SM3513

• 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 :
          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
• Instruction cycle time : 3 µs
• Operating temperature : 10 to +60
• Supply voltage : 3.8 to 6.0 V
• Package : 160-pin QFP (QFP160-P-2828)
                                        [Test Sample only]

The SM3513 is a CMOS 4-bit single-chip micro-computer 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 mem-ory control circuit, buzzer circuit and voltage detec-tor circuit. One of three ports contains special out-put circuit for infrared (IR) communication. It is easy to realize timer function by timer signal interrupt since the oscillator circuit is built-in.