ez80f92 ZiLOG Semiconductor, ez80f92 Datasheet - Page 206

• Manufacturer Part Number: ez80f92
• Description: Ez80acclaim Flash Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS015313-0508
Table 114. Flash Data Register; (FLASH_DATA = 00F6h)
Flash Address Upper Byte Register
The FLASH_ADDR_U register defines the upper 7 bits of the address for Flash memory.
Changing the value of FLASH_ADDR_U allows the on-chip 128 KB/64 KB Flash
memory to be mapped to any location within the 16 MB linear address space of the
eZ80F92 device. If the on-chip Flash memory is enabled, Flash address assumes priority
over any external Chip Selects. The external Chip Select signals are not asserted if the
corresponding Flash address is enabled. The internal Flash memory does not hold priority
over internal SRAM.
Table 115. Flash Address Upper Byte Register; (FLASH_ADDR_U = 00F7h)
Bit
Reset
CPU Access
Note: R/W = Read/Write.
Bit
Position
[7:0]
FLASH_DATA
Bit
Reset
CPU Access
Note: R/W = Read/Write; R = Read Only.
Bit
Position
[7:1]
FLASH_ADDR_U
0
Value Description
00h–
FFh
Value Description
00h–
FEh
0
R/W
Data value to be written to Flash during an I/O Write operation.
R/W
X
7
7
0
These bits define the upper byte of the Flash address. When
on-chip Flash is enabled, the Flash address space begins at
address {FLASH_ADDR_U, 0b, 0000h}. On-chip Flash is
prioritized over all external Chip Selects.
Reserved (enforces alignment on a 128 KB boundary).
R/W
R/W
X
6
6
0
R/W
R/W
X
5
5
0
R/W
R/W
X
4
4
0
R/W
R/W
X
3
3
0
Product Specification
R/W
R/W
X
2
2
0
eZ80F92/eZ80F93
R/W
R/W
X
1
1
0
Flash Memory
R/W
X
R
0
0
0
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