Lucent Technologies MN10285K - Manual (Page 218)

IR Remote Signal Receiver
Block Diagram
MN102H75K/F75K/85K/F85K LSI User Manual Panasonic Semiconductor Development Company
217
Panasonic
8.2 Block Diagram
Fig
ur
e 8
-1 IR
R
e
mot
e
Sig
n
al R
e
cei
ver
B
lo
c
k D
ia
g
ra
m
54
3
2
1
0
MUX
CK
CK
765
4
32
1
0
MUX
CK
MUX
R
CK
4
RMTC: x’007E04’
Frequency division counter
PWM3 (375 kHz, 2.7
s)
Clock supply stops upon overflow
Ts-
R
CK
6-bit counter
(Overflow) counter value
12 MHz, 0.083
s
Sampling
CK
Polarity select
Noise filter
CK
Remote input signal RMIN
Sampling
PWM6
(21.3 s)
PWM8
(85.5 s)
6
6 2
x’00’
(2 LSBs)
RMLD: x’007EAC’
RMIR: x’007EA2’
Q
R S
Reset
CK
CK
Short/long detection
Short Long
6-bit counter overflow
Remote signal edge detection
Reset
RMIS: x’007EA0’
Q
R
D CK
Q
R
D CK
RMTR: x’007EAA’ RMSR: x’007EA8’
8
8-bit data
receive counter
RMCS: x’007EA6’
Loading of 8-bit
received data
Counter value
7 6
765
4
32
1
0
765
4
32
1
0
765
4
32
1
0
7 6 5 4 3 2 1 0
765
4
32
1
0
Data format detection
5-/6-bit leader detection
Edge
detection
circuit
Write
instruction
Interrupt masking
RMCICL: x’00FC76’
RMCIR (bit 4)
HEAMA leader detection