The MC74HC245A is identical in pinout to the LS245. The device inputs are compatible with standard CMOS outputs; with pull−up resistors, they are compatible with LSTTL outputs. The HC245A is a 3−state noninverting transceiver that is used for 2−way asynchronous communication between data buses. The device has an active−low Output Enable pin, which is used to place the I/O ports into high−impedance states. The Direction control determines whether data flows from A to B or from B to A.
The RAM's working register area in data memory bank 0 is further divided into four register banks. Each register bank has eight 4-bit registers that are addressable either by 1-bit or 4-bit instructions. Paired 4-bit registers can be addressed as double registers by 8-bit instructions. Register A is the 4-bit accumulator and double register EA is the 8-bit extended accumulator. Double registers WX, WL, and HL are used as data pointers for indirect addressing. Unused working registers can be used as general-purpose memory. To limit the possibility of data corruption due to incorrect register bank addressing, register bank 0 is usually used by the main program and banks 1, 2, and 3 for interrupt service routines.
6. TUNE/SEEK/ATP (AUTO TUNING PRESET) CONTROL This button performs two functions: Auto Tuning Preset Scan and Auto Tuning Preset Memory. This function allows you to locate and store up to six stations in the selected band automatically. Select the desired band, then rotate the knob counterclockwise to select a station on a lower frequency or clockwise to select a station on a higher frequency. Hold the knob in either position for more than 0.5 seconds to begin automatic scanning. The tuner will locate and stop at the next receivable station. Auto Memory Scan Function Use this function to check the stations stored in memory. Press the ATP button to select the preset stations for five seconds each, beginning with the current station, Either press the ATP button again or press one of the preset buttons (1-6) to stop scanning. During the preset scan operation, the preset number flashes on the display.
Supplier
Vendor: PHQty: 8800
WELL-SOURCE COMPONENTS 
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Adddate: 2010-09-03
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Anduo Components Co.,Ltd 
We are an Chinese importer and broker of electronic components specialized in IC industry.
Wish could be the best business partners wih you in the 2007and wish our relationship could become better and better.
Our company office is in BeiJing China, and we also have branch company in the other cities of China.
We have our own inventory, nearly 20.000 kinds.We distribute brands such...
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Adddate: 2010-09-03
Vendor: NXP Pack: SOT404/TO-263/D2PAKD/C: 07+(pb-free)Qty: 15201Note: new in stock
HY (HK) IC LIMITED 
HY(HK) IC Limited specializes in supply all kinds of wordwide brands components which was found in 1998.We have established steady business relationships with many local suppliers and oversea customers. We have excellent engineers here and we are trying our best to provide high quality products with competitive price to our customer. We looking forward your enquiry!
Contact: Ms.Melody Chan
Adddate: 2010-09-03
Vendor: SOT404/TO-263/D2PAK Pack: 7850D/C: PHQty: 06+
KANSHEN (HONGKONG)INDUSTRIAL LIMITED 
Good day, friend!
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Adddate: 2010-09-03
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Singo(HK)technology Co.,Limited 
Singo (Hong Kong) Technology Co., Ltd. is a professional agent and distributor of electronic components involving various analog and digital components.The main brands cover IR, MAXIM, TI, ST, AOS, AD, ON, PHILIPS, FAIRCHILD, ALTERA, EMC,ILINX, MICROCHIP, FSC, HY, SAMSUNG, INTEL, EPSON, SPANSION,etc.
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Adddate: 2010-09-03
Vendor: PH Pack: SOT404/TO-263/D2PAKD/C: 05+/06+Qty: 8800
BC Semicon 
BC semicon is the principles of an expert component of import export - objectives and semiconductors. We have healthy products by millions of access to essential or network of global trading partneryou.
Maintains a multi - BC million to over 25,000 inventory selling electronics and 5,000 different take inventory is maintained the competition is returned, HKinventory online at IC and a Broker ...
Contact: Mr.Eric Zhu
Adddate: 2010-09-03
Vendor: PHILIPS Pack: TO-220 ABQty: 5000
HuiFeng Electronics 
Contact: Ms.CAI
Adddate: 2010-09-03
Vendor: PHILIPS Pack: TO-220 ABQty: 5000
HuiFeng Electronics 
Contact: Ms.CAI
Adddate: 2010-09-03
Vendor: PHILIPS Pack: TO-220 ABQty: 5000
HuiFeng Electronics 
Contact: Ms.CAI
Adddate: 2010-09-03