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Advantages changing an H8/3437, H8/3337 & H8/3297 designs to H8S/21xx

Latest Updated:03/23/2009

Question:

What performance or power consumption advantages will I get changing an H8/3437, H8/3337 & H8/3297 designs to an H8S/21xx

Answer:

"The H8S/21xx series is based around a high performance CPU.  It is the same CPU found in the H8S/22xx & H8S/23xx 16 bit microcontrollers. This means that the general registers are increased from 16 bits to 32 bits. The program counter is increasedfrom 16 bits to 24 bits. This increases the possible allowable address range from 64 k to 16 Mbyte. This is how the H8S/21x4 devices support 128k of on chip code memory. The CPU executes instructions in a minimum of 1 cycle time, 50 ns @ 20 MHz.

Theclocking frequency is increased from 16 MHz to 20 MHz.

Module standby is introduced on these devices allowing the user to turn off any peripherals that arent being used. 6 power saving modes are offered on the H8S devices, an increase over the H8/300devices."

Suitable Products
H8S/2668
H8S/2655
H8S/2643
H8S/2633
H8S/2628
H8S/2615
H8S/2612
H8S/2437
H8S/2368
H8S/2398, 2357
H8S/2355
H8S/2350
H8S/2345
H8S/2282, 2280
H8S/2276
H8S/2258, 2239, 2238, 2237, 2227
H8S/2245
H8S/2215
H8S/2214
H8S/2199R
H8S/2194
H8S/2172
H8S/2168
H8S/2158
H8S/2140B
H8S/2114R
H8S/2111B
H8S/2110B