ZGP323L Datasheet, PDF (22/105 Pages) Zilog, Inc. – Programmable input glitch filter for pulse reception

Z8 GP^TM OTP MCU Family
Product Specification
16
Pin Functions
XTAL1 Crystal 1 (Time-Based Input)
This pin connects a parallel-resonant crystal or ceramic resonator to the on-chip
oscillator input. Additionally, an optional external single-phase clock can be coded
to the on-chip oscillator input.
XTAL2 Crystal 2 (Time-Based Output)
This pin connects a parallel-resonant crystal or ceramic resonant to the on-chip
oscillator output.
Port 0 (P07–P00)
Port 0 is an 8-bit, bidirectional, CMOS-compatible port. These eight I/O lines are
configured under software control as a nibble I/O port. The output drivers are
push-pull or open-drain controlled by bit D2 in the PCON register.
If one or both nibbles are needed for I/O operation, they must be configured by
writing to the Port 0 mode register. After a hardware reset, Port 0 is configured as
an input port.
An optional pull-up transistor is available as a mask option on all Port 0 bits with
nibble select.
Notes: Internal pull-ups are disabled on any given pin or group of port
pins when programmed into output mode.
The Port 0 direction is reset to be input following an SMR.
PS023702-1004
Preliminary
Pin Functions