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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HPC16004 датащи(PDF) 12 Page - National Semiconductor (TI) |
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HPC16004 датащи(HTML) 12 Page - National Semiconductor (TI) |
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12 / 36 page  Connection Diagrams (Continued) Pin Grid Array Pinout TLDD11372 34 Top View (looking down on component side of PC Board) Order Number HPC16064XXXU20 HPC16064XXXU30 HPC16004U20 or HPC16004U30 See NS Package Number U68A Note XXX designates the unique ROM code of a masked device PortsAB The highly flexible A and B ports are similarly structured The Port A (see Figure 11 ) consists of a data register and a direction register Port B (see Figures 12 13 and 14 ) has an alternate function register in addition to the data and direc- tion registers All the control registers are readwrite regis- ters The associated direction registers allow the port pins to be individually programmed as inputs or outputs Port pins se- lected as inputs are placed in a TRI-STATE mode by reset- ting corresponding bits in the direction register A write operation to a port pin configured as an input causes the value to be written into the data register a read opera- tion returns the value of the pin Writing to port pins config- ured as outputs causes the pins to have the same value reading the pins returns the value of the data register Primary and secondary functions are multiplexed onto Port B through the alternate function register (BFUN) The sec- ondary functions are enabled by setting the corresponding bits in the BFUN register 12 |
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