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CR1 chassis (E)
14
6.
N BOARD
6-1.
GENERAL
The N board comprises only the micro controller inputs and outputs and relevant peripheral applications.
The pin functional description of N board connector (CN1104 on D board) as viewed from the set is substitutable with the D board
circuit description, and here, the micro controller inputs and outputs in the N board are described.
Arrangement on A side of N Board :
CN1001
CN1001
(EEP ROM)
X1001
(X'TAL)
IC1001
(
µ
-COM)
CN1003
N
6-2.
FUNCTION
The micro controller controls mainly five functions:
(1) Power system control by I/O output
(2) Deflection circuit control by I/O output
(3) Control of IC's (OSD IC, Pre-AMP, DSP IC, and DAC IC on L2 board depending on the model) through IIC bus
(4) Direct circuit control by PWM output (G2 only)
(5) DDC communication
The information necessary for the above mentioned controls is taken through the bus, or A/D and I (input port) in the following list, and
processed by the software.
*For the detailed operational description, refer to the Software Specifications.
The following shows the pin assignment of the micro controller (IC1001).
#
Port
I/O
Name
Function
1
P30/RD
I/O
S0 (LSB)
[OUT] H: On, L: Off [IN] H: Normal, L: Short
2
P31/WR
I/O
S1
[OUT] H: On, L: Off [IN] H: Normal, L: Short
3
P32/HWR
I/O
S2
[OUT] H: On, L: Off [IN] H: Normal, L: Short
4
P33/WAIT
I/O
S3
[OUT] H: On, L: Off [IN] H: Normal, L: Short
5
P34
I/O
S4
[OUT] H: On, L: Off [IN] H: Normal, L: Short
6
P35/TA6IN
I/O
S5
[OUT] H: On, L: Off [IN] H: Normal, L: Short
7
P36/TA7OUT
I/O
S6 (MSB)
[OUT] H: On, L: Off [IN] H: Normal, L: Short
8
P37/INT4
I/O
S7
[OUT] H: On, L: Off [IN] H: Normal, L: Short
9
P60/INT0
I
ECO SW
Edge trigger for wake up from stop mode
10
P61/CTS0/INT1
I
VRETRACE
Rising edge trigger for V retrace task
11
P62/SCOUT/INT2
I
MOVE DET
Rising/falling edge detection for move sensor (TBD)
12
P50/AN00
A/D
COM LUM
Luminance sensor, 10bit A/D
13
P51/AN01
A/D
WAKE UP
Trigger for "In power save OSD indicator"
14
P52/AN02
A/D
15
P53/AN03
A/D
16
P54/AN04
A/D
T AMB
Ambient temperature detection, 10bit A/D
17
P55/AN05
A/D
VX
Geo X sensor, 10bit A/D
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