Datasheet

Section 21 RAM
R01UH0309EJ0500 Rev. 5.00 Page 1143 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
Section 21 RAM
This LSI has an on-chip high-speed static RAM. The RAM is connected to the CPU by a 16-bit
data bus, enabling one-state access by the CPU to both byte data and word data.
The on-chip RAM can be enabled or disabled by means of the RAME bit in the system control
register (SYSCR). For details on the system control register (SYSCR), see section 3.2.2, System
Control Register (SYSCR).
Product Type ROM Type
RAM
Capacity RAM Address
H8S/24569 R4F24569 Flash memory version 64 Kbytes
H8S/24569R R4F24569R
H8S/24549 R4F24549
H'FEC000 to H'FFBFFF
H8S/24568 R4F24568 48 Kbytes
H8S/24568R R4F24568R
H8S/24565 R4F24565
H8S/24565R R4F24565R
H8S/24548 R4F24548
H8S/24545 R4F24545
H'FF0000 to H'FFBFFF
H8S/24562 R4S24562 ROM-less version 64 Kbytes
H8S/24562R R4S24562R
H8S/24542 R4S24542
H'FEC000 to H'FFBFFF
H8S/24561 R4S24561 48 Kbytes
H8S/24561R R4S24561R
H8S/24541 R4S24541
H'FF0000 to H'FFBFFF