Z8FS040 datasheet(12/56 Pages) ZILOG

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ZMOTION

TM Detection and Control Family

Product Specification

PS028506-1110

PRELIMINARY

Table 3 - Signal Descriptions (continued…)

Comparator

CINP/CINN

Comparator Inputs. These signals are the positive and negative inputs to

the comparator.

COUT

Comparator Output.

Analog

ANA[7:0]

Analog Port. These signals are used as inputs to the analog-to-digital

converter (ADC).

VREF

I/O

Analog-to-digital converter reference voltage input, or buffered output for

internal reference.

Oscillators

XIN

External Crystal Input. This is the input pin to the crystal oscillator. A

crystal can be connected between it and the XOUT pin to form the

oscillator. In addition, this pin is used with external RC networks or

external clock drivers to provide the system clock.

XOUT

External Crystal Output. This pin is the output of the crystal oscillator. A

crystal can be connected between it and the XIN pin to form the oscillator.

Clock Input

CLKIN

Clock Input Signal. This pin may be used to input a TTL-level signal to be

used as the system clock.

LED Drivers

LED

Direct LED drive capability. All port C pins have the capability to drive an

LED without any other external components. These pins have

programmable drive strengths set by the GPIO block.

On-Chip Debugger

DBG

Caution:

I/O

Debug. This signal is the control and data input and output to and from

the On-Chip Debugger.

The DBG pin is open-drain and requires a pull-up

resistor to ensure proper operation.

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