Datasheet

Section 1 Overview
Page 2 of 1408 R01UH0309EJ0500 Rev. 5.00
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
Table 1.1 Overview of Specifications
Type
Module/
Function Description
ROM
• Flash memory version
⎯ User ROM: 256 Kbytes and 128 Kbytes
⎯ Data flash: 8 Kbytes
• ROM-less version
Memory
RAM RAM size: 64 Kbytes and 48 Kbytes
CPU
• 16-bit high-speed H8S/2600 CPU (CISC type)
Upward-compatible with H8/300, H8/300H, and H8S CPUs on
an object level
• General register mode (Sixteen 16-bit general registers)
• Eight addressing modes
• Address space: 16 Mbytes
(program: 16 Mbytes, data: 16 Mbytes)
• Number of basic instructions
69 types (arithmetic and logic, multiply and divide, bit-
manipulation, and multiply-and-accumulate instructions)
• Minimum instruction execution time (ns)
30.3 ns when system clock φ = 33 MHz and Vcc = 3.0 to 3.6 V
(ADD instruction)
• Multiplier is included (16 × 16 → 32 bits)
• Multiply-and-accumulate instructions are supported (16 × 16 +
32 → 32 bits)
CPU
Operating mode Advanced mode