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12.6.1.4
Using Mixed Analog and Digital Inputs ............................................................12-13
12.6.2
Understanding A/D Conversion Errors ..................................................................12-13
CHAPTER 13
13.1
MINIMUM CONNECTIONS ......................................................................................... 13-1
13.1.1
Unused Inputs .........................................................................................................13-2
13.1.2
I/O Port Pin Connections ........................................................................................13-2
13.2
APPLYING AND REMOVING POWER ....................................................................... 13-4
13.3
NOISE PROTECTION TIPS ........................................................................................ 13-4
13.4
THE ON-CHIP OSCILLATOR CIRCUITRY ................................................................. 13-5
13.5
USING AN EXTERNAL CLOCK SOURCE.................................................................. 13-7
13.6
RESETTING THE DEVICE.......................................................................................... 13-8
13.6.1
Generating an External Reset ...............................................................................13-10
13.6.2
Issuing the Reset (RST) Instruction ......................................................................13-12
13.6.3
Issuing an Illegal IDLPD Key Operand .................................................................13-12
13.6.4
Generating Wait States .........................................................................................13-12
13.6.5
Enabling the Watchdog Timer ...............................................................................13-12
CHAPTER 14
14.1
SPECIAL OPERATING MODE SIGNALS AND REGISTERS..................................... 14-1
14.2
REDUCING POWER CONSUMPTION ....................................................................... 14-3
14.3
IDLE MODE ................................................................................................................. 14-4
14.4
POWERDOWN MODE ................................................................................................ 14-5
14.4.1
Enabling and Disabling Powerdown Mode ..............................................................14-5
14.4.2
Entering Powerdown Mode .....................................................................................14-6
14.4.3
Exiting Powerdown Mode .......................................................................................14-6
14.4.3.1
14.4.3.2
Generating a Hardware Reset ...........................................................................14-6
14.4.3.3
Asserting the External Interrupt Signal ...............................................................14-7
14.4.3.4
14.5
ONCE MODE............................................................................................................. 14-10
14.6
RESERVED TEST MODES....................................................................................... 14-11
CHAPTER 15
15.1
EXTERNAL MEMORY INTERFACE SIGNALS AND REGISTERS ............................ 15-1
15.2
CHIP CONFIGURATION REGISTERS AND CHIP CONFIGURATION BYTES ......... 15-5
15.3
BUS WIDTH AND MULTIPLEXING........................................................................... 15-10
15.3.1
Timing Requirements for BUSWIDTH ...................................................................15-13
15.3.2
16-bit Bus Timings ................................................................................................15-14
15.3.3
8-bit Bus Timings ..................................................................................................15-16
...........................................................................................14-8
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