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參數資料
| 型號： | SABC517A-LN |
| 廠商： | SIEMENS AG |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 BIT CMOS MICROCONTROLLER |
| 中文描述： | 8位CMOS單片機 |
| 文件頁數： | 9/72頁 |
| 文件大?。?/td> | 845K |
| 代理商： | SABC517A-LN |
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Semiconductor Group
7
C517A
V
SS
10, 62
37, 83
–
Ground
(0V)
during normal, idle, and power down
operation.
V
DD
11, 63
38, 84
–
Supply voltage
during normal, idle, and power down mode.
XTAL2
12
39
–
XTAL2
is the input to the inverting oscillator
amplifier and input to the internal clock
generator circuits.
To drive the device from an external clock
source, XTAL2 should be driven, while
XTAL1 is left unconnected.
Minimum and
maximum high and low times as well as rise/
fall times specified in the AC characteristics
must be observed.
XTAL1
13
40
–
XTAL1
is the output of the inverting oscillator
amplifier. This pin is used for the oscillator
operation with crystal or ceramic resonator.
P2.0 - P2.7
14 - 21
41 - 48
I/O
Port 2
is an 8-bit quasi-bidirectional I/O port with
internal pullup resistors. Port 2 pins that
have 1's written to them are pulled high by
the internal pullup resistors, and in that state
can be used as inputs. As inputs, port 2 pins
being externally pulled low will source
current (
I
IL
, in the DC characteristics)
because of the internal pullup resistors.
Port 2 emits the high-order address byte
during fetches from external program
memory and during accesses to external
data memory that use 16-bit addresses
(MOVX @DPTR). In this application it uses
strong internal pullup resistors when issuing
1's. During accesses to external data
memory that use 8-bit addresses
(MOVX @Ri), port 2 issues the contents of
the P2 special function register.
*) I = Input
O = Output
Table 1
Pin Definitions and Functions
(cont’d)
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,2
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304)3
3/&&
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