Z8F042AHJ020SC00TR Zilog, Z8F042AHJ020SC00TR Datasheet - Page 183

• 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

PS022825-0908
Table 104. NVDS Read Time (Continued)
If NVDS read performance is critical to your software architecture, there are some things
you can do to optimize your code for speed, listed in order from most helpful to least
helpful:
Operation
Read (128 byte array)
Write (16 byte array)
Write (64 byte array)
Write (128 byte array)
Illegal Read
Illegal Write
•
•
Periodically refresh all addresses that are used. The optimal use of NVDS in terms of
speed is to rotate the writes evenly among all addresses planned to use, bringing all
reads closer to the minimum read time. Because the minimum read time is much less
than the write time, however, actual speed benefits are not always realized.
Use as few unique addresses as possible: this helps to optimize the impact of
refreshing as well as minimize the requirement for it.
Minimum
Latency
4973
4971
4984
883
43
31
Maximum
Latency
7609
5009
5013
5023
31
43
Z8 Encore! XP
Product Specification
Non-Volatile Data Storage
®
F082A Series
172