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Q67120-C1054 데이터시트(PDF) 12 Page - Infineon Technologies AG |
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Q67120-C1054 데이터시트(HTML) 12 Page - Infineon Technologies AG |
12 / 48 page C501 Semiconductor Group 12 1997-04-01 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 22 20 16 – Circuit ground potential V CC 44 40 38 – Supply terminal for all operating modes N.C. 1, 12, 23, 34 – 6, 17, 28, 39 – No connection *) I = Input O = Output Table 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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