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W77L516A25FL Datasheet(PDF) 5 Page - Winbond |
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W77L516A25FL Datasheet(HTML) 5 Page - Winbond |
5 / 89 page W77LE516/W77L516A Publication Release Date: February 1, 2007 - 5 - Revision A6 Pin Description, continued SYMBOL TYPE DESCRIPTIONS P3.0 −P3.7 I/O PORT 3: Port 3 is a bi-directional I/O port with internal pull-ups. All bits have alternate functions, which are described below: RXD(P3.0) : Serial Port 0 input TXD(P3.1) : Serial Port 0 output INT0 (P3.2) : External Interrupt 0 INT1 (P3.3) : External Interrupt 1 T0(P3.4) : Timer 0 External Input T1(P3.5) : Timer 1 External Input WR (P3.6) : External Data Memory Write Strobe RD (P3.7) : External Data Memory Read Strobe P4.0 −P4.3 I/O PORT 4: Port 4 is a 4-bit bi-directional I/O port. The P4.0 also provides the alternate function WAIT which is the wait state control signal. The P4.3 also provide the alternate function /REBOOT which is H/W reboot from LD flash. * Note: TYPE I: input, O: output, I/O: bi-directional. |
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