(3) Custom Code

The DOUT output custom code can be set in any of 65536 ways by means of the diodes

attached to the CODE (Custom Code Select) pin and the KI/O pins and the pull-up resistors

attached to the KI/O pins. When a code other than code 00000000 (no diode connection)

is used.

(4) Custom Code Mask ROM Specification

The custom code can also be set by mask ROM. When the mask ROM specification is used

the custom code can be set without the connection of external diodes and resistors, and by

combining external diodes and resistors with mask ROM it is possible to output a code with

different contents from those set by the mask ROM. When mask ROM specification is used,

(Ver. I) or (Ver. II) can be selected.

* Standard product SM5221-001/002 uses the Ver. I

specification

Internal ROM is set as follows:

Page 7

* Standard product SM5221-002 uses the Ver. II specification.

V.2.0 Mar 8,2002

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

C0 C1 C2 C3 C4 C5 C6 C7

C0 C1 C2 C3 C4 C5 C6 C7

ROM 1

Custom code high-order 8 bits

ROM 2

Custom code' low-order 8 bits

Ver. II

C0, C1, C2:

Determined by wiring one of pins

KI/O0 thru KI/O7 to CCS pin.

C3 thru C7:

Determined by internal ROM3 and

absence/presence of KI/O6 & KI/O7

external pull-up resistors.

Determined by logical OR of internal ROM2

and external pull-up resistor (KI/O0 thru

KI/O5) positions.

Ver. I

Custom Code' Low-Order

8 Bits

Determined by logical OR of internal

ROM1 and external diode positions.

Determined by logical OR of interanl ROM2

and external pull-up resistor positions

Custom Code High-Order

8 Bits

SM5221-001/002

32 KEYS ENCODER

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