参数资料
型号: C508
厂商: INFINEON TECHNOLOGIES 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: 12/93页
文件大小: 1204K
代理商: C508
C508
Data Sheet
8
2000-08
P2.0-
P2.7
47 - 54
55 - 62
I/O
Port 2
is an 8-bit quasi-bidirectional I/O port with
internal pullup transistors. 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 transistors.
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
transistors 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 and
uses only the internal pullup transistors.
As I/O functions, Port 2 pins also have LED
drive capability of up to 10 mA sinking current
per pin.
XTAL1
Input to the inverting oscillator amplifier and
input to the internal clock generator circuits.
To drive the device from an external clock
source, XTAL1 should be driven, while XTAL2
is left unconnected.
Minimum and maximum high and low times as
well as rise/fall times specified in the AC
characteristics must be observed.
XTAL2
Output of the inverting oscillator amplifier.
XTAL1 42
50
I
XTAL2 41
49
O
Table 1
Sym-
bol
Pin Defintions and Functions
(cont’d)
Pin Numbers
P-MQFP-64 P-SDIP-64
I/O
1)
Function
相关PDF资料
PDF描述
C508 Previous Vectron Model Numbers
C509-L 8-Bit CMOS Microcontroller
C509-L 8-Bit CMOS Microcontroller
C513A-2RM 8-Bit CMOS Microcontroller
C513A-HN 8-Bit CMOS Microcontroller
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