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深圳市伟力升电子有限公司
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90SQ040
| 90SQ040资料 | |
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90SQ040 PDF Download |
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File Size : 116 KB
Manufacturer:IR Description:T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction Control Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 2 pins that are externally pulled low will source current because of the internal pull-ups. 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 pull-ups emitting 1s. During accesses to external data memory that use 8-bit addresses (MOVX @Ri), port 2 emits the contents of the P2 SFR. Some Port 2 pins receive the high order address bits during EPROM programming and verification: P2.0 to P2.5 for A8 to A13 Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 3 pins that are externally pulled low will source current because of the internal pull-ups. Some Port 3 pin P3.4 receive the high order address bits during EPROM programming and verification for TS8xC58X2 devices. Port 3 also serves the special features of the 80C51 family, as listed below. RXD (P3.0): Serial input port |
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| 1PCS | 100PCS | 1K | 10K | ||
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型 号：90SQ040 厂 家：IR 封 装：DO-204AR 批 号：06+ 数 量：5000 说 明： |
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运 费： 所在地： 新旧程度： |
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联系我们：
| 联系人：邹先生/古小姐 |
| 电 话：0755-82565092 |
| 手 机：13570850687 |
| QQ：845101393,262320598 |
| MSN：guruli3@hotmail.com |
| 传 真：0755-83291863 |
| EMail：guruli2003@yahoo.com.cn |
| 公司地址： 深圳市福田区振中路新亚洲电子商城2期N1B101 |
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