mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 247
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mc68hc908jb16
Manufacturer Part Number
mc68hc908jb16
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908JB16.pdf
(332 pages)
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13.1 Contents
MC68HC908JB16
Freescale Semiconductor
Technical Data — MC68HC908JB16
—
Rev. 1.1
Section 13. Clock Generator Module (CGM)
13.2
13.3
13.3.1
13.3.2
13.3.3
13.3.4
13.3.5
13.3.6
13.3.7
13.4
13.4.1
13.4.2
13.4.3
13.4.4
13.4.5
13.5
13.6
13.7
13.8
13.9
13.9.1
13.9.2
13.9.3
13.9.4
13.9.5
13.9.6
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
CGMOUT External Connections. . . . . . . . . . . . . . . . . . . . . . . 254
CGM I/O Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .249
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
CGMXFC External Connections . . . . . . . . . . . . . . . . . . . . . . . 253
Calculation of VCO Frequency . . . . . . . . . . . . . . . . . . . . . . . . 254
Programming the PLL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Reference Frequency Source (OSCXCLK) . . . . . . . . . . . . 250
Voltage Controlled Oscillator . . . . . . . . . . . . . . . . . . . . . . .250
Reference Divider. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
VCO Frequency Divider . . . . . . . . . . . . . . . . . . . . . . . . . . .251
Phase Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251
Phase Detector Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Lock Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
CGM Power Supply Pins (V
CGM1 Voltage Regulator Out (V
CGM2 Voltage Regulator In (V
External Filter Capacitor Pins (CGMXFC1, CGMXFC2) . . 253
CGM Clock Output Pins (CGMOUT1, CGMOUT2) . . . . . . 253
Bandwidth Control Register . . . . . . . . . . . . . . . . . . . . . . . . 256
VCO Control Register (PVCR) . . . . . . . . . . . . . . . . . . . . . . 256
VCO and Reference Divider Select Registers High . . . . . . 257
VCO Divider Select Register Low . . . . . . . . . . . . . . . . . . . 258
Reference Divider Select Register Low . . . . . . . . . . . . . . . 259
Phase Detector Control Register (PDCR) . . . . . . . . . . . . . 260
Clock Generator Module (CGM)
DDA
REGA1
, V
REGA0
SSA0
) . . . . . . . . . . . . . . . . 252
). . . . . . . . . . . . . . . 252
, V
SSA1
) . . . . . . . . 252
Technical Data
247
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