UPD6P8 NEC [NEC], UPD6P8 Datasheet - Page 31

• Manufacturer Part Number: UPD6P8
• Description: MOS INTEGRATED CIRCUIT 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC [NEC]

output enable flag (t
Output from the REM pin is as follows, in accordance with the values set to bit 9 (CARY) of MOD1 and the timer
Note Input values in the range of 001H to 1FFH to MOD0 and MOD1.
Caution MOD0 and MOD1 must be set while the REM pin is low level (t
MOD1
C7H
FFH
01H
07H
13H
27H
41H
41H
45H
45H
45H
47H
48H
69H
77H
MOD1 Bit 9 (CARY)
Setting Value
—
—
0
1
9
), and the value of the timer block’s 9-bit down counter (t
MOD0
0BH
8BH
8CH
D5H
C7H
FFH
01H
13H
27H
41H
85H
89H
91H
94H
77H
Table 5-3. Example of Carrier Frequency Settings (f
Carrier signal
Timer Output Enable Flag
(Timer Block t
t
9.125
13.25
H
0.25
8.25
8.25
8.75
8.75
8.75
15.0
25.0
32.0
1.0
2.5
5.0
9.0
( s)
Table 5-2. REM Pin Output
—
0
1
Data Sheet U17848EJ3V0DS
9
t
H
)
T
17.625
18.625
t
16.75
17.25
18.25
26.75
t
L
0.25
8.25
17.5
15.0
25.0
32.0
L
1.5
2.5
5.0
( s)
(Timer Block t
9-Bit Down Counter
Other than 0
0
26.375
T ( s)
26.25
27.25
27.75
16.5
26.0
40.0
30.0
50.0
64.0
0.5
2.5
5.0
10
25
0
to t
8
)
X
0
= 4 MHz)
PD6P8, 6P8A, 6P8B
to t
9
= 0 or t
8
).
f
C
2,000
38.10
Carrier output
High-level output
Low-level output
60.6
38.5
37.9
36.7
36.0
33.3
15.6
400
200
100
(kHz)
40
25
20
0
REM Pin
to t
8
= 0).
Note
Duty
1/2
2/5
1/2
1/2
1/2
1/3
1/3
1/3
1/3
1/3
1/3
1/3
1/2
1/2
1/2
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