HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 430

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

Section 16 ROM
16.1
Overview
The SH7020 microcomputer has 16 kbytes of on-chip ROM (mask ROM). The SH7021
microcomputer has 32 kbytes of on-chip ROM (mask ROM or PROM). The on-chip ROM is
connected to the CPU and the direct memory access controller (DMAC) through a 32-bit data bus
(figure 16.1). The CPU can access the on-chip ROM in 8-, 16- and 32-bit widths and the DMAC
can access the ROM in 8- and 16-bit widths. Data in the on-chip ROM can always be accessed in
one cycle.
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