SM5221 SAMHOP [SamHop Microelectronics Corp.], SM5221 Datasheet - Page 12

• Manufacturer Part Number: SM5221
• Description: 32 KEYS ENCODER
• Manufacturer: SAMHOP [SamHop Microelectronics Corp.]

CUSTOMER CODE ROM FORMAT
This LSI has customer code table ROM on the chip. So user can generate customer
codes without external parts.
The customer code ROM format is following.
1) Ver. 1 or Ver. 2 selection ..... Ver. 1 = 01H, Ver. 2 = 02H
2) When a user selects Ver. 1, ROM1 is available for the customer code (C7 to C0) election.
3) ROM2 is available for the customer code' (C7' to C0') selection.
4) When a user selects Ver. 2, ROM3 is available for the customer code (C7 to C3)
Ver.1 or 2 SEL
ROM 3
and KI/O7 pull up resistances.
selection. And a user can select ROM3-0, ROM3-1, ROM3-2 or ROM3-3 by the KI/O6
ROM 1
ROM 2
三合微科股份有限公司
S
AM
0
1
2
3
H
OP
1/0
1/0
1/0
1/0
1/0
1/0
C
0
7
Microelectronics Corp.
1/0
1/0
1/0
1/0
1/0
1/0
C
0
6
1/0
1/0
1/0
1/0
1/0
1/0
C
0
5
1/0
1/0
1/0
1/0
1/0
1/0
C
0
Page 12
4
1/0
1/0
1/0
1/0
1/0
1/0
C
0
3
1/0
1/0
C
0
0
0
0
0
2
1/0
1/0
C
0
0
0
0
0
1
SM5221-001/002
1/0
1/0
C
0
0
0
0
0
0
32 KEYS ENCODER
V.2.0 Mar 8,2002
PULL
K/IO
ROM
YES
YES
NO
NO
6
K/IO
YES
YES
SEL
NO
NO
UP
7