C501G-1E SIEMENS [Siemens Semiconductor Group], C501G-1E Datasheet - Page 16
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C501G-1E
Manufacturer Part Number
C501G-1E
Description
8-Bit Single-Chip Microcontroller
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.C501G-1E.pdf
(121 pages)
- Current page: 16 of 121
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Table 1-1
Pin Definitions and Functions (cont’d)
Symbol
P0.0 – P0.7 43–36
V
V
N.C.
Semiconductor Group
*) I
SS
CC
O = Output
= Input
P-LCC-44 P-DIP-40 P-MQFP-44
22
44
1, 12,
23, 34
Pin Number
39–32
20
40
–
37–30
16
38
6, 17,
28, 39
1-10
I/O*) Function
I/O
–
–
–
Port 0
is an 8-bit open-drain bidirectional I/O
port. Port 0 pins that have 1s 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 pull-up
resistors when issuing 1s.
Port 0 also outputs the code bytes during
program verification in the C501-1R and
C501-1E. External pull-up resistors are
required during program verification.
Circuit ground potential
Supply terminal for all operating modes
No connection
Introduction
C501
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