Z8F2480AN020SG Zilog, Z8F2480AN020SG Datasheet - Page 295

• Manufacturer Part Number: Z8F2480AN020SG
• Description: MCU 8BIT 24KB FLASH 44LQFP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F2480AN020SG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 37
• Program Memory Size: 24KB (24K x 8)
• Program Memory Type: FLASH
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-LQFP
• Processor Series: Z8F248x
• Core: eZ8
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: I2C, SPI, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 37
• Number Of Timers: 3
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit, 8 Channel
• For Use With: 770-1002 - ISP 4PORT ZILOG Z8 ENCORE! MCU269-4643 - KIT DEV Z8 ENCORE XP 28-PIN269-4630 - DEV KIT FOR Z8 ENCORE 8K/4K269-4629 - KIT DEV Z8 ENCORE XP 28-PIN269-4628 - KIT DEV Z8 ENCORE XP 8-PIN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 269-4676

Non-Volatile Data Storage
Overview
Operation
NVDS Code Interface
PS025011-1010
Note:
The Z8 Encore! XP F1680 Series devices contain a Non-Volatile Data Storage (NVDS)
element of up to 256 bytes. This memory can perform over 100,000 write cycles.
The NVDS is implemented by special purpose Zilog
memory not accessible to you. 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! XP F1680 Series feature multiple NVDS array sizes.
For more details, see
Two routines are required to access the NVDS: a write routine and a read routine. Both of
these routines are accessed with a CALL instruction to a pre-defined address outside the
program memory accessible to you. Both the NVDS address and data are single-byte val-
ues. 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. For more details, see
Frequency Registers
on page 258.
Table 1
P R E L I M I N A R Y
on page 2.
®
Flash Operation Timing Using Flash
software stored in areas of Program
Z8 Encore! XP
Product Specification
Non-Volatile Data Storage
®
F1680 Series
281