Z8F041APH020SG2156 ZiLOG, Z8F041APH020SG2156 Datasheet - Page 193

no-image

Z8F041APH020SG2156

Manufacturer Part Number
Z8F041APH020SG2156
Description
8-bit Microcontrollers - MCU 4K FLASH 1K RAM 128B NVDS
Manufacturer
ZiLOG
Datasheet

Specifications of Z8F041APH020SG2156

Rohs
yes
Core
eZ8
Processor Series
Z8F041xx
Data Bus Width
8 bit
Maximum Clock Frequency
20 MHz
Program Memory Size
4 KB
Data Ram Size
1 KB
On-chip Adc
Yes
Operating Supply Voltage
2.7 V to 3.6 V
Operating Temperature Range
- 40 C to + 105 C
Package / Case
PDIP-20
Mounting Style
Through Hole
A/d Bit Size
10 bit
A/d Channels Available
8
Interface Type
UART
Maximum Operating Temperature
+ 105 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
17
Number Of Timers
2
Program Memory Type
Flash
Supply Voltage - Max
3.6 V
Supply Voltage - Min
2.7 V
Nonvolatile Data Storage
PS022827-1212
Operation
NVDS Code Interface
Note:
The Z8 Encore! XP F082A Series devices contain a nonvolatile data storage (NVDS) ele-
ment of up to 128 bytes. This memory can perform over 100,000 write cycles.
The NVDS is implemented by special purpose Zilog software stored in areas of program
memory, which are not user-accessible. These special-purpose routines use the Flash
memory to store the data. The routines incorporate a dynamic addressing scheme to maxi-
mize the write/erase endurance of the Flash.
Different members of the Z8 Encore! XP F082A Series feature multiple NVDS array
sizes; see the
of Flash memory do not include the NVDS feature.
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 predefined address outside of the
user-accessible program memory. Both the NVDS address and data are single-byte values.
Because these routines disturb the working register set, user code must ensure that any
required working register values are preserved by pushing them onto the stack or by
changing the working register pointer just prior to NVDS execution.
During both read and write accesses to the NVDS, interrupt service is NOT disabled. Any
interrupts that occur during the NVDS execution must take care not to disturb the working
register and existing stack contents or else the array may become corrupted. Disabling
interrupts before executing NVDS operations is recommended.
Use of the NVDS requires 15 bytes of available stack space. Also, the contents of the
working register set are overwritten.
For correct NVDS operation, the Flash Frequency registers must be programmed based on
the system clock frequency (see the
Registers
section on page 149).
Part Selection Guide
P R E L I M I N A R Y
section on page 2 for details. Devices containing 8 KB
Flash Operation Timing Using the Flash Frequency
Z8 Encore! XP
Product Specification
Nonvolatile Data Storage
®
F082A Series
176

Related parts for Z8F041APH020SG2156