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UPD70741GC-25-8EU Datasheet(PDF) 8 Page - NEC |
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UPD70741GC-25-8EU Datasheet(HTML) 8 Page - NEC |
8 / 112 page µPD70741 8 (1/2) 1. PIN FUNCTIONS 1.1 Port Pins Pin name Input/output Function Dual-function pin P00 Input/output Port 0 TCLR P01 10-bit input/output port DREQ0 P02 Can be set for input/output bit. DACK0 P03 DREQ1 P04 DACK1 P05 SI P06 SO P07 SCLK P08 TXD/UBE P09 RXD/TC Remark After a reset is released, each port pin is set as an input port pin. 1.2 Non-Port Pins Pin name Input/output Function Dual-function pin A0-A23 Tristate output Address bus signal - D0-D15 Tristate input/output Bidirectional data bus signal - READY Input Bus cycle termination permit signal - HLDRQ Input Bus mastership request signal - HLDAK Output Bus mastership permit signal - BLOCK Output Bus mastership prohibit signal WDTOUT MRD Tristate output Read strobe signal to memory - LMWR Tristate output Write strobe signal to lower data in memory WE UMWR Tristate output Write strobe signal to upper data in memory - IORD Tristate output Read strobe signal to I/O data - IOWR Tristate output Write strobe signal to I/O data - UBE Tristate output Data bus upper data enable signal TXD/P08 RESET Input System reset input - X1, X2 Input Crystal connection/external clock input - |
Similar Part No. - UPD70741GC-25-8EU |
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Similar Description - UPD70741GC-25-8EU |
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