MITSUBISHI MICROCOMPUTERS
M37905F8CFP, M37905F8CSP
16-BIT CMOS MICROCOMPUTER
DESCRIPTION
<Flash memory mode>
These are single-chip 16-bit microcomputers designed with high-per-
formance CMOS silicon gate technology, including the internal flash
memory and, being packaged in 64-pin plastic molded QFP or shrink
plastic molded DIP. These microcomputers support the 7900 Series
instruction set, which are enhanced and expanded instruction set
and are upper-compatible with the 7700/7751 Series instruction set.
The CPU of these microcomputers is a 16-bit parallel processor that
can also be switched to perform 8-bit parallel processing. Also, the
bus interface unit of these microcomputers enhances the memory
access efficiency to execute instructions fast. Therefore, these mi-
crocomputers are suitable for office, business, and industrial equip-
ment controller that require high-speed processing of large data.
Also, they are suitable for motor-control equipment since each of
them includes the motor control circuit.
Power supply voltage .................................................. 5 V ± 0.5 V
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Programming/Erase voltage ........................................ 5 V ± 0.5 V
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Programming method .................... Programming in a unit of word
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Erase method ............................................Block erase or Total erase
M37905F8CFP, M37905F8CSP
............... 4 blocks (8 Kbytes ✕ 2, 16 Kbytes ✕ 1, 28 Kbytes ✕ 1)
Programming/Erase control by software command
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Maximum number of reprograms ............................................ 100
APPLICATION
Control devices for office equipment such as copiers and facsimiles
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Control devices for industrial equipment such as communication
and measuring instruments
For the internal flash memory, single-power-supply programming
and erasure, using a PROM programmer or the control by the cen-
tral processing unit (CPU), is supported. Also, each of these micro-
computers has the memory area dedicated for storing a certain
software which controls programming and erasure (reprogramming
control software). Therefore, on these microcomputers, the program
can easily be changed even after they are mounted on the board.
Control devices for equipment, requiring motor control, such as
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inverter air conditioners and general-purpose inverters
DISTINCTIVE FEATURES
<Microcomputer mode>
Number of basic machine instructions .................................... 203
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Memory
Flash memory (User ROM area) ................................... 60 Kbytes
RAM .............................................................................3072 bytes
Flash memory (Boot ROM area) ..................................... 8 Kbytes
Instruction execution time
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The fastest instruction at 20 MHz frequency ........................ 50 ns
Single power supply .................................................... 5 V ± 0.5 V
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Interrupts ........... 8 external sources, 23 internal sources, 7 levels
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Multi-functional 16-bit timer ................................................. 10 + 3
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(Three-phase motor drive waveform or Pulse motor drive waveform
output is available.)
Serial I/O (UART or Clock synchronous)..................................... 3
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10-bit A-D converter .......................................... 12-channel inputs
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8-bit D-A converter ............................................2-channel outputs
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12-bit watchdog timer
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Programmable input/output (ports P1, P2, P4, P5, P6, P7, P8)......50
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RENESAS [ RENESAS TECHNOLOGY CORP ]
