Z8F0431SJ020SG Zilog, Z8F0431SJ020SG Datasheet - Page 137

• Manufacturer Part Number: Z8F0431SJ020SG
• Description: IC ENCORE XP MCU FLASH 4K 28SOIC
• Manufacturer: Zilog
• Series: Encore!®r

Specifications of Z8F0431SJ020SG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, LED, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• For Use With: 770-1002 - ISP 4PORT ZILOG Z8 ENCORE! MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Other names: 269-4627-5

Non-Volatile Data Storage
Operation
NVDS Code Interface
PS025111-1207
Note:
The Z8 Encore!
element of up to 64 bytes (except in Flash 12 KB mode). This memory can perform over
100,000 write cycles.
The NVDS is implemented by special purpose Zilog
memory not accessible. These special purpose routines use the Flash memory to store the
data. The routines incorporate a dynamic addressing scheme to maximize the write/erase
endurance of the Flash.
Different members of the Z8 Encore! F0830 Series feature multiple NVDS array sizes.
See
Two routines are required to access the NVDS, a write routine and a read routine. Both of
these routines are accessed with a
program memory accessible to you. Both the NVDS address and data are single-byte
values. In order NOT to disturb the user code, these routines save the working register set
before using it, so 16 bytes of stack space is needed to preserve the site. After finishing the
call to these routines, the working register set of the user code is recovered.
During both read and write accesses to the NVDS, interrupt service is NOT disabled. Any
interrupts that occur during the NVDS execution must not disturb the working register and
existing stack contents; or else the array becomes corrupted. Disabling interrupts before
executing NVDS operations is recommended.
Use of the NVDS requires 16 bytes of available stack space. The contents of the working
register set are saved before calling NVDS read or write routines.
For correct NVDS operation, the Flash Frequency Registers must be programmed based
on the system clock frequency. See
Registers
Z8 Encore! F0830 Series Family Part Selection Guide
on page
®
F0830 Series devices contain a Non-Volatile Data Storage (NVDS)
108.
CALL
Flash Operation Timing Using the Flash Frequency
instruction to a pre-defined address outside of the
®
software stored in areas of program
on page 2 for details.
Z8 Encore!
Product Specification
Non-Volatile Data Storage
®
F0830 Series
127