PC87109VBE Nuvoton Technology Corporation of America, PC87109VBE Datasheet - Page 39

• Manufacturer Part Number: PC87109VBE
• Description: IC CONTROLLER ADV UART 32-LQFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of PC87109VBE

• Features: Transmit Deferral
• Number Of Channels: 2, DUART
• Fifo's: 16 Byte
• Voltage - Supply: 5V
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• Mounting Type: Surface Mount
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *PC87109VBE

3.8.2 IRTXMC - Infrared Transmitter Modulator Control Register
Used to select the modulation sub-carrier parameters for CEIR and Sharp-IR modes. For Sharp-IR, only the sub-carrier pulse
width is controlled by this register, the sub-carrier frequency is fixed at 500 kHz.
After reset, the content of this register is 69h, selecting a sub-carrier frequency of 36 kHz and a pulse width of 7 s for CEIR, or
a pulse width of 0.8 s for Sharp-IR.
DFR [4 - 0]
DFR [4-0]
Bits
Function
Reset State
B4-0
B7-5
00011
01000
01011
DFR [4-0]
00011
00100
00101
00110
00111
01000
01001
01011
01100
01101
01111
10000
10010
10011
10101
10111
11010
11011
11101
xxxxx
381.0
436.4
457.7
min.
001
DFR [4-0] - Demodulator Frequency.
These bits determine the subcarrier' center frequency for the CEIR mode.
DBW [2-0] - Demodulator Bandwidth.
These bits determine the demodulator bandwidth within which the subcarrier signal frequency has to fall in
order for the signal to be accepted.
Used for both Sharp-IR and CEIR modes.
001
480.0
min.
min.
28.6
29.3
30.1
31.7
32.6
33.6
34.6
35.7
36.9
38.1
39.4
40.8
42.3
44.0
45.7
47.6
49.7
51.9
54.4
MCPW2
Table 3-14. CEIR Low-Speed Demodulator Frequency Ranges in kHz (RXHSC = 0)
B7
Table 3-15. CEIR High-Speed Demodulator Frequency Ranges in kHz (RXHSC=1)
001
0
421.1
480.0
505.3
max.
533.3
Max.
max.
31.6
32.4
33.2
35.1
36.0
37.1
38.3
39.5
40.7
42.1
43.6
45.1
46.8
48.6
50.5
52.6
54.9
57.4
60.1
Figure 3-24. Infrared Transmitter Modulator Control Register
MCPW1
Table 3-16. Sharp-IR Demodulator Frequency Ranges in kHz
363.6
417.4
436.4
010
min.
457.1
010
min.
B6
min.
1
27.3
28.0
28.7
30.3
31.1
32.0
33.0
34.1
35.2
36.4
37.6
39.0
40.4
42.0
43.6
45.5
47.4
49.5
51.9
010
444.4
505.3
533.3
max.
564.7
max.
max.
33.3
34.2
35.1
37.0
38.1
39.2
40.4
41.7
43.0
44.4
45.9
47.6
49.4
51.3
53.3
55.6
57.9
60.6
63.4
MCFW0
B5
1
347.8
400.0
417.4
436.4
011
min.
min.
011
min.
26.1
26.7
27.4
29.0
29.8
30.7
31.6
32.6
33.7
34.8
36.0
37.3
38.6
40.1
41.7
43.5
45.3
47.4
49.7
011
DBW [2-0] bits
DBW [2-0] bits
600.0
470.6
533.3
564.7
MCFR4
max.
max.
39
DBW [2-0] bits
B4
max.
35.3
36.2
37.1
39.2
40.3
41.5
42.8
44.1
45.5
47.1
48.6
50.4
52.3
54.3
56.5
58.8
61.4
64.1
67.2
0
417.4
min.
333.3
384.0
400.0
min.
100
100
min.
25.0
25.6
26.3
27.8
28.5
29.4
30.3
31.3
32.3
33.3
34.5
35.7
37.0
38.5
40.0
41.7
43.5
45.4
47.6
MCFR3
100
B3
1
640.0
max.
500.0
564.7
600.0
max.
max.
37.5
38.4
39.4
41.7
42.8
44.1
45.4
46.9
48.4
50.0
51.7
53.6
55.6
57.7
60.0
62.5
65.2
68.1
71.4
400.0
min.
MCFR2
320.0
369.2
384.0
101
101
min.
B2
min.
24.0
24.6
25.2
26.7
27.4
28.2
29.1
30.0
31.0
32.0
33.1
34.3
35.6
36.9
38.4
40.0
41.7
43.6
45.7
0
101
685.6
max.
533.3
600.0
640.0
max.
max.
40.0
41.0
42.1
44.4
45.7
47.0
48.5
50.0
51.6
53.3
55.1
57.1
59.3
61.5
64.0
66.7
69.5
72.7
76.1
MCFR1
B1
384.0
0
min.
307.7
355.6
369.9
110
min.
110
www.national.com
min.
23.1
23.7
24.3
25.6
26.3
27.1
28.0
28.8
29.8
30.8
31.8
33.0
34.2
35.5
36.9
38.5
40.1
41.9
43.9
110
738.5
max.
MCFR0
571.4
640.0
685.6
max.
B0
max.
42.9
43.9
45.1
47.6
48.9
50.4
51.9
53.6
55.3
57.1
59.1
61.2
63.5
65.9
68.6
71.4
74.5
77.9
81.6
1