参数资料
型号: C508
厂商: Electronic Theatre Controls, Inc.
英文描述: Previous Vectron Model Numbers
中文描述: 前Vectron型号
文件页数: 14/93页
文件大小: 1204K
代理商: C508
C508
Data Sheet
10
2000-08
P0.0-
P0.7
57 - 64
1 - 8
I/O
Port 0
is an 8-bit open-drain bidirectional I/O port. Port
0 pins that have “1”s written to them float, and
in that state can be used as high-impedance
inputs. Port 0 is also the multiplexed low-order
address and data bus during accesses to
external program or data memory. In this
application it uses strong internal pullup
transistors when issuing “1”s.
Port 0 also outputs the code bytes during
program verification in the C508-4R. External
pullup resistors are required during program
verification.
Port 5
is a an 8-bit quasi-bidirectional I/O port with
internal pullup transistors. Port 5 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 5 pins being
externally pulled low will source current (
I
IL
, in
the DC characteristics) because of the internal
pullup transistors.
As secondary functions, Port 5 contains the
interrupt and Timer 2 capture/compare pins.
They are assigned to the pins as follows:
P5.0-
P5.7
15 - 22
23 - 30
I/O
P5.0/T2CC0/INT3 T2 Compare/Capture
output 0/Interrupt 3 input
P5.1/T2CC1/INT4 T2 Compare/Capture
output 1/Interrupt 4 input
P5.2/T2CC2/INT5 T2 Compare/Capture
output 2/Interrupt 5 input
P5.3/T2CC3/INT6 T2 Compare/Capture
output 3/Interrupt 6 input
P5.4/INT2
Interrupt 2 input
P5.5/INT9
Interrupt 9 input
P5.6/INT8
Interrupt 8 input
P5.7/INT7
Interrupt 7 input
Table 1
Sym-
bol
Pin Defintions and Functions
(cont’d)
Pin Numbers
P-MQFP-64 P-SDIP-64
I/O
1)
Function
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