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參數(shù)資料
| 型號： | Z86C46 |
| 廠商： | ZiLOG, Inc. |
| 英文描述： | CMOS Z8 MCU(CMOS Z8系列微控制器) |
| 中文描述： | 單片機的CMOS Z8的CMOS（Z8系列微控制器） |
| 文件頁數(shù)： | 58/70頁 |
| 文件大?。?/td> | 1192K |
| 代理商： | Z86C46 |
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Z86C34/C35/C36/C44/C45/C46
CMOS Z8 MCUs with ASCI UART
ZiLOG
58
P R E L I M I N A R Y
DS007601-Z8X0499
MASK OPTIONS
Below is an example of the ROM mask bit option selection
for this product.
ROM Protect.
Selecting the
DISABLE ROM PROTECT
op-
tion
READ
s the software program that is in the program
memory using ZiLOG’s internal factory test mode. How-
ever, none of the standard methods for reading or verifying
the code in the microcontroller uses an EPROM program-
mer. With this option disabled, ZiLOG is able to fully test
the ROM memory and provides its standard warranty for
the part. Selecting the
ENABLE ROM PROTECT
option ne-
gates the possibility of reading the code out of the part using
a tester, programmer, or any other standard method. ZiLOG
will be unable to test the ROM memory at any time prior
to customer delivery.
The
ROM PROTECT
option bit only affects the ability to
read the code and does not affect the operation of the part
in an application. If the
ROM PROTECT
option is disabled,
ZiLOG tests the part for ROM fallout and parts which fail
are not shipped to the customer. When the
ROM PROTECT
option is enabled, ZiLOG cannot perform these tests on the
ROM. When
ROM PROTECT
is enabled, except for the im-
proper transfer of the code by ZiLOG, all ROM memory
software errors shall be the responsibility of the Buyer and
ZiLOG shall have no obligation to repair or replace product
containing software errors. Selecting the
ENABLE ROM
PROTECT
option waives all warranties of ZiLOG, ex-
pressed or implied, on microcontrollers containing ROM
failures including, but not limited to, the implied warranty
of merchantability and fitness for a particular purpose.
RAM Protect.
Selecting the
DISABLE RAM PROTECT
op-
tion does not affect the RAM memory. RAM memory op-
erates as defined in this Product Specification for all address
locations. Selecting the
ENABLE RAM PROTECT
option,
allows protection (under software control) of a portion of
the RAM’s address space from being read or written.
System Clock Source.
Selecting the
RC OSCILLATOR
ENABLE
option, configures the oscillator circuit on the mi-
crocontroller to work with an external RC circuit. Selecting
the
CRYSTAL/OTHER CLOCK SOURCE
option configures
the oscillator circuit to work with an external crystal, ce-
ramic resonator, or LC oscillator.
Oscillator Operational Mode.
Selecting the
NORMAL
HIGH FREQUENCY OPERATION ENABLED
option en-
ables the part to operate using a standard crystal or resona-
tor, but it does not operate using a 32-kHz crystal. Selecting
the
32-KHZ
OPERATION ENABLED
option enables the mi-
crocontroller to work with a 32-kHz crystal and an external
feedback resistor—these must be supplied between the
XTAL1
and
XTAL2
pins. (If
RC OSCILLATOR ENABLED
is selected in the
SYSTEM CLOCK SOURCE
option, this
option defaults to the
NORMAL HIGH FREQUENCY OP-
ERATION ENABLED
bit.)
WDT Mode.
Selecting the
WDT ENABLED BY SOFT-
WARE ONLY
option operates the Watch Dog Timer (WDT)
when turned on under software control. Selecting the
WDT
ENABLED AUTOMATICALLY AFTER RESET
option starts
the WDT automatically at
RESET
.There is no way to dis-
able or stop this mode, making it necessary in the code to
periodically clear the WDT to prevent it from resetting the
microcontroller. If the
WDT ENABLED AUTOMATICAL-
LY AFTER RESET
option and the
WDT DRIVEN BY SYS-
TEM CLOCK
option (if offered) are selected, the WDT
nev-
Options
Option Selections
ROM Protect
RAM Protect
System Clock Source
Oscillator Operational Mode
Disable ROM Protect
Disable RAM Protect
RC Oscillator Enable
Normal High-Frequency Operation
Enabled
WDT Enabled by Software Only
Enable ROM Protect
Enable RAM Protect
Crystal/Other Clock Source
32-kHz Crystal Operation Enabled
(Limits High-Frequency Operation)
WDT Enabled Automatically After
RESET
Enable Auto Latches
Enable Pull-Ups
Enable Pull-Ups
Enable Pull-Ups
WDT Mode
Auto Latch Mode
Port 0 Pull-Ups
Port 1 Pull-Ups
Port 2 Pull-Ups
Disable Auto Latches
Disable Pull-Ups
Disable Pull-Ups
Disable Pull-Ups
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