Minimum Connections - Intel 8XC196NT User Manual

MINIMUM HARDWARE CONSIDERATIONS
The 8XC196NT has several basic requirements for operation within a system. This chapter de-
scribes options for providing the basic requirements and discusses other hardware considerations.

12.1 MINIMUM CONNECTIONS

Table 12-1 lists the signals that are required for the device to function and Figure 12-1 shows the
connections for a minimum configuration.
Signal
Type
Name
ANGND GND Analog Ground
ANGND must be connected for A/D converter and port 0 operation. ANGND and
V
RESET# I/O Reset
A level-sensitive reset input to and open-drain system reset output from the micro-
controller. Either a falling edge on RESET# or an internal reset turns on a pull-down
transistor connected to the RESET# pin for 16 state times. In the powerdown and
idle modes, asserting RESET# causes the chip to reset and return to normal
operating mode. The microcontroller resets to FF2080H in internal OTPROM or
F2080H in external memory.
V PWR Digital Supply Voltage
CC
Connect each V
V PWR Programming Voltage
PP
During programming, the V
maximum V
V
50 ns. Use this method to exit powerdown only when using an external clock source
because it enables the internal phase clocks, but not the internal oscillator.
On devices with no internal nonvolatile memory, connect V
V PWR Reference Voltage for the A/D Converter
REF
This pin also supplies operating voltage to both the analog portion of the A/D
converter and the logic used to read port 0.
V GND Digital Circuit Ground
SS
Connect each V
Table 12-1. Minimum Required Signals
should be nominally at the same potential.
SS
pin to the digital supply voltage.
CC
voltage specification can damage the device.
PP
also causes the device to exit powerdown mode when it is driven low for at least
PP
pin to ground through the lowest possible impedance path.
SS
Description
pin is typically at +12.5 V (V
PP
CHAPTER 12
voltage). Exceeding the
PP
to V .
PP CC
12-1