 34: / Line 75: @@
 | [https://www.digikey.com/en/products/detail/microchip-technology/DSPIC33FJ16GS402-I-SO/2059890 Microchip DSPIC33FJ16GS402-I/SO]
 |-
-| U9,U12
+| U9
 | [onsemi logo] ACT 540 PSLJ [TSSOP-20]
 | [https://www.digikey.com/en/products/detail/onsemi/MC74ACT540DTR2G/1479746 onsemi MC74ACT540DTR2G]
+|-
+| U12
+| [onsemi logo] ACT 541 PBLH [TSSOP-20]
+| [https://www.digikey.com/en/products/detail/onsemi/MC74ACT541DTR2G/920949 onsemi MC74ACT541DTR2G]
 |-
 | U10,U11,U14,U15
@@ Line 85: / Line 130: @@
 [http://store.mesanet.com/index.php?route=product/product&product_id=119 7i76 | Mesa Web Store]
-[http://store.mesanet.com/index.php?route=product/product&product_id=322 7i76 | Mesa Web Store]
+[http://store.mesanet.com/index.php?route=product/product&product_id=322 7i76D | Mesa Web Store]