Datasheet

Section 21 ROM (Mask ROM Version, H8S/2138 F-ZTAT, H8S/2134 F-ZTAT, and H8S/2132 F-ZTAT)
Rev. 4.00 Jun 06, 2006 page 581 of 1004
REJ09B0301-0400
21.4.2 Block Diagram
Module bus
Bus interface/controller
Flash memory
(128 kbytes/64 kbytes)
Operating
mode
FLMCR2
Internal address bus
Internal data bus (16 bits)
Mode pins
EBR1
EBR2
FLMCR1
*
*
*
*
Legend:
FLMCR1: Flash memory control register 1
FLMCR2: Flash memory control register 2
EBR1: Erase block register 1
EBR2: Erase block register 2
Note: * These registers are used only in the flash memory version. In the mask ROM version,
a read at any of these addresses will return an undefined value, and writes are invalid.
Figure 21.2 Block Diagram of Flash Memory