ZGP323LAP4008G Zilog, ZGP323LAP4008G Datasheet - Page 14

• Manufacturer Part Number: ZGP323LAP4008G
• Description: IC Z8 GP MCU 8K OTP 40DIP
• Manufacturer: Zilog
• Series: Z8® GP™r

Specifications of ZGP323LAP4008G

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: HLVD, POR, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP
• Ram Size: 237 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 40-DIP (0.620", 15.75mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Other names: 269-4425; ZGP323LAP4008G

Pin Functions
PS023709-0208
Caution:
XTAL1 Crystal 1 (Time-Based Input)
XTAL2 Crystal 2 (Time-Based Output)
Input/Output Ports
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.
This pin connects a parallel-resonant crystal or ceramic resonant to the on-chip oscillator
output.
Input/Output ports are described in the following sections.
The CMOS input buffer for each port 0, 1, or 2 pin is always connected to the pin, even
when the pin is configured as an output. If the pin is configured as an open-drain output
and no signal is applied, a High output state can cause the CMOS input buffer to float.
This might lead to excessive leakage current of more than 100 µA. To prevent this leak-
age, connect the pin to an external signal with a defined logic level or ensure its output
state is Low, especially during STOP mode.
Internal pull-ups are disabled on any given pin or group of port pins when programmed
into output mode.
Port 0, 1 and 2 have both input and output capability. The input logic is always present
no matter whether the port is configured as input or output. When doing a READ in-
struction, it will read the actual value at the input logic not from the output buffer.
In addition, the instruction of "OR", "AND", "XOR" are read-modify-write instructions.
It will first read the port and then modify the value and load back to the port.
Precaution must be taken if the port is configured as open-drain output or driving some
circuit that may make the voltage different from the desired output logic. For example,
pins P00-P07 are not connecting to anything else. If it is configured as open-drain
output with outputting logic ONE, it is a floating port and will read back as ZERO. The
following instruction will set P00-P07 all LOW.
AND P0,#%F0
Product Specification
Pin Description
ZGP323L
10