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参数资料
| 型号： | C509-L |
| 厂商： | SIEMENS AG |
| 元件分类： | 8位微控制器 |
| 英文描述： | 8-Bit CMOS Microcontroller |
| 中文描述： | 8位CMOS微控制器 |
| 文件页数： | 11/74页 |
| 文件大小： | 1607K |
| 代理商： | C509-L |
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C509-L
Semiconductor Group
10
P8.0 - P8.6
57-60,
51-53
I
Port 8
is a 7-bit unidirectional input port. Port pins can be used
for digital input if voltage levels meet the specified input
high/low voltages, and for the higher 7-bit of the
multiplexed analog inputs of the A/D converter
simultaneously.
P8.0 - P8.6
AIN8 - AIN14
Analog input 8 - 14
RO
61
O
Reset Output
This pin outputs the internally synchronized reset
request signal. This signal may be generated by an
external hardware reset, a watchdog timer reset or an
oscillator watchdog reset. The RO output is active low.
P4.0 – P4.7
64-66,
68-72
I/O
Port 4
is an 8-bit quasi-bidirectional I/O port with internal pull-up
resistors. Port 4 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 4 pins being
externally pulled low will source current (
I
IL
, in the DC
characteristics) because of the internal pull-up resistors.
Port 4 also erves as alternate compare functions. The
output latch corresponding to a secondary functionmust
be programmed to a one (1) for that function to operate.
The secondary functions are assigned to the pins of port
4 as follows :
P4.0 - P4.7
CM0 - CM7
Compare channel 0 - 7
PE / SWD
67
I
Power Saving Modes Enable / Start Watchdog Timer
A low level on this pin allows the software to enter the
power down mode, idle and slow down mode. If the low
level is also seen during reset, the watchdog timer
function is off on default.
Usage of the software controlled power saving modes is
blocked, when this pin is held on high level. A high level
during reset performs an automatic start of the watchdog
timer immediately after reset.
When left unconnected this pin is pulled high by a weak
internal pullup resistor. During hardware power down the
pullup resistor is switched off.
*) I = Input
O = Output
Table 1
Pin Definitions and Functions (cont’d)
Symbol
Pin Number
I/O*)
Function
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