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ST16C650AIQ48 Arkusz danych(PDF) 3 Page - Exar Corporation |
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ST16C650AIQ48 Arkusz danych(HTML) 3 Page - Exar Corporation |
3 / 53 page áç áç áç áç ST16C650A REV. 5.0.0 2.90V TO 5.5V UART WITH 32-BYTE FIFO 3 PIN DESCRIPTIONS ORDERING INFORMATION PART NUMBER PACKAGE OPERATING TEMPERATURE RANGE DEVICE STATUS ST16C650ACP40 40-Lead PDIP 0°C to +70°C Discontinued. See the ST16C650ACQ48 for a replacement. ST16C650ACJ44 44-Lead PLCC 0°C to +70°C Active ST16C650ACQ48 48-Lead TQFP 0°C to +70°C Active ST16C650AIP40 40-Lead PDIP -40°C to +85°C Discontinued. See the ST16C650AIQ48 for a replacement. ST16C650AIJ44 44-Lead PLCC -40°C to +85°C Active ST16C650AIQ48 48-Lead TQFP -40°C to +85°C Active NAME 40- PDIP PIN # 44- PLCC PIN # 48- TQFP PIN # TYPE DESCRIPTION 16 (Intel) MODE DATA BUS INTERFACE. The SEL pin is connected to VCC. A2 A1 A0 26 27 28 29 30 31 26 27 28 I Address bus lines [2:0] A2:A0 selects internal UART’s configuration registers. D7 D6 D5 D4 D3 D2 D1 D0 8 7 6 5 4 3 2 1 9 8 7 6 5 4 3 2 4 3 2 47 46 45 44 43 IO Data bus lines [7:0] (bidirectional) IOR# 21 24 19 I Input/Output Read (active low) The falling edge instigates an internal read cycle and retrieves the data byte from an internal register pointed by the address lines [A2:A0], places it on the data bus to allow the host processor to read it on the leading edge. Its function is the same as IOR, except it is active low. Either an active IOR# or IOR is required to transfer data from 650A to CPU during a read operation. If this input is unused, it should be connected to VCC to minimize supply current. IOR 222520 I Input/Output Read (active high) Same as IOR# but active high. If this input is unused, it should be con- nected to GND to minimize supply current. IOW# 18 20 16 I Input/Output Write (active low) - Intel bus mode The falling edge instigates the internal write cycle and the trailing edge transfers the data byte on the data bus to an internal register pointed by the address lines [A2:A0]. Its function is the same as IOW, except it is active low. Either an active IOW# or IOW is required to transfer data from 650A to the Intel type CPU during a write operation. If this input is unused, it should be connected to VCC to minimize supply current. |
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