M16C Datasheet, PDF (234/262 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Preliminary Specifications REV.B
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M16C / 6N Group
Parallel I/O Mode
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Bus Operation Modes
Read
The Read mode is entered by pulling the OE pin low when the CE pin is low and the WE- as well as RP
pins are high. There are three read modes: Array, Status Register and Lock Bit Status which are selected
by software command input. In Read mode, the data corresponding to each software command entered
are output from the data I/O pins D0 – D15. The Read Array mode is automatically selected when the device
is powered on after it exits Deep Power Down mode.
Output Disable
The Output Disable mode is entered by pulling the CE pin low and the WE-,OE- and RP pins high. Also,
the data I/O pins are placed in the high-impedance state.
Standby
The Standby mode is entered by driving the CE pin high when the RP pin is high. Also, the data I/O pins
are placed in the high-impedance state. However, if the CE pin is set high during erase- or program
operation, the internal control circuit does not halt immediately and normal power consumption is required
until the operation under way is completed.
Write
The Write mode is entered by pulling the WE pin low when the CE pin is low and the OE- as well as RP
pins are high. In this mode, the device accepts the software commands or write data entered from the data
I/O pins. A program-, erase- or some other operation is initiated depending on the content of the software
command entered here. The input data such as addresses and software command are latched at the rising
edge of WE or CE whichever occurs earlier.
Deep Power Down
The Deep Power Down is entered by pulling the RP pin low. Also, the data I/O pins are placed in the high-
impedance state. When the device is freed from Deep Power Down mode, the Read Array mode is
selected and the content of the status register is set to "8016". If the RP pin is pulled low during erase- or
program operation, the operation under way is cancelled and the data in the relevant block becomes
invalid.
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