sm5221-001 SamHop Microelectronics Corp., sm5221-001 Datasheet
sm5221-001
Related parts for sm5221-001
sm5221-001 Summary of contents
Page 1
... AM OP GENERAL DESCRIPTION The SM5221-001/002 is an infrared remote consists of "leader pulse", "16 bit customer code" ...
Page 2
... Key Scan 4 LED Key Scan 3 CODE Key Scan 2 OSCO Key Scan 1 OSCI Key Scan 0 VDD Customer Code VSS Select Input Page 2 SM5221-001/002 32 KEYS ENCODER Function No. Scan Key Input 0 KI0 I 1 With Pull Low Scan Key Input 1 KI1 2 I With Pull Low ...
Page 3
... SEL FUNCTION DESCRIPTION (1) Oscillation The SM5221-001/002 oscillation circuit is designed for use of a 400 kHz or 500 kHz ceramic resonator, but there may be mutual influence between variations in the IC and ceramic resonator resulting in abnormal oscillation. The oscillation circuit starts to operate when a key is depressed. OSCI ...
Page 4
... Data code D7 can be controlled by this pin, allowing 64 kinds of data to be transmitted set to "0" by connecting the SEL pin to VDD, and to "1" by connecting the SEL pin to VSS. As the input of this pin is high-impedance, it must be connected to either VDD or VSS. Ex. f OSC = 455 kHz 108 ms Page 4 SM5221-001/002 32 KEYS ENCODER 108 ms V.2.0 Mar 8,2002 ...
Page 5
... C1' C2' C3' C4' C5' C6' C7 Custom Code' DOUT Output Code Custom Code' Custom Code 8 bits 8 bits 58.5 to 76.5 ms 2.25 ms Bit 1 Page 5 SM5221-001/002 32 KEYS ENCODER Data Code Data Code Data Code Data Code 8 bits 8 bits V.2.0 Mar 8,2002 ...
Page 6
... Carrier Frequency ...... OSC/ KHz C0' C1' C2' C3' C4' C5' C6' C7 Custom Code' B DOUT Output Code Page 6 SM5221-001/002 32 KEYS ENCODER 0.56 ms Data Code Data Code V.2.0 Mar 8,2002 ...
Page 7
... ROM1 and external diode positions. C0, C1, C2: Determined by wiring one of pins KI/O0 thru KI/O7 to CCS pin. Ver thru C7: Determined by internal ROM3 and absence/presence of KI/O6 & KI/O7 external pull-up resistors. * Standard product SM5221-001/002 uses the Ver. I specification Internal ROM is set as follows: ROM 1 Custom code high-order 8 bits Standard product SM5221-002 uses the Ver ...
Page 8
... Custom code' low-order 8 bits Page 8 SM5221-001/002 32 KEYS ENCODER Pull-Up resistor Yes Yes No Yes Yes V.2.0 Mar 8,2002 ...
Page 9
... With Ver. II 0/1 allocation to C2, C1 and C0 of the custom code high-order bits is set as shown in the following table according to the pin connection status of KI/O0 through KI/O7. CCS- C2 KI/O0 0 KI/O1 0 KI/O2 0 KI/O3 0 KI/O4 1 KI/O5 1 KI/O6 1 KI/O7 1 When CODE pin is open ( Page 9 SM5221-001/002 32 KEYS ENCODER V.2.0 Mar 8,2002 ...
Page 10
... Page 10 SM5221-001/002 32 KEYS ENCODER Data Code ...
Page 11
... K22 to 24 Transmission > 126 ms K22 to K24 push No Transmission K22 to K24 No transmission t > 126 ms Page 11 SM5221-001/002 32 KEYS ENCODER 0 0 0/1 D5+K22 to 24 Transmission K21 No Transmission V.2.0 Mar 8,2002 ...
Page 12
... And a user can select ROM3-0, ROM3-1, ROM3-2 or ROM3-3 by the KI/O6 and KI/O7 pull up resistances 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 Page 12 SM5221-001/002 32 KEYS ENCODER ROM 1/0 1/0 1/0 PULL 1/0 1/0 1/0 K/ YES YES V.2.0 Mar 8,2002 SEL ...
Page 13
... Pull up Resistance Symbol VDD VIN -0.3 to VDD Pd Topt -20 to +75 Tstg -40 to +125 Symbol Min. Typ. VDD 2.0 fosc 400 455 VIN 0 Rup 160 200 Page 13 SM5221-001/002 32 KEYS ENCODER Value Unit 6 250 mW ℃ ℃ Max. Unit 3.0 3.3 V 500 KHz VDD V 240 KΩ V.2.0 Mar 8,2002 ...
Page 14
... IH2 V 0 IL2 I 2 IH2 I IL2 I 1.0 OH3 I 35 OL3 1.1 V IH3 I IH3 I -3 IL3 I 5 IH4 I IL4 Page 14 SM5221-001/002 32 KEYS ENCODER Max. Unit Conditions 3 osc = 455 kHz 1 osc = STOP ...
Page 15
... S H Microelectronics Corp APPLICATION CIRCUIT 200pf 455KH Z 200pf LED KI/O7 KI/O6 KI/O5 KI/O4 KI/O3 KI/O2 KI/O1 KI/O0 CODE OSCI OSCO SEL VDD DOUT KI3 Page 15 SM5221-001/002 32 KEYS ENCODER KI2 KI1 KI0 V.2.0 Mar 8,2002 V DD 200K Ω ...
Page 16
...