ez80f91 ZiLOG Semiconductor, ez80f91 Datasheet - Page 103

• Manufacturer Part Number: ez80f91
• Description: Ez80 Acclaimplus!? Connectivity Assp Ez80f91 Assp
• Manufacturer: ZiLOG Semiconductor

PS027001-0707
RAM Address Upper Byte Register
The RAM_ADDR_U register defines the upper byte of the address for on-chip RAM.
If enabled, RAM addresses assume priority over all Chip Selects. The external Chip Select
signals are not asserted if the corresponding RAM address is enabled. See
Table 33. RAM Address Upper Byte Register
Bit
Reset
CPU Access
Note: R/W = Read/Write.
Bit
Position
[7:0]
RAM_ADDR_U
Value Description
00h–
FFh
This byte defines the upper byte of the RAM address. When
enabled, the general-purpose RAM address space ranges from
{RAM_ADDR_U, E000h} to {RAM_ADDR_U, FFFFh}. When
enabled, the EMAC RAM address space ranges from
{RAM_ADDR_U, C000h} to {RAM_ADDR_U, DFFFh}.
R/W
7
1
R/W
6
1
R/W
5
1
R/W
4
1
(RAM_ADDR_U = 00B5h)
R/W
3
1
Product Specification
Random Access Memory
R/W
2
1
eZ80F91 ASSP
Table
R/W
1
1
33.
R/W
0
1
95