ST10F166 查看數據表（PDF） - STMicroelectronics
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ST10F166 Datasheet PDF : 62 Pages
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ST10F166
Table 1. Pin Definition and Function
Symbol
P4.0 –
P4.1
XTAL1
XTAL2
BUSACT,
EBC1,
EBC0
VPP
RSTIN
RSTOUT
Pin
Number
16 - 17
16
17
20
19
22
23
24
23
27
28
Input (I)
Output (O)
I/O
O
O
I
O
I
I
I
I
O
Function
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:
P4.0A16Least Significant Segment Addr. Line
P4.1A17Most Significant Segment Addr. Line
XTAL1:Input to the oscillator amplifier and input to the internal
clock generator
XTAL2: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 ob-
served.
External Bus Configuration selection inputs. These pins are sam-
pled during reset and select either the single chip mode or one of
the four external bus configurations:
BUSACTEBC1EBC0Mode/Bus Configuration
00
0
8-bit demultiplexed bus
00
1
8-bit multiplexed bus
01
0
16-bit muliplexed bus
01
1
16-bit demultiplexed bus
10
0
Single chip mode
10
1
Reserved.
11
0
Reserved.
11
1
Reserved.
After reset pin EBC1 accepts the programming voltage for the
Flash Memory as an “alternate function”:
Flash Memory Programming Voltage VPP = 12 V.
Reset Input with Schmitt-Trigger characteristics. A low level at
this pin for a specified duration while the oscillator is running re-
sets the ST10R165. An internal pullup resistor permits power-on
reset using only a capacitor connected to VSS.
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.
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