7. IR Transmitter RC-5 Coded R763569
7.4 Technical Info
Pin Assignment Micro Contoller
3
1
28
27
26
6
7
8
9
4
18
17
16
15
13
12
11
10
19
20
21
22
23
24
25
14
Pin functions:
VDD
: Power Supply
VSS
: Ground connection
Oscillator (osc1, Osc2
): Use of a 864 kHz Ceramic resonator
with 2 load capacitors of 82pF.
MCLR Reset Input
: to be activated in 2 cases:
- Power On: all memory locations are initialised.
- Awake from sleep: option jumpers are scanned and
memorised, keyboard matrix is scanned, key entries are
processed, and the device goes back to sleep.
RA0/RA1:
RC5 modulated/unmodulated driver outputs:
active=H
Pulse sequence: RC5; with/without 36 kHz Carrier Frequency
respectively.
RA2
: Backlight Sense Input/Driver Output: active=high
Turns on for 5sec when a key is hit. This period is retriggered
when another key is hit. During this period, the PIC doesn't
enter the sleep mode.
If this pin is tied high (through a resistor) before it is driven high
internally, the program assumes that the Remote Control is
connected to a projector by means of the jack connector. In this
case, the modulated RC5 driver output is disabled internally.
RA3
: Laser Driver Output active=high
RB0..RB7
: Keyboard Scan Outputs active=low
RC0..RC7
: Keyboard Sense Inputs (External pull up resistors)
active=low
RC5 modulated Out
RC5 unmodulated Out
Backlight Out/Jack sense In
Laser driver Out
GND
+5V
Keyboard
Scan Outputs
(active=L)
Keyboard
Sense Inputs
(active=L)
PIC
16C55
Row 7
Row 6
Row 5
Row 4
Row 3
Row 2
Row 1
Row 0
Col 7
Col 6
Col 5
Col 4
Col 3
Col 2
Col 1
Col 0
RB 0
RB 1
RB 2
RB 3
RB 4
RB 5
RB 6
RB 7
RC 0
RC 1
RC 2
RC 3
RC 4
RC 5
RC 6
RC 7
RAO
RA1
RA2
RA3
VSS
VDD
TOCK1
MCLR/Vpp
Osc.1 /CLK In
Osc.1 /CLK Out
Image 7-8
Pin assignment micro controller
RC5 Sequences
R C
5
s e
q
u
e n c e s
24,9 ms
114 ms
Command String
Command String
Command String is repeated every 114 ms
2 x S tart
B it
T og gle
B it
0
0
1
0
1
5 x A dd re ss
B its
6 x C om m a nd
B its
1
0
0
0
1
0
Command String
1
1
0
9.
26
u
s
2 7.8 u s
The Burs
t
F
r e
q
u e n c
y
i
s
3 6
k H
z
,
w
i t h
a
3 3
%
d
u
t
y
c
y
c
l
e
The RC-5 Code
In the RC-5 standard a bi-phase coding (Coding: a
rising edge within a time window is equivalent to a "1",
a falling edge represents a "0") is applied. The carrier
frequency is fixed at 36 kHz.
The transmission of a word begins with two start bits,
followed by a toggle bit. The toggle bit changes its
value at each key operation. With this change an
interruption of the transmission link can be
distinguished from a multiple key pressing. The 5
address bits address the device to be controlled, the
command bits contain the information to be transmitted.
Each bit in a data word consists of a burst of 32 pulses
with a repetition rate of 36 kHz. The equivalent times
are shown on the puls diagram.
Image 7-9
RC5 sequences
40
R5976820 SLM R12+ PERFORMER 08/03/2005
Summary of Contents for SLM R12 Plus
Page 1: ...SLM R12 Performer Service Manual R9010170 R9010171 R5976820 00 08 03 2005...
Page 8: ...Table of contents 6 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 12: ...1 Safety 10 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 36: ...5 SLM R12 P Location of the Fans 34 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 56: ...8 Local Keypad LCD Display 54 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 82: ...11 Signal Input Selection R763850 R763851 80 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 90: ...13 Digital Inputs Backplane R763378 88 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 126: ...15 Lamp Power Supply R7633705 124 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 130: ...16 Start Pulse Generator SPG R763512 128 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 168: ...22 Infra Red Receiver Module R763261 166 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 174: ...24 Projector Tilt Switch R764240 172 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 178: ...25 Light Output Sensor R763294 176 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 182: ...26 Lamp Info Module R763295 180 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 258: ...27 Maintenance 256 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 274: ...29 Overview of the Electrical Diagrams 272 R5976820 SLM R12 PERFORMER 08 03 2005...
Page 280: ...Index 278 R5976820 SLM R12 PERFORMER 08 03 2005...