M16C Datasheet, PDF (230/262 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
Parallel I/O Mode
The parallel I/O mode is entered by making connections shown in Figure 24-2 and then turning the Vcc power
supply (3.3 V) on. In this mode, the M16C/6N (with on-chip flash memory) operates in a manner similar to the
DINOR flash memory M5M29FB800 by Mitsubishi. Note, however, that there are some differences in regard
to the functions not available with the microcomputer and matters related to memory size, as shown in Table
24-1.
Only in parallel I/O mode, the M16C/6N (with on-chip flash memory), either 5V- or 3.3V version, needs to be
operated with a supply voltage of 3.3 V + 0.3 V. Table 24-2 shows pin relationship between the M16C/6N and
M5M29FB800 in parallel I/O mode.
Table 24-1. Differences from the M5M29FB800
Functions not available with microcomputer Differences in matters related to memory capacity
• Device ID code readout
• Flash memory capacity
• Suspend/resume functions
• Block arrangement (See Figure CC-1)
• Sleep function
Functions only available with microcomputer
• Additional write function
• Boot ROM area selection
Note: Do not apply VHH (12 V) to the A9 and RP pins.
Table 24-2. Pin relationship in parallel I/O mode
M16C/62(on-chip flash memory)
VCC
VSS
VCC
VSS
Address input
P21 to P27,
P30 to P37, P40, P41, P42
M5M29FB800
VCC
VSS
A0 to A16
Data I/O
OE input
CE input
WP input
WE input
BYTE input
RP input
RY/BY output
BSEL input (Note)
P00 to P07, P10 to P17
P51
P50
P53
P52
BYTE
NMI
P70
P54
D0 to D15
OE
CE
WP
WE
BYTE
RP
RY/BY
Note: BSEL is used to choose between the user ROM and boot ROM areas and has no
equivalent pin in the M5M29FB800.
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