ez80f91 ZiLOG Semiconductor, ez80f91 Datasheet - Page 102

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

PS027001-0707
RAM Control Registers
select address space, the memory chip select is not activated. On-chip RAM is not accessi-
ble to external devices during bus acknowledge cycles.
RAM Control Register
Internal general purpose RAM is disabled by clearing the GPRAM_EN bit. The default on
RESET is for general purpose RAM to be enabled. See
Table 32. RAM Control Register (RAM_CTL = 00B4h)
Bit
Reset
CPU Access
Note: R/W = Read/Write; R = Read Only.
Bit
Position
7
GPRAM_EN
6
ERAM_EN
[5:0]
Value
0
1
0
1
000000
R/W
7
1
Description
On-chip general-purpose RAM is disabled.
On-chip general-purpose RAM is enabled.
On-chip EMAC RAM is disabled.
On-chip EMAC RAM is enabled.
Reserved
R/W
6
1
R
5
0
R
4
0
Table
R
3
0
32.
Product Specification
Random Access Memory
R
2
0
eZ80F91 ASSP
R
1
0
R
0
0
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