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15.2
Overview
15.2.1
Block Diagram
FLMCR1
FLMCR2
RAMER
Legend
FLMCR1:
Flash memory control register 1
FLMCR2:
Flash memory control register 2
EBR1:
Erase block register 1
EBR2:
Erase block register 2
RAMER:
RAM emulation register
Notes: 1.
Functions as the FWE pin in the flash memory version, and as the RESO pin in the
mask ROM version.
2.
The registers that control the flash memory (FLMCR1, FLMCR2, EBR1, EBR2,
and RAMER) are for use exclusively by the flash memory version, and are not
provided in the mask ROM version. Reads to the corresponding addresses in the
mask ROM version will always return 1, and writes to these addresses are invalid.
434
Internal address bus
Internal data bus (16 bits)
2
*
2
*
Bus interface/controller
2
*
EBR1
2
*
EBR2
2
*
Figure 15-1 Block Diagram of Flash Memory
Flash memory
(256 kbytes)
Operating
FWE pin
mode
Mode pin
1
*
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