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EM78P257AP bảng dữ liệu(PDF) 16 Page - ELAN Microelectronics Corp

tên linh kiện EM78P257AP
Giải thích chi tiết về linh kiện  8-BIT MICROCONTROLLER
PDF  91 Pages
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nhà sản xuất  EMC [ELAN Microelectronics Corp]
Trang chủ  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P257AP bảng dữ liệu(HTML) 16 Page - ELAN Microelectronics Corp

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EM78P257
OTP ROM
This specification is subject to change without prior notice.
07.27.2004 (V1.4)
16
11. RC (TCC Prescaler Counter)
TCC prescaler counter can be read and written.
PSR2 PSR1 PSR0
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
TCC Rate
0
0
0
-
-
-
-
-
-
-
V
1:2
0
0
1
-
-
-
-
-
-
V
V
1:4
0
1
0
-
-
-
-
-
V
V
V
1:8
0
1
1
-
-
-
-
V
V
V
V
1:16
1
0
0
-
-
-
V
V
V
V
V
1:32
1
0
1
-
-
V
V
V
V
V
V
1:64
1
1
0
-
V
V
V
V
V
V
V
1:128
1
1
1
V
V
V
V
V
V
V
V
1:256
*V: valid value
12. RD (IR Control Register)
7
6
5
4
3
2
1
0
DP1
DP0
MF1
MF0
IRE
HF
LGP
PWM
• Bit 7: Bit 6 (DP1:DP0) : Ratios of duty and period of modulated frequency
DP1
DP0
Ratio
0
0
1:2(default)
0
1
1:3
1
0
1:4
1
1
-
• Bit 5: Bit 4 ( MF1:MF0 ) : Modulated frequency
MF1
MF0
Fosco
0
0
Fosc/1
0
1
-
1
0
Fosc/4
1
1
Fosc/8
• Bit 3(IRE)
Infrared Remote Enable bit
0: Disable IRE. Disable H/W Modulator Function.
1: Enable IRE. Disable RB (Bit4(TCCBTE) and Bit5(TCCBTS)), and TCCBX acts as a down counter.
Enable H/W Modulator Function. Pin 67 defined as IR OUT.
• Bit 2(HF) High Frequency. When HF = 1; the Low-time part of the generated pulse is modulated with
a frequency Fosco.
• Bit 1(LGP) Long Pulse. When LGP = 1, the contents of the High-time register are ignored. A single
pulse is generated; its pulse is high.
Pulse width = (Contents of Low-time register) x (number of pulse) x (1/Fosc)
If HF = 1, this pulse is modulated with a frequency Fosco (selected by MF1,MF0).
1:2
1
2
1:3
3
1



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