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Preface
The H8/300L Series of single-chip microcomputers has the high-speed H8/300L CPU at its core,
with many necessary peripheral functions on-chip. The H8/300L CPU instruction set is compatible
with the H8/300 CPU.
The H8/3857 Group has the following on-chip peripheral functions required for system
configuration: a maximum 1,280-dot display LCD controller, four types of timers, a 14-bit PWM,
a 2-channel serial communication interface, and an 8-channel A/D converter.
The H8/3854 Group has the following on-chip peripheral functions required for system
configuration: a maximum 640-dot display LCD controller, three types of timers, a single-channel
serial communication interface, and a 4-channel A/D converter.
Both series can be used as embedded microcomputers in systems requiring LCD display.
The H8/3857, H8/3856, H8/3855, H8/3854, H8/3853, and H8/3852 are available in mask ROM
versions, and the H8/3857 and H8/3854 are also available in an F-ZTAT™* version which allows
programs to be written after the chip is mounted on a board.
Note: * F-ZTAT (Flexible Zero Turn-Around Time) is a trademark of Renesas Technology
Corp.
This manual describes the hardware of the H8/3857 Group and H8/3854 Group. For details on the
H8/3857 Group and H8/3854 Group instruction set, refer to the H8/300L Series Software Manual.
Rev.3.00 Jul. 19, 2007 page v of xxiv
REJ09B0397-0300
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