3 / 13 page  CY7C1021CV33 Document #: 38-05132 Rev. *G Page 3 of 13 Pin Definitions Pin Name SOJ, TSOP Pin Number BGA Pin Number I/O Type Description A0–A15 1–5, 18–21, 24–27, 42–44 A3, A4, A5, B3, B4, C3, C4, D4, H2, H3, H4, H5, G3, G4, F3, F4 Input Address Inputs used to select one of the address locations. I/O0–I/O15 [3] 7–10, 13–16, 29–32, 35–38 B6, C6, C5, D5, E5, F5, F6, G6, B1, C1, C2, D2, E2, F2, F1, G1 Input/Output Bidirectional Data I/O lines. Used as input or output lines depending on operation. NC 22, 23, 28 A6, D3, E3, E4, G2, H1, H6 No Connect No Connects. Not connected to the die. WE 17 G5 Input/Control Write Enable Input, active LOW. When selected LOW, a Write is conducted. When deselected HIGH, a Read is conducted. CE 6 B5 Input/Control Chip Enable Input, active LOW. When LOW, selects the chip. When HIGH, deselects the chip. BHE, BLE 40, 39 B2, A1 Input/Control Byte Write Select Inputs, active LOW. BHE controls I/O16–I/O9, BLE controls I/O8–I/O1. OE 41 A2 Input/Control Output Enable, active LOW. Controls the direction of the I/O pins. When LOW, the I/O pins are allowed to behave as outputs. When deasserted HIGH, I/O pins are tri-stated, and act as input data pins. VSS 12,34 D1, E6 Ground Ground for the device. Should be connected to ground of the system. VCC 11,33 D6, E1 Power Supply Power Supply inputs to the device. Note: 3. I/O1–I/O16 for SOJ/TSOP and I/O0–I/O15 for BGA packages. [+] Feedback [+] Feedback |
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