Intel 8XC196NT User Manual page 11

8XC196NT USER'S MANUAL
CHAPTER 12
MINIMUM HARDWARE CONSIDERATIONS
12.1 MINIMUM CONNECTIONS ......................................................................................... 12-1
12.1.1 Unused Inputs .........................................................................................................12-2
12.1.2 I/O Port Pin Connections ........................................................................................12-2
12.2 APPLYING AND REMOVING POWER ....................................................................... 12-4
12.3 NOISE PROTECTION TIPS ........................................................................................ 12-4
12.4 PROVIDING THE CLOCK ........................................................................................... 12-5
12.4.1 Using the On-chip Oscillator ...................................................................................12-5
12.4.2 Using a Ceramic Resonator Instead of a Crystal Oscillator ....................................12-7
12.4.3 Providing an External Clock Source ........................................................................12-7
12.5 RESETTING THE DEVICE.......................................................................................... 12-8
12.5.1 Generating an External Reset ...............................................................................12-10
12.5.2 Issuing the Reset (RST) Instruction ......................................................................12-12
12.5.3 Issuing an Illegal IDLPD Key Operand .................................................................12-12
12.5.4 Enabling the Watchdog Timer ...............................................................................12-12
12.5.5 Detecting Oscillator Failure ...................................................................................12-12
CHAPTER 13
SPECIAL OPERATING MODES
13.1 SPECIAL OPERATING MODE SIGNALS AND REGISTERS..................................... 13-1
13.2 REDUCING POWER CONSUMPTION ....................................................................... 13-3
13.3 IDLE MODE ................................................................................................................. 13-3
13.4 POWERDOWN MODE ............................................................................................... 13-4
13.4.1 Enabling and Disabling Powerdown Mode ..............................................................13-4
13.4.2 Entering Powerdown Mode .....................................................................................13-5
13.4.3 Exiting Powerdown Mode .......................................................................................13-5
13.4.3.1 Driving the V
13.4.3.2 Generating a Hardware Reset ...........................................................................13-6
13.4.3.3 Asserting the External Interrupt Signal ...............................................................13-6
13.4.3.4 Selecting R
13.5 ONCE MODE............................................................................................................... 13-9
13.5.1 Entering and Exiting ONCE Mode ..........................................................................13-9
13.6 RESERVED TEST MODES......................................................................................... 13-9
CHAPTER 14
INTERFACING WITH EXTERNAL MEMORY
14.1 INTERNAL AND EXTERNAL ADDRESSES ............................................................... 14-1
14.2 EXTERNAL MEMORY INTERFACE SIGNALS........................................................... 14-2
14.3 CHIP CONFIGURATION REGISTERS AND CHIP CONFIGURATION BYTES ......... 14-5
14.4 BUS WIDTH AND MULTIPLEXING........................................................................... 14-10
14.4.1 Timing Requirements for BUSWIDTH ...................................................................14-12
14.4.2 16-bit Bus Timings ................................................................................................14-13
x
Pin Low ......................................................................................13-5
pp
and C ...........................................................................................13-7
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