MC44S803EP FREESCALE [Freescale Semiconductor, Inc], MC44S803EP Datasheet - Page 16

• Manufacturer Part Number: MC44S803EP
• Description: Low Power CMOS Broadband Tuner
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Table 17. Reset State Table
LOCAL OSCILLATOR 1 REGISTER (CR-5)
N1 values is from 2 to 4097. The serial data format is shown
Table 19. 12 Bit N Counter Control Bits (N1)
Counter Value Functions (N1)
frequency and the N1 and R1 dividers as described in the
F
Where:
•
LOCAL OSCILLATOR 2 REGISTER (CR-6)
N2 values is from 2 to 32769. The serial data format is shown
MC44S803
16
MSB
MSB
R14
N14
VCO1
R11
N11
0
The N1 divider consists of a 12 bit N counter. The range of
The First LO Frequency is a function of reference
The N2 divider consists of a 15 bit N counter. The range of
0
N Counter
F
oscillator (VCO1)
VCO1
Value
4097
421
equation.
R13
N13
2
*
*
0
R10
N10
: Output frequency of the first voltage controlled
0
R12
N12
1
R9
N9
0
Not In Reset
F
N11
In Reset
R11
N11
VCO1
0
0
1
*
*
State
0
R8
N8
1
= N1 * F
R10
N10
0
N10
0
0
1
*
*
R7
N7
1
R9
N9
0
OSC
N9
N1 Counter
0
0
1
*
*
R6
N6
/ R1
R8
N8
0
0
N2 Counter
N8
R7
N7
0
1
1
R5
N5
*
*
1
1
Figure 14. LO 1 Register Format
Figure 15. LO 2 Register Format
R6
N6
1
N7
RS
R4
N4
0
1
1
*
*
0
1
0
R5
N5
0
N6
R3
N3
0
0
1
0
*
*
R4
N4
1
R2
N2
N5
Table 18. SO Setup Register Table
in Table 19. This N divider is actually an N+2 divider. In other
words, the bits that are programmed into the register are 2
less than what is calculated for the given frequency.
0
•
•
•
•
in Table 20. This N divider is actually an N+2 divider. In other
words, the bits that are programmed into the register are
2 less than what is calculated for the given frequency.
0
1
1
*
*
R3
N3
0
N1: Value of control bits for 15 bit programmable N1
counter. (N1-2 is actually programmed into register)
F
oscillator. (Example: F
R1: Divide ratio of first programmable reference counter.
F
R1. (R1-1 is actually programmed into Reference
Dividers register)
S0
0
1
OSC
REF1
R1
N1
N4
1
0
0
1
*
*
R2
N2
1
: Output frequency of the reference frequency
: Reference Frequency for First LO. F
R0
N0
R1
N1
1
N3
0
0
0
1
*
*
SO Disabled
R0
N0
SO Active
Function
A3
0
0
N2
0
0
1
*
*
OSC
A3
Address Bits
0
A2
1
N1
0
1
1
*
*
Address Bits
= 4.0 MHz)
A2
1
A1
Freescale Semiconductor
0
N0
0
1
1
*
*
A1
1
A0
LSB
1
LSB
A0
Reset State
0
Reset State
REF1
Reset State
Reset State
= F
OSC
/