ADUC847 Analog Devices, ADUC847 Datasheet - Page 84

• Manufacturer Part Number: ADUC847
• Description: Precision Analog Microcontroller: 12MIPS 8052 Flash MCU + 10-Ch 24-Bit ADC + 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC847

• Mcu Core: 8052
• Mcu Speed (mips): 12
• Sram (bytes): 2304Bytes
• Gpio Pins: 34
• Adc # Channels: 10
• Other: PWM

ADuC845/ADuC847/ADuC848
T3FD—Timer 3 Fractional Divider Register
See Table 57 for values.
SFR Address:
Power-On Default:
Bit Addressable:
Table 56. T3FD SFR Bit Designations
Bit No.
7
6
5
4
3
2
1
0
Table 57. Common Baud Rates Using Timer 3 with a 12.58 MHz PLL Clock
Ideal Baud
230400
115200
115200
57600
57600
57600
38400
38400
38400
38400
19200
19200
19200
19200
19200
9600
9600
9600
9600
9600
9600
Name
----
----
T3FD.5
T3FD.4
T3FD.3
T3FD.2
T3FD.1
T3FD.0
9DH
00H
No
CD
0
0
1
0
1
2
0
1
2
3
0
1
2
3
4
0
1
2
3
4
5
Description
Not Implemented. Write Don’t Care.
Not Implemented. Write Don’t Care.
Timer 3 Fractional Divider Bit 5.
Timer 3 Fractional Divider Bit 4.
Timer 3 Fractional Divider Bit 3.
Timer 3 Fractional Divider Bit 2.
Timer 3 Fractional Divider Bit 1.
Timer 3 Fractional Divider Bit 0.
DIV
1
2
1
3
2
1
4
3
2
1
5
4
3
2
1
6
5
4
3
2
1
Rev. B | Page 84 of 108
T3CON
81H
82H
81H
83H
82H
81H
84H
83H
82H
81H
85H
84H
83H
82H
81H
86H
85H
84H
83H
82H
81H
T3FD
2DH
2DH
2DH
2DH
2DH
2DH
12H
12H
12H
12H
12H
12H
12H
12H
12H
12H
12H
12H
12H
12H
12H
% Error
0.18
0.18
0.18
0.18
0.18
0.18
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12