DV-502/503/DVF-3050/3550
9
CIRCUIT DESCRIPTION
Pin No.
Pin Name
I/O
Description
25, 24~16, 8~1
A0~A18
I
Address Inputs
29,31,33,35
DQ0~DQ7
I/O
Data Input/Outputs, Command Inputs
38,40,42,44
30,32,34,36
DQ8~DQ14
I/O
Data Input/Outputs
39,41,43
45
DQ15
I/O
Data Input/Outputs or Address input
26
CE
-
Chip Enable
28
QE
-
Output Enable
11
WE
-
Write Enable
12
RP
-
Reset/Block Temporary Unprotect
15
RY/BY
O
Ready/Busy/Output
47
BYTE
-
Byte/Word Organization
37
VCC
-
Supply Voltage
27,46
VSS
-
Ground
Pin No.
Pin Name
I/O
Description
1,3,5,9
A0 to A5
I
Data Inputs
11,13
2,4,6,8
Q0 to Q5
O
Data Outputs
10,12
7
GND
-
Ground
14
VCC
-
Positive Supply Voltage
Truth Table
A
Q
L
H
H
L
2-6 Flash Memory : M29W800AT(IC401)
2-4 DC Motor Driver : KA8082(ICM21)
Pin No.
Pin Name
I/O
Description
1
GND
-
Ground
2
VO1
O
Output 1
3
VCTL
I
Motor speed control
4
VIN1
I
Input 1
5
VIN2
I
Input 2
6
SVCC
-
Supply voltage (Signal)
7
PVCC
-
Supply voltage (Power)
8
VO2
O
Output 2
Internal Block Diagram
GND
1
8 V02
DRIVER OUT
VO1
2
7 PVCC
PRE DRIVER
VCTL
3
TSD
BIAS
6 SVCC
LOGIC SWITCH
VIN1
4
5 VIN2
2-5 HEX Inverter (Single Stage) : M74HCU04(IC501)
