Z8F042AHJ020SC00TR Zilog, Z8F042AHJ020SC00TR Datasheet - Page 49

• Manufacturer Part Number: Z8F042AHJ020SC00TR
• Description: IC ENCORE XP MCU FLASH 4K 28SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHJ020SC00TR

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IrDA, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 23
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Z8F042AHJ020SC00T

Architecture
GPIO Alternate Functions
PS022825-0908
System
DATA
Clock
Bus
Data Register
Port Output
Figure 7
ability to accommodate alternate functions and variable port current drive strength is not
displayed.
Many of the GPIO port pins can be used for general-purpose I/O and access to on-chip
peripheral functions such as the timers and serial communication devices. The Port A–D
Alternate Function sub-registers configure these pins for either General-Purpose I/O or
alternate function operation. When a pin is configured for alternate function, control of the
port pin direction (input/output) is passed from the Port A–D Data Direction registers to
the alternate function assigned to this pin.
possible with each port pin. For those pins with more one alternate function, the alternate
function is defined through Alternate Function Sets sub-registers AFS1 and AFS2.
The crystal oscillator functionality is not controlled by the GPIO block. When the crystal
oscillator is enabled in the oscillator control block, the GPIO functionality of PA0 and PA1
is overridden. In that case, those pins function as input and output for the crystal oscillator.
D
Q
displays a simplified block diagram of a GPIO port pin. In this figure, the
Figure 7. GPIO Port Pin Block Diagram
System
Clock
Port Output Control
Port Data Direction
Data Register
Port Input
Q
D
Table 14
on page 41 lists the alternate functions
Q
Z8 Encore! XP
D
General-Purpose Input/Output
Schmitt-Trigger
Product Specification
GND
VDD
®
F082A Series
Port
Pin
38