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參數(shù)資料
| 型號： | SAH-C517A |
| 廠商： | INFINEON TECHNOLOGIES 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(shù)： | 11/72頁 |
| 文件大?。?/td> | 845K |
| 代理商： | SAH-C517A |
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Semiconductor Group
9
C517A
HWPD
36
60
I
Hardware Power Down
A low level on this pin for the duration of one
machine cycle while the oscillator is running
resets the C517A. A low level for a longer
period will force the part into hardware
power down mode with the pins floating.
There is no internal pullup resistor
connected to this pin.
P5.0 - P5.7
44 - 37
68 - 61
I/O
Port 5
is a quasi-bidirectional I/O port with internal
pull-up resistors. Port 5 pins that have 1 s
written to them are pulled high by the
internal pull-up resistors, and in that state
can be used as inputs. As inputs, port 5 pins
being externally pulled low will source
current (
I
IL
, in the DC characteristics)
because of the internal pull-up resistors.
This port also serves the alternate function
"Concurrent Compare" and "Set/Reset
Compare". The secondary functions are
assigned to the port 5 pins as follows:
CCM0 to CCM7 P5.0 to P5.7 :
concurrent compare or
Set/Reset lines
OWE
45
69
I
Oscillator Watchdog Enable
A high level on this pin enables the oscillator
watchdog. When left unconnected this pin is
pulled high by a weak internal pull-up
resisitor. The logic level at OWE should not
be changed during normal operation. When
held at low level the oscillator watchdog
function is turned off. During hardware
power down the pullup resistor is switched
off.
*) I = Input
O = Output
Table 1
Pin Definitions and Functions
(cont’d)
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