Renesas M3A-7512SA User manual

Regarding the change of names mentioned in the document, such as Mitsubishi
Electric and Mitsubishi XX, to Renesas Technology Corp.
The semiconductor operations of Hitachi and Mitsubishi Electric were transferred to Renesas
Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog
and discrete devices, and memory chips other than DRAMs (flash memory, SRAMs etc.)
Accordingly, although Mitsubishi Electric, Mitsubishi Electric Corporation, Mitsubishi
Semiconductors, and other Mitsubishi brand names are mentioned in the document, these names
have in fact all been changed to Renesas Technology Corp. Thank you for your understanding.
Except for our corporate trademark, logo and corporate statement, no changes whatsoever have been
made to the contents of the document, and these changes do not constitute any alteration to the
contents of the document itself.
Note : Mitsubishi Electric will continue the business operations of high frequency & optical devices
and power devices.
Renesas Technology Corp.
Customer Support Dept.
April 1, 2003
To all our customers

MSD-7512-U
7536/7534 Group HID Class Keyboard
Evaluation Board
M3A-7512SA
Instruction Manual
Ver.1.00 ‘01-4-24
MITSUBISHI ELECTRIC CORP.
MITSUBISHI ELECTRIC SEMICONDUCTOR
APPLICATION ENGINEERING CORP.

Keep safety first in your circuit designs!
* Mitsubishi Electric Corporation puts the maximum effort into making semiconductor
products better and more reliable, but there is always the possibility that trouble
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or property damage. Remember to give due consideration to safety when making
your circuit designs, with appropriate measures such as (i) placement of substitutive,
auxiliary circuits, (ii) use of non-flammable material or (iii) prevention against any
malfunction or mishap.
Notes regarding these materials
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Revision History M3A-7512SA Instruction Manual
Ver.No. Data Changes
1.0 2001.4.24 The First Revision

// Contents //
// Overview _________________________________________________________________1
// Board Explanation _________________________________________________________1
// Power Supply _____________________________________________________________2
// Reset Circuit ______________________________________________________________2
// Bypass Condenser _________________________________________________________3
// Chip Package______________________________________________________________4
// About Keyboard ___________________________________________________________5
// Jumper Switch __________________________________________________________6
// Keyboard Signal Test Pins ________________________________________________8
// Keyboard Connector______________________________________________________9
// System Diagram ________________________________________________________10
// Non-Connected Pins_______________________________________________________10
// Appendix ________________________________________________________________11
// Diagram _______________________________________________________________11
// Part Table _____________________________________________________________12

Board M3A-7512SA
- 1 -
// Overview
* USB function of MITSUBISHI Low Speed USB Microcomputer 7536 Group/7534
Group can be evaluated on the Board. (for 42 pin SDIP package)
* A keyboard can be attached to 40 pin connector for enumerating HID Low Speed
Keyboard.
* A PS/2 Mouse can be attached to the PS/2 Port for enumerating HID Low Speed PS/2
Mouse Keyboard.
* 7536 Group/7534 Group Keyboard Standard Firmware can be evaluated.
// Board Explanation
Reset Switch
Power-on Reset
Circuit
USB Port
Connector for
42 Pin SDIP
Foot Pattern
Keyboard Signal Test Pins Keyboard LED’s
PS/2 Port
Jumper Switch
Oscillation Circuit
for 42 Pin SSOP

Board M3A-7512SA
- 2 -
// Power Supply
* Supply power to the USB Port with a USB cable which is attached to a PC.
* Insert 1.5kΩresistance between USB D- pull-up power Pin (USBVREFOUT) and D- line.
* Insert 0.1uF ceramic/polar condenser between 7536 Group USB D- Pull-up power Pin
(USBVREFOUT) and Vss . Insert 0.22uF ceramic/polar condenser between 75347532
Group USB D- Pull-up power Pin (USBVREFOUT) and Vss. (Refer to the Users’ Manuals
for the reasons.)
// Reset Circuit
* Build Power On Reset Circuit. (RESET IC’s do not match the pattern.)
USB Port
USB D- Pull-up Power
Pin Resistance
USB D- Pull-up Power
Pin Condenser
Reset Switch
P
owe
r-
o
n R
ese
t
C
ir
c
uit

Board M3A-7512SA
- 3 -
// Oscillation Circuit
* Build Oscillation Circuit on the foot pattern.
// Bypass Condenser
* Insert a bypass condenser between Vcc and Vss on the foot pattern.
* 0.1uF ceramic for 7536 Group. 1.0uF ceramic/polar for 7534 Group.
Oscillation Circuit for
42 Pin SDIP
42 Pin SDIP
Foot Pattern
Bypass Condenser
for 42 Pin SDIP

Board M3A-7512SA
- 4 -
// Chip Package
* Use a 1.778mm pitch 42 pin SDIP (42P4B) IC socket. For evaluating with a debugger,
use M37536RSS. Or M37534RSS.
42 pin SDIP
foot pattern

Board M3A-7512SA
- 5 -
// About Keyboard
* Switch jumpers according to scan/return line assignment to ports.
Keyboard
Connector Scroll LED
Jumper Switches
Keyboard Signal
Test pins
Caps LED Num LED

Board M3A-7512SA
- 6 -
// Jumper Switch
*S1: Scan-line/Return-line Select switch
-23 Return line
-12 Scan line
-23 Return-line -12 Scan-line
1 2 3 1 2 3
*S4: Scan-line/LED Select switch
-23 LED
-12 Scan line
-23 LED -12 Scan-line
1 2 3 1 2 3
*S5: Scan-line/PS/2 signal-line select switch
-23 Scan-line
-12 PS/2 signal-line
-23 Scan-line -12 PS/2 signal-line
1 2 3 1 2 3
*S6: Scan-line/PS2 signal-line select switch
-23 Scan-line
-12 PS/2 signal-line
-23 Scan-line -12 PS/2 signal-line
1 2 3 1 2 3

Board M3A-7512SA
- 7 -
*S7: PS/2 signal-line/LED select switch
-23 LED-line
-12 PS/2 signal-line
-23 LED -12 PS/2 signal-line
1 2 3 1 2 3
*S8: Scan-line/Return-line select switch
-23 Scan-line
-12 Return-line
-23 Scan-line -12 Return-line
1 2 3 1 2 3

Board M3A-7512SA
- 8 -
// Keyboard Signal Test Pins
Return6: Return-line 6
Return5: Return-line 5
Return4: Return-line 4
Return3: Return-line 3
Return2: Return-line 2
Return1: Return-line 1
Return0: Return-line 0
CLK: PS/2CLK/Scan-line 20/Return-line 9
Data: PS/2DATA/Scan-line 19
PS/2VCC: PS/2VCC/Scan-line 18
Scan17: Scan-line 17
Scan16: Scan-line 16
Scan15: Scan-line 15/ LED(Scroll)
LED1: LED(Caps)
LED0: LED(Num)/PS/2_LED Drive
Return7: Return-line 7 Scan0: Scan-line 0 Scan1: Scan-line 1 Scan2: Scan-line 2/Return-line 8 Scan3: Scan-line 3 Scan4: Scan-line 4
Scan5: Scan-line 5
Scan6: Scan-line 6
Scan7: Scan-line 7
Scan8: Scan-line 8
Scan9: Scan-line 9
Scan10: Scan-line 10
Scan11: Scan-line 11
Scan12: Scan-line 12
Scan13: Scan-line 13
Scan14: Scan-line 14
Reset: Reset

Board M3A-7512SA
- 9 -
// Keyboard Connector
Return-line 0 (P00)
Return-line 2 (P02)
Return-line 4 (P04)
Return-line 6 (P06)
Return-line 8 (P37)
Scan-line 0 (P12)
Scan-line 2 (P14)
Scan-line 4 (P16)
Scan-line 6 (P21)
Scan-line 8 (P23)
Scan-line 10 (P25)
Scan-line 12 (P27)
Scan-line 14 (P41)
Scan-line 16 (P33)
Scan-line 18 (P35)
Scan-line 20 (P37)
LED(Num) (P30)
LED(Scroll) (P32)
N.C.
GND
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Return-line 1 (P01)
Return-line 3 (P03)
Return-line 5 (P05)
Return-line 7 (P07)
Return-line 9 (P14)
Scan-line 1 (P13)
Scan-line 3 (P15)
Scan-line 5 (P20)
Scan-line 7 (P22)
Scan-line 9 (P24)
Scan-line 11 (P26)
Scan-line 13 (P40)
Scan-line 15 (P32)
Scan-line 17 (P34)
Scan-line 19 (P36)
N.C.
LED(Caps) (P31)
N.C.
VCC
GND
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

Board M3A-7512SA
- 10 -
// System Diagram
16
Key Matrix
8
LED Output
P00-P07
P12-P16
P20-P27
P33-P36
USBVREFOUT
P10/D-
P11/D+
P30-P32
3
1.5kΩ
USB Data Input/Output
7536 Group/7534 Group
// Non-Connected Pins
* Non-Connected Pin ports for attached keyboard scan-lines/return-lines should be set
by software.

Board M3A-7512SA
- 11 -
// Appendix
// Diagram
* 7536 Group 42 Pin SDIP package Diagram is shown below.

Board M3A-7512SA
- 12 -
// Part Table
* 7536 Group 42 Pin SDIP Package Part Table is shown below.
* Check part numbers in the diagram and on the silk.
*Alternate parts can be assembled.
Part No. Quantity Part Characteristics
CN1 1 40 pin connector
CN2 1 USB connector
CN2 1 PS/2 connector
C1 1 Capacitor 10u(pol)
C2 1 2 pin socket (0.1uF/0.22uF)
C3 1 Capacitor 1u(pol)
C4,C5 2 Capacitor 30pF
C6 1 2 pin socket (0.1uF/0.22uF)
D1 1 Diode
D2,3,4 3 LED
Q1,Q2 2 Transistor
R1,5 2 Resistor 10kΩ
R2 1 Resistor 1.5kΩ
R3 1 Resistor 100kΩ
R4 1 Resistor 4.7kΩ
R6 1 Resistor 820Ω
R7,8,9 3 Resistor 470Ω
S2 1 Reset Switch
S1,3,4,5,6,7,8 7 Jumper
U1 1 IC socket
Y1 1 Oscillator 6MHz
TP 18 Test pins

All rights reserved; no part of this publication may be reproduced or transmitted by any means, electronic,
mechanical, photocopying or otherwise, without the prior permission of the publisher.
Mitsubishi 8-bit USB Microcomputer
7534/7536 Group HID Class Keyboard Evaluation Board
M3A-7512SA Instruction Manual
Ver 1.00 ’01-04-24
Copyright ©2002 Mitsubishi Electric Corporation
Copyright ©2002 Mitsubishi Electric Semiconductor Application Engineering Corporation