Z8F011ASH020EG2156 ZiLOG, Z8F011ASH020EG2156 Datasheet - Page 75
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Z8F011ASH020EG2156
Manufacturer Part Number
Z8F011ASH020EG2156
Description
8-bit Microcontrollers - MCU 1K FLASH 256B RAM 16B NVDS
Manufacturer
ZiLOG
Datasheet
1.Z8F011AHJ020EG2156.pdf
(257 pages)
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
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Interrupt Control Register Definitions
Caution:
Software Interrupt Assertion
To avoid missing interrupts, use the coding style in Example 2 to clear bits in the Interrupt
Request 0 Register:
Example 2.
Program code can generate interrupts directly. Writing 1 to the correct bit in the interrupt
request register triggers an interrupt (assuming that interrupt is enabled). When the inter-
rupt request is acknowledged by the eZ8 CPU, the bit in the interrupt request register is
automatically cleared to 0.
Example 3.
To avoid missing interrupts, use the coding style in Example 4 to set bits in the Interrupt
Request registers:
Example 4.
The Interrupt Control registers enable individual interrupts, set interrupt priorities and
indicate interrupt requests for all of the interrupts other than the Watchdog Timer interrupt,
the primary oscillator fail trap and the Watchdog Oscillator fail trap interrupts.
Zilog recommends not using a coding style to generate software interrupts by setting bits
in the Interrupt Request registers. All incoming interrupts received between execution of
the first LDX command and the final LDX command are lost. See Example 3, which fol-
lows.
LDX r0, IRQ0
AND r0, MASK
LDX IRQ0, r0
ANDX IRQ0, MASK
LDX r0, IRQ0
OR r0, MASK
LDX IRQ0, r0
ORX IRQ0, MASK
A good coding style that avoids lost interrupt requests:
A poor coding style that can result in lost interrupt requests:
A good coding style that avoids lost interrupt requests:
Interrupt Control Register Definitions
Z8 Encore!
Product Specification
®
F0830 Series
57
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