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參數(shù)資料
| 型號： | 83C166 |
| 廠商： | SIEMENS AG |
| 英文描述： | 16-Bit CMOS Single-Chip Microcontroller |
| 中文描述： | 16位CMOS單芯片微控制器 |
| 文件頁數(shù)： | 5/52頁 |
| 文件大小： | 541K |
| 代理商： | 83C166 |
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SAB 80C166/83C166
Semiconductor Group
4
Pin Definitions and Functions
Symbol
Pin
Number
16-17
Input
Output
I/O
Function
P4.0 –
P4.1
16
17
O
O
Port 4 is a 2-bit bidirectional I/O port. It is bit-wise
programmable for input or output via direction bits. For a pin
configured as input, the output driver is put into high-impedance
state.
In case of an external bus configuration, Port 4 can be used to
output the segment address lines:
P4.0
A16
Least Significant Segment Addr. Line
P4.1
A17
Most Significant Segment Addr. Line
XTAL1
XTAL2
20
19
I
O
XTAL1:
Input to the oscillator amplifier and input to the
internal clock generator
Output of the oscillator amplifier circuit.
To clock the device from an external source, drive XTAL1, while
leaving XTAL2 unconnected. Minimum and maximum high/low
and rise/fall times specified in the AC Characteristics must be
observed.
XTAL2:
BUSACT,
EBC1,
EBC0
22
23
24
I
I
I
External Bus Configuration selection inputs. These pins are
sampled during reset and select either the single chip mode or
one of the four external bus configurations:
BUSACT EBC1
EBC0
Mode/Bus Configuration
0
0
0
8-bit demultiplexed bus
0
0
1
8-bit multiplexed bus
0
1
0
16-bit multiplexed bus
0
1
1
16-bit demultiplexed bus
1
0
0
Single chip mode
1
0
1
Reserved.
1
1
0
Reserved.
1
1
1
Reserved.
ROMless versions must have pin BUSACT tied to ‘0’.
RSTIN
27
I
Reset Input with Schmitt-Trigger characteristics. A low level at
this pin for a specified duration while the oscillator is running
resets the SAB 80C166. An internal pullup resistor permits
power-on reset using only a capacitor connected to
V
SS
.
Internal Reset Indication Output. This pin is set to a low level
when the part is executing either a hardware-, a software- or a
watchdog timer reset. RSTOUT remains low until the EINIT
(end of initialization) instruction is executed.
RSTOUT
28
O
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