Sharp SM3513 Datasheet
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SM3513
DESCRIPTION
The SM3513 is a CMOS 4-bit single-chip microcomputer for databank incorporating data memory
RAM, LCD driver (the output is adjustable in 16
steps for various contrast), key/switch input circuit,
8-bit parallel I/O port, 3 output ports, external memory control circuit, buzzer circuit and voltage detector circuit. One of three ports contains special output circuit for infrared (IR) communication. It is easy
to realize timer function by timer signal interrupt
since the oscillator circuit is built-in.
FEATURES
• ROM capacity :
Program ROM 24 k x 23 bits
Character ROM 6 x 8 x 256 bits
Constant ROM 1 k x 4 bits
• RAM capacity :
Working RAM 256 x 4 bits
Display RAM 74 x 32 bits
Data RAM 512 x 8 bits
• Memory expansion (external) : 16 M x 8 bits x 4
• Buil-in battery detector
• LCD display : 74 - segment x 32 -common
• I/O ports :
Parallel I/O 8 bits
Input 2 bits
Output 3 bits
Buzzer output 1 bit (4 kHz)
Key input 6 bits
• Standby release : 2 events (Timer signal, key input)
• LCD contrast adjustable : 16 levels
• Built-in oscillator :
• Instruction cycle time : 3 µs
• Operating temperature : –10 to +60°C
• Supply voltage : 3.8 to 6.0 V
• Package : 160-pin QFP (QFP160-P-2828)
[Test Sample only]
SM3513
4-Bit Single-Chip Microcomputer
(For Data Bank Use)
System clock (built-in CR oscillator) 1 MHz
(external ceramic resonator) 1 MHz
Timer (built-in CR oscillator) 32.8 kHz
(external crystal)
32.768 kHz
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SM3513
SYSTEM COMFIGURATION EXAMPLE
S1-S8
S9-S32
S67-S74
S1-S74
CE1-CE4
KI1-KI7
DIO1-DIO8
RW
CE
KI
8 VCC TEST RESET CXI CXOCCI CCO BZ
H
1-H32
EO2
Reference
voltage
V
CC
Buzzer
SM3513
RESET
key
6V
SW
(HIGH END DATA BANK)
LCD • CTRL
LCD SYNC
VREF
V
4
V3
V2
V1
VH
VCC
φ
Expand
memory
16 M−byte x 4
Key matrix
(MAX.112-key)
Infrared signal
for IR communication
Common signal
Segment signal
+
–
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