M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 523

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

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External Buses
5.1 Overview of External Buses
Table 5.1.1. Memory space expansion mode and memory spaces
Memory and I/O external expansion can be attained in either the memory expansion mode or the micro-
processor mode. When accessing an external area in either mode, 8-bit data bus width or 16-bit data bus
width can be selected, based on the BYTE pin level. 16-bit width is used to access an internal area,
regardless of the level of the BYTE pin.
Fix the BYTE pin either to “H” or “L” level. 8-bit and 16-bit data bus widths cannot be used together in an
external area.
Addresses (A
(CS0 through CS3) which indicate areas resulting from dividing a 1M bytes space into four, can be output
in both the memory expansion mode and microprocessor mode.
_______
Expansion mode 1
Expansion mode 2
Expansion mode
Normal mode
0
_______
through A
19
) for accessing a memory space of up to 1M bytes, as well as chip selects
Accesible memory space
Up to 1.2M byte
Up to 1M byte
Up to 4M byte
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Mitsubishi microcomputers
M16C / 62 Group