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M68HC08 Datasheet(PDF) 15 Page - Freescale Semiconductor, Inc

Part # M68HC08
Description  MC68HC908JB16 Technical Data
PDF  332 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

M68HC08 Datasheet(HTML) 15 Page - Freescale Semiconductor, Inc

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Table of Contents
MC68HC908JB16 — Rev. 1.1
Technical Data
Freescale Semiconductor
Table of Contents
15
12.8.1
TxD (Transmit Data). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
12.8.2
RxD (Receive Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
12.9
I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
12.9.1
SCI Control Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
12.9.2
SCI Control Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
12.9.3
SCI Control Register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
12.9.4
SCI Status Register 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
12.9.5
SCI Status Register 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
12.9.6
SCI Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
12.9.7
SCI Baud Rate Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Section 13. Clock Generator Module (CGM)
13.1
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
13.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
13.3
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
13.3.1
Reference Frequency Source (OSCXCLK) . . . . . . . . . . . . 250
13.3.2
Voltage Controlled Oscillator . . . . . . . . . . . . . . . . . . . . . . . 250
13.3.3
Reference Divider. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
13.3.4
VCO Frequency Divider . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
13.3.5
Phase Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
13.3.6
Phase Detector Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
13.3.7
Lock Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
13.4
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
13.4.1
CGM Power Supply Pins (VDDA, VSSA0, VSSA1) . . . . . . . .252
13.4.2
CGM1 Voltage Regulator Out (VREGA0). . . . . . . . . . . . . . .252
13.4.3
CGM2 Voltage Regulator In (VREGA1) . . . . . . . . . . . . . . . .252
13.4.4
External Filter Capacitor Pins (CGMXFC1, CGMXFC2) . . 253
13.4.5
CGM Clock Output Pins (CGMOUT1, CGMOUT2) . . . . . . 253
13.5
CGMXFC External Connections . . . . . . . . . . . . . . . . . . . . . . . 253
13.6
CGMOUT External Connections. . . . . . . . . . . . . . . . . . . . . . . 254
13.7
Calculation of VCO Frequency . . . . . . . . . . . . . . . . . . . . . . . . 254
13.8
Programming the PLL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
13.9
CGM I/O Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255



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