APD-32A025A Vishay, APD-32A025A Datasheet
APD-32A025A
Related parts for APD-32A025A
APD-32A025A Summary of contents
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... It’s field of 32 quarter inch (0.65cm) characters (in 2 rows of 16) provides a compact yet highly legible display. The APD-32A025A supplies signals to scan and decode keyboards keys, and can also interface to 8 bit microprocessors via it’s 8 bit bi-directional data bus. It’s ...
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... J2 - Vishay Dale P/N 280105-01 or Tyco AMP 746285-6. — µS RESET OPTION JUMPER — ns The APD-32A025A has a 3-pin jumper (W1) for selecting the source of the RESET signal. For most applications, the + 40 — ns jumper should be set to INTERNAL by placing the shunt ns cy across the top 2 pins of the jumper. In some applications — ...
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... The master CPU transfer commands to the APD-32A025A by writing into memory location “0”. Immediately after receiving any command from the master CPU, the APD-32A025A will set the busy flag to “0” (data bus bit 3). The flag will remain “0” until the APD-32A025A has executed the given command. The master CPU can test the flag by reading memory location “ ...
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... D7 will go low and KB IRQ will go high. The APD-32A025A will scan a keyboard in one of two ways, the 16 key mode or the 64 key mode, which is programmable by command LKS (load keyboard status). Bounce time is 16 msec max and closure time is 48 msec min. Maximum rate is 10 depressions per second ...
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... Note that if three keys are depressed simultaneously to form and “L” configuration, an erroneous input could occur. If this presents a potential problem, a diode (IN914) should be added to the column pole of each switch. Document Number: 37081 Revision 24-May- DECODER KEYBOARD WITH COMMON POLE APD-32A025A Vishay Dale www.vishay.com 17 ...
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... After the master CPU issues a command to the APD-32A025A, the APD-32A025A will reset its busy flag to 0. That flag (data bit 3) can be tested by the master CPU as described earlier. When the APD-32A025A has finished execution of the command, the flag will be set to 1 and the master CPU can issue the next command ...
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... Output register content at the end of GKA instruction. key address Output register content at the end of GDM instruction. ASCII code APD-32A025A Vishay Dale 224 225 226 227 228 0 1 ...
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... LCR Load Cursor and Read Display 150µ The operand D0-D4 is loaded into the APD-32A025A’s cursor register, and the character addressed by the cursor is loaded into the output register LDL Load Display length 100µ ...
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... The APD-32A025A’s display status register is loaded by this instruction. Bit ”e” switches display on/off. Bit “d” when logical 1 will cause the entire display to blink at approximately 1 Hz. Bit “c” allows the cursor to blink beneath the character displayed in cursor position. Bit “ ...
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... LDS Note command is issued during the time the APD-32A025A is executing the previous command (Busy Flag = 0), the second command could cause an error condition. Therefore recommended that the busy flag always be tested before issuing any command. www.vishay.com 22 010 011 ...
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... The data (ASCII) can be loaded by a LDM (load display memory) command. A simple method is to load the master CPU accumulator with the desired ASD = CII code, with D6 and D7 set to zero, and output it to the APD-32A025A. The character will be loaded and displayed at the current cursor position. ...
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... Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right ...