EZ80190AZ050SC00TR Zilog, EZ80190AZ050SC00TR Datasheet - Page 70
EZ80190AZ050SC00TR
Manufacturer Part Number
EZ80190AZ050SC00TR
Description
IC EZ80 ACCLAIM 50MHZ 100LQFP
Manufacturer
Zilog
Datasheet
1.EZ80190AZ050SG.pdf
(221 pages)
Specifications of EZ80190AZ050SC00TR
Processor Type
eZ80
Features
High Speed, Single-Cycle Instruction-Fetch
Speed
50MHz
Voltage
3.3V
Mounting Type
Surface Mount
Package / Case
100-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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RAM Control Registers
PS006614-1208
RAM Control Register
Table 21. RAM Control Register
RAM Address Upper Byte Register
Table 22. RAM Address Upper Byte Register
Bit
Position
7
GPRAM_EN
6
MACRAM_EN
[5:0]
Bit
Reset
CPU Access
Note: R/W = Read/Write.
Bit
Reset
CPU Access
Note: R/W = Read/Write.
The internal RAM spaces, data RAM and Multiply-Accumulator RAM, can be enabled by
setting corresponding bits in this register.
The RAM_ADDR_U register defines the upper byte of the address for the two on-chip
RAM blocks—general-purpose RAM and MACC RAM. If either or both of these on-chip
RAM blocks are enabled, their addresses assume priority over any Chip Selects. The
external Chip Select signals are not asserted if the corresponding RAM address is enabled.
Value
0
1
0
1
000000 Reserved
R/W
R/W
Description
On-chip general-purpose RAM is disabled.
On-chip general-purpose RAM is enabled.
On-chip multiply-accumulator RAM is disabled.
On-chip multiply-accumulator RAM is enabled.
7
0
7
0
R/W
R/W
6
0
6
0
R/W
R
5
0
5
0
R/W
R
4
0
4
0
(RAM_CTL = B4h)
R/W
R
3
0
3
0
(RAM_ADDR_U = B5h)
R/W
R
2
0
2
0
Product Specification
Random Access Memory
R/W
R
1
0
1
0
R/W
R
0
0
0
0
eZ80190
60
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