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參數(shù)資料
| 型號： | Z86C44 |
| 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(jī)的CMOS Z8的CMOS（Z8系列微控制器） |
| 文件頁數(shù)： | 28/70頁 |
| 文件大?。?/td> | 1192K |
| 代理商： | Z86C44 |
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Z86C34/C35/C36/C44/C45/C46
CMOS Z8 MCUs with ASCI UART
ZiLOG
28
P R E L I M I N A R Y
DS007601-Z8X0499
PIN FUNCTIONS
(Continued)
Auto Latch.
The Auto Latch places valid CMOS levels on
all CMOS inputs (except
P33–P31
) that are not externally
driven. Whether this level is
0
or
1
cannot be determined.
A valid CMOS level, rather than a floating node, reduces
excessive supply current flow in the input buffer. Auto
Latches are available on Port 0, Port 1, Port 2, and
P30
.
There are no Auto Latches on
P31
,
P32
, and
P33
.
Note:
Deletion of all Port Auto Latches is available as a ROM
Mask option. The Auto Latch Delete option is selected
by the customer when the ROM code is submitted.
RESET
(input, active Low).
Initializes the MCU. Reset is
accomplished either through Power-On Reset, Watch-Dog
Timer reset, Stop-Mode Recovery, or external reset. During
Power-On Reset and Watch-Dog Reset, the internally-gen-
erated reset is driving the
RESET
pin Low for the
POR
time.
Any devices driving the
RESET
line must be open-drain to
avoid damage from a possible conflict during
RESET
con-
ditions.
RESET
depends on oscillator operation to achieve
full reset conditions, except for conditions wherein a
WDT
reset is permanently enabled.
Pull-up is provided internally.
Note:
The
RESET
pin is not available on devices in the 28-pin
package.
After the
POR
time,
RESET
is a Schmitt-triggered input.
During the
RESET
cycle,
DS
is held active Low while
AS
cycles at a rate of
T
P
C/2
. Program execution begins at lo-
cation
000Ch
, after the
RESET
is released. For Power-On
Reset, the reset output time is
T
POR
ms.
When program execution begins,
AS
and
DS
toggles only
for external memory accesses. The Z8 does not reset
WDTMR
,
SMR
,
P2M
,
PCON
, and
P3M
registers on a Stop-
Mode Recovery operation or from a
WDT
reset out of
STOP
mode.
Figure 16. Port 3 Configuration
P34 OUT
P31
+
–
REF (P33)
P34
PAD
P37 OUT
P32
+
–
REF (P33)
0 P34, P37 Standard Output
1 P34, P37 Comparator Output
PCON
D0
P37
PAD
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| Z86C4416FECR514X | 制造商:Zilog Inc 功能描述: |
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| Z86C46 | 制造商:ZILOG 制造商全稱:ZILOG 功能描述:CMOS Z8 MCUs WITH ASCI UART OFFER EFFICIENT, COST-EFFECTIVE DESIGN FLEXIBILITY |
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