DESCRIPTION
The CM2221and CM2222 are remote control transmitters utilizing CMOS Technology
specially designed for use on infrared remote control applications.
They are pin-to-pin compatible with NEC
PD6121 and
PD6122 respectively.
CM2221 is packaged in 20 pins SO and capable of controlling 32 functions and 3 double
keys. CM2222, on the other hand, is housed in 24 pins SO and capable of controlling 64
function keys and 3 double keys. CM2221/2 may be paired with 8112 to construct a
powerful remote control system.
FEATURES
l
CMOS Technology
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Low Power Consumption (VDD=2.0 ~ 5.5 V )
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Pin-to-Pin Compatible with
PD6121/
PD6122
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Using SEL pin, CM2221 can support 64+6 function codes
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Using SEL pin, CM2222 can support 128+6 function codes
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Customer Code can be selected (please contact Ceramate for details)
Applications
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Audio Equipment
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Television (TV)
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Cable TV Tuner
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Video Cassette Recorder (VCR)
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Cassette Deck
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Air Conditioner
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Video Compact Disk (VCD)
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DVD ROM/Player
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Moniputer /Multi-Media Personal Computer System
CM2221/2
Infrared Remote Control Transmitter
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD., LUCHU, TAOYUAN, TAIWAN,
Email: server@ceramate.com.tw
Tel:886-3-3214525
Http: www.ceramate.com.tw
Fax:886-3-3521052
Page
1 of 14
Rev 1.3 Nov. 4, 2002
PIN CONFIGURATION
ORDER INFORMATION
Valid Part Number
Package
CM2221-001
20 Pins, SO
CM2222-001
24 Pins, SO
CM2221-002
20 Pins, SO
CM2222-002
24 Pins, SO
CM2221-00X CM2222-00X
Version Number:(001,002) Version Number:(001,002)
Product Number Product Number
CERAMATE Prefix CERAMATE Prefix
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
KI0
KI1
KI2
KI3
REM
VDD
SEL
OSCO
OSCI
VSS
CCS
KI/O0
KI/O1
KI/O2
KI/O3
KI/O4
KI/O5
KI/O6
KI/O7
LMP
CM2221
1 24
2 23
3 22
4 21
5 20
6 19
7 18
8 17
9 16
10 15
11 14
12 13
KI2
KI3
KI4
KI5
KI6
KI7
REM
VDD
SEL
OSCO
OSCI
VSS
KI1
KI0
CCS
KI/O0
KI/O1
KI/O2
KI/O3
KI/O4
KI/O5
KI/O6
KI/O7
LMP
CM2222
CM2221/2
Infrared Remote Control Transmitter
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD., LUCHU, TAOYUAN, TAIWAN,
Email: server@ceramate.com.tw
Tel:886-3-3214525
Http: www.ceramate.com.tw
Fax:886-3-3521052
Page
2 of 14
Rev 1.3 Nov. 4, 2002
Functional Description
Keyboard scan
CM2221 and CM2222 Stay in the stand-by state , the oscillator is OFF and the stand-by
current < 1uA
The CM2221 consists of 32 function keys and CM2222 consists of 64
function keys
The keyboard form of the CM2221 & CM2222 are as shown
u
The CM2221 keyboard form :
K11
K12
K13
K14
K15
K16
K21
K22
K23
K24
K25
K26
R1
R2
C1
C2
C3
C4
C5
C6
K17
K18
K27
K28
C7
C8
K31
K32
K33
K34
K35
K36
K41
K42
K43
K44
K45
K46
R3
R4
K37
K38
K47
K48
u
The CM2222 keyboard form :
K11
K12
K13
K14
K15
K16
K21
K22
K23
K24
K25
K26
R1
R2
C1
C2
C3
C4
C5
C6
K17
K18
K27
K28
C7
C8
K31
K32
K33
K34
K35
K36
K41
K42
K43
K44
K45
K46
R3
R4
K37
K38
K47
K48
K51
K52
K53
K54
K55
K56
K61
K62
K63
K64
K65
K66
R5
R6
K57
K58
K67
K68
K71
K72
K73
K74
K75
K76
K81
K82
K83
K84
K85
K86
R7
R8
K77
K78
K87
K88
Transmission codes
When one of the keys ( 32 keys or 64 keys ) is triggered over 36 ms
the oscillator is
enable and the IC is activated
If the key is pressed and held for 108 ms or less
the 108
ms transmission codes of the CM2221 & CM2222 consist of a 9 ms header code,a 4.5 ms off
code
16-bits custom codes ( 18 ms
36 ms )
8-bits data codes ( 9 ms
18 ms ) and
the inverse codes of the 8-bits data codes ( 18 ms
9 ms )
After the pressed key is held for 108 ms
if the key is still held down
the transmission
codes turn out to be a composition of header code ( 9 ms ) and off code ( 2.5 ms ) only
CM2221/2
Infrared Remote Control Transmitter
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD., LUCHU, TAOYUAN, TAIWAN,
Email: server@ceramate.com.tw
Tel:886-3-3214525
Http: www.ceramate.com.tw
Fax:886-3-3521052
Page
3 of 14
Rev 1.3 Nov. 4, 2002
The following is an illustration of the transmission codes:
Key
input
36 ms min
4.5 ms
9 ms
45 ms - 63 ms
custom & data code
108 ms
9 ms
108 ms
Key Enables
2.25 ms
0.56 ms
9 ms
0.56 ms
2.25 ms
38 KHz 1/3 duty carrier
X2
DOUT
Fosc = 455 KHz
Output format for the DOUT
8.77 us
38 KHz
Carrier
26.3 us
38 KHz carrier form
0.56 ms
data period ( 1.12 ms )
bit-0
0.56 ms
data period ( 2.24 ms )
bit-1
38 KHz carrier
The transmission codes employ the PPM ( Pulse Position Modulation ) method to represent
their two logic states by bit-0 ( 1.12 ms ) and bit-1 ( 2.24 ms ) :
The output code carrier ( 38 KHz ) of the DOUT pin :
bit-0 and bit-1 Logic states form
CM2221/2
Infrared Remote Control Transmitter
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD., LUCHU, TAOYUAN, TAIWAN,
Email: server@ceramate.com.tw
Tel:886-3-3214525
Http: www.ceramate.com.tw
Fax:886-3-3521052
Page
4 of 14
Rev 1.3 Nov. 4, 2002
The value of ROM1 (8 bits) & ROM2 (8 bits) are both "
00H
"
and it is decided by
one mask layer
The A0 - - A7 are set by logical
OR
between the switches (S0 - - S7)
and ROM1
The A8 - - A15 equal some bits be inverted of A0 - - A7
the inversion are
decided by logical
OR
between the switches (S8 - - S15) and ROM2
For example :
CM2221-1 & CM2222-1
S8
S0
C1
AIN
1 : Switch close
S9
S1
C2
S10
S2
C3
S11
S3
C4
S12
S4
C5
S13
S5
C6
S14
S6
C7
S15
S7
C8
0 : Switch open
1N4148
200K
1N4148
200K
1N4148
200K
1N4148
200K
1N4148
200K
1N4148
200K
1N4148
200K
1N4148
200K
S0 - - S7
S8 - - S15
External switch S0 - - - S15 :
0 1 0 1 0 1 0 0
1 1 0 0 0 1 0 0
ROM1
ROM2
On chip ROM1
ROM2 :
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
(S0 - - S7)
OR
ROM1
A0 - - A7 :
0 1 0 1 0 1 0 0
(S8 - - S15)
OR
ROM2
A8' - - A15' :
1 1 0 0 0 1 0 0
x x
x
1 : non-inversion
A0 A1 - - - A5 - -
0 : inversion
- - A2B A3B A4B - A6B A7B
A8 - - A15 :
0 1 1 0 1 1 1 1
A0 - - A7
A8 - - A15
Custom codes A0 - - - A15 :
0 1 0 1 0 1 0 0
0 1 1 0 1 1 1 1
u
The CM2221-2 & CM2222-2 :
In this case
the 28 bits on chip MASK ROM ( ROM2 & ROM3-0
ROM3-1
ROM3-
2 and
ROM3-3 ) is available and it is decided by one mask layer
The
value of ROM2
is "
00H
" and the value of ROM3 is show below " ROM3 option table "
The A0 - - A2
are set by S0 - - S7 ( " A0 - - A2 option table " )
The A3 - - A7 are set by S14 &
S15( " ROM3 option table " )
The A8 - - A15 equal some bits be inverted of A0 - - A7
and the inversion are decided by logical
OR
between the switches S8 - - S13 and
ROM2
u
The CM2221-1 & CM2222-1 :
To set the custom codes ( A0 - - - A15 )
The algorithm rule of the custom codes ( A0 - - - A15 ) can be selected by mask option
and the user can choose the CM2221-1 & CM2222-1 or the CM2221-2 & CM2222-2
CM2221/2
Infrared Remote Control Transmitter
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD., LUCHU, TAOYUAN, TAIWAN,
Email: server@ceramate.com.tw
Tel:886-3-3214525
Http: www.ceramate.com.tw
Fax:886-3-3521052
Page
5 of 14
Rev 1.3 Nov. 4, 2002
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