Z8F011ASH020EG2156 ZiLOG, Z8F011ASH020EG2156 Datasheet - Page 132

• Manufacturer Part Number: Z8F011ASH020EG2156
• Description: 8-bit Microcontrollers - MCU 1K FLASH 256B RAM 16B NVDS
• Manufacturer: ZiLOG

Specifications of Z8F011ASH020EG2156

• Rohs: yes
• Core: eZ8
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 20 MHz
• Program Memory Size: 1 KB
• Data Ram Size: 256 B
• On-chip Adc: No
• Package / Case: SOIC-20
• Mounting Style: SMD/SMT
• 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

PS025113-1212
Caution:
Flash Operation Timing Using the Flash Frequency Registers
Flash Code Protection Against External Access
Flash Code Protection Against Accidental Program and
Erasure
Before performing either a Program or Erase operation on Flash memory, the user must
first configure the Flash Frequency High and Low Byte registers. The Flash frequency
registers allow programming and erasing of the Flash with system clock frequencies rang-
ing from 10 kHz to 20 MHz.
The Flash Frequency High and Low Byte registers combine to form a 16-bit value,
to control the timing for Flash Program and Erase operations. The 16-bit binary Flash fre-
quency value must contain the system clock frequency (in kHz). This value is calculated
using the following equation:
FFREQ[15:0]
The user code contained within Flash memory can be protected against external access by
using the On-Chip Debugger. Programming the FRP Flash option bit prevents reading of
the user code using the On-Chip Debugger. For more information, see the
Bits
The Z8 Encore! F0830 Series provides several levels of protection against accidental pro-
gram and erasure of the Flash memory contents. This protection is provided by a combina-
tion of the Flash option bits, the register locking mechanism, the page select redundancy
and the sector level protection control of the Flash Controller.
Flash Code Protection Using the Flash Option Bits
The FHSWP and FWP Flash option bits combine to provide three levels of Flash program
memory protection, as listed in Table 71. See the
for more information.
Flash programming and erasure are not supported for system clock frequencies below
10 kHz or above 20 MHz. The Flash Frequency High and Low Byte registers must be
loaded with the correct value to ensure operation of the Z8 Encore! F0830 Series devices.
chapter on page 124 and the
=
System Clock Frequency (Hz)
------------------------------------------------------------------------
1000
On-Chip Debugger
Flash Option Bits
chapter on page 139.
Z8 Encore!
Product Specification
chapter on page 124
®
Flash Option
F0830 Series
Operation
FFREQ
,
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