參數(shù)資料
型號(hào): Q67121C2168A1
英文描述: IC-SM-16 BIT CPU
中文描述: 集成電路的Sm - 16位CPU
文件頁數(shù): 16/121頁
文件大小: 1000K
代理商: Q67121C2168A1
Semiconductor Group
1-10
Introduction
C501
P0.0 – P0.7 43–36
39–32
37–30
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.
V
SS
V
CC
N.C.
22
20
16
Circuit ground potential
44
40
38
Supply terminal
for all operating modes
1, 12,
23, 34
6, 17,
28, 39
No connection
*) I
= Input
O = Output
Table 1-1
Pin Definitions and Functions
(cont’d)
Symbol
Pin Number
I/O*) Function
P-LCC-44 P-DIP-40 P-MQFP-44
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