Z8F0830HH020SG Datasheet, PDF (30/257 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore!^® F0830 Series
Product Specification
12
Table 4. Signal Descriptions (Continued)
Signal
Mnemonic
I/O
Oscillators
X_IN
I
X_OUT
O
Clock Input
CLK_IN
I
LED Drivers
LED
O
On-Chip Debugger
DBG
I/O
Description
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.
External crystal output. This pin is the output of the crystal oscillator. A crys-
tal can be connected between it and the XIN pin to form the oscillator.
Clock input signal. This pin may be used to input a TTL-level signal to be
used as the system clock.
Direct LED drive capability. All Port C pins have the capability to drive an
LED without any other external components. These pins have programma-
ble drive strengths set by the GPIO block.
Debug. This signal is the control and data input and output to and from the
On-Chip Debugger.
Caution: The DBG pin is open-drain and requires an external pull-up resis-
tor to ensure proper operation.
Reset
RESET
I/O RESET. Generates a reset when asserted (driven Low). Also serves as a
reset indicator; the Z8 Encore! forces this pin low when in reset. This pin is
open-drain and features an enabled internal pull-up resistor.
Power Supply
V_DD
I Digital power supply.
AV_DD
I Analog power supply.
V_SS
I Digital ground.
AV_SS
I Analog ground.
Note: The AV_DD and AV_SS signals are available only in the 28-pin packages with ADC. They are replaced by PB6
and PB7 on 28-pin packages without ADC.
PS025113-1212
Signal Descriptions