sm5221-001 SamHop Microelectronics Corp., sm5221-001 Datasheet - Page 6

• Manufacturer Part Number: sm5221-001
• Description: Keys Encoder
• Manufacturer: SamHop Microelectronics Corp.

(2) Custom Code Extension
Continous Code
The custom code can be set by the diodes connected to the CODE pin and the KI/O pins.
Connecting the CODE pin and KI/O pins via diodes gives a corresponding custom code of "1",
while no connection gives "0".
The above output codes can be obta
further extend the number of custom codes, 200 k Ω pull up resistors are added to pins KI/O0
through KI/O7,and the bit corresponding to a pin from among the custom code' outputs is
output without being inverted.
Carrier
*: Pull-up resistor added to pins KI/O0 and KI/O2.
C0 and C2 output without inversion (non-inverted bits).
Leader Code
三合微科股份有限公司
S
AM
H
OP
C0
Microelectronics Corp.
C1 C2
Custom Code A
9 ms
8.77
C3
11.25 ms
C4
Carrier Frequency ...... fc = f OSC/12 = 38 KHz
μ
s
C5
C6
26.3 μ s
C7
C0'
DOUT Output Code
C0 C1 C2 C3 C4 C5 C6 C7
9 ms or 0.56 ms
C1' C2' C3' C4' C5' C6' C7' D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
Custom Code' B
Page 6
0.56 ms
Data Code
SM5221-001/002
32 KEYS ENCODER
Data Code
V.2.0 Mar 8,2002