Sharp SM3514 Datasheet
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etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
DESCRIPTION
The SM3514 is a CMOS 4-bit single-chip microcomputer for databank incorporating data memory
RAM, LCD driver, key input circuits and buzzer output circuit. By connecting an external crystal, a 1 Hz
timer interrupt is made possible for easier clock
function.
FEATURES
• ROM capacity :
Program ROM 8 k x 23 bits
Character ROM 5 x 8 x 128 bits
• RAM capacity :
Working RAM 256 x 4 bits
Display RAM 60 x 8 bits
Data RAM 512 x 8 bits
• LCD display : 60 - segment x 8 - common
• I/O ports :
Buzzer output 1 bit (4 kHz)
Key input 7 bits
• Standby release : 2 events (2 Hz signal, key input)
• Built-in oscillator :
• Instruction cycle time : 10 µs
• Operating temperature : –10 to +60°C
• Supply voltage : 2.5 to 3.4 V
• Package : 100-pin QFP (QFP100-P-1420)
SM3514
SM3514
4-Bit Single-Chip Microcomputer
(For Data Bank Use)
System clock (built-in CR oscillator) 300 kHz
Timer (built-in CR oscillator) 32.8 kHz
(external crystal)
32.768 kHz
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SM3514
SYSTEM COMFIGURATION EXAMPLE
Key matrix
S1-S6
S53-S60
(MAX. 84-Key)
S1-S60
KI2-KI7
XCR
ON
Key
RESET
Key
KI1 VCC TEST RESET XI XO BZ
H
1-H8
VCC
3V
Buzzer
VCC
SM3514
Common signal
Segment signal
+
–
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