AC164139 Microchip Technology, AC164139 Datasheet - Page 150

• Manufacturer Part Number: AC164139
• Description: Graphics Display Prototype Board Graphics
• Manufacturer: Microchip Technology

Specifications of AC164139

• Main Purpose: LCD Development
• Embedded: No
• Utilized Ic / Part: PICtail™ Plus Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Primary Attributes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC24FJ256DA210 FAMILY
FIGURE 8-2:
8.5.1
The system clock is generated from the 96 MHz branch
using a configurable postscaler/divider to generate a
range of frequencies for the system clock multiplexer.
The output of the multiplexer is further passed through
a fixed divide-by-3 divider and the final output is used
TABLE 8-2:
DS39969B-page 150
Note 1:
Input from
POSC
Input from
FRC
4 MHz or
8 MHz
These options are not compatible with USB operation. They may be used whenever the PLL branch is
selected and the USB module is disabled.
SYSTEM CLOCK GENERATION
FNOSC<2:0>
SYSTEM CLOCK OPTIONS FOR 96 MHz PLL BLOCK
MCU Clock Division
96 MHz PLL
(CPDIV<1:0>)
96 MHz PLL BLOCK
96 MHz
None (00)
PLL
2 (01)
4 (10)
8 (11)
4 MHz Branch
÷ 5
÷ 4
÷ 3
÷12
÷ 8
÷ 6
÷ 2
÷ 1
96 MHz Branch
PLLDIV<2:0>
111
110
101
100
011
010
001
000
Graphics Clock
Option 1
G1CLKSEL
as the system clock. Figure 8-2 shows this logic in the
system clock sub-block. Since the source is a 96 MHz
signal, the possible system clock frequencies are listed
in Table 8-2. The available system clock options are
always the same, regardless of the setting of the
PLLDIV Configuration bits.
48 MHz Branch
0
1
÷ 2
÷ 8
÷ 4
÷ 2
÷ 1
Graphics Clock
System Clock
USB Clock
CPDIV<1:0>
(Instruction Rate in MIPS)
System Clock Frequency
÷ 2
11
10
01
00
GCLKDIV<6:0>
32 MHz (16)
8 MHz (4)
4 MHz (2)
÷ 64
÷ 63
...
÷ 17.50
÷ 17.00
...
÷ 1.25
÷ 1
16 MHz (8)
Graphics Clock
Option 2
 2010 Microchip Technology Inc.
127
126
...
65
64
...
1
0
÷ 3
.
.
.
(1)
(1)
48 MHz Clock
for USB Module
PLL Output for
System Clock
Clock Output for
Display Interface
(DISPCLK)
Clock Output
for Graphics
Controller
Module (G1CLK)