EZ80L92AZ020EC00TR Zilog, EZ80L92AZ020EC00TR Datasheet - Page 75
EZ80L92AZ020EC00TR
Manufacturer Part Number
EZ80L92AZ020EC00TR
Description
IC EZ80 MPU 100LQFP
Manufacturer
Zilog
Datasheet
1.EZ80L92AZ020SG.pdf
(231 pages)
Specifications of EZ80L92AZ020EC00TR
Processor Type
eZ80
Features
High Speed, Single-Cycle Instruction-Fetch
Speed
20MHz
Voltage
3.3V
Mounting Type
Surface Mount
Package / Case
100-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
EZ80L92AZ020EC00T
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PS013014-0107
Chip Select x Upper Bound Registers
For Memory Chip Selects, the Chip Select x Upper Bound registers, detailed in
defines the upper bound of the address range for which the corresponding Chip Select (if
enabled) can be active. For I/O Chip Selects, this register produces no effect. The reset
state for the Chip Select 0 Upper Bound register is
Chip Select upper bound registers is
Table 23. Chip Select x Upper Bound Registers (CS0_UBR = 00A9h,
Bit
CS0_UBR Reset
CS1_UBR Reset
CS2_UBR Reset
CS3_UBR Reset
CPU Access
Note: R/W = Read/Write.
Bit
Position
[7:0]
CSx_UBR
CS1_UBR = 00ACh, CS2_UBR = 00AFh, CS3_UBR = 00B2h)
00h–FFh
Value
R/W
7
1
0
0
0
Description
For Memory Chip Selects (CSx_IO = 0)
This byte specifies the upper bound of the Chip Select
address range. The upper byte of the address bus,
ADDR[23:16], is compared to the values contained in
these registers for determining whether a Chip Select
signal should be generated.
For I/O Chip Selects (CSx_IO = 1)
No effect.
R/W
6
1
0
0
0
00h
.
R/W
5
1
0
0
0
FFh
R/W
4
1
0
0
0
, while the reset state for the other
R/W
3
1
0
0
0
Chip Selects and Wait States
Product Specification
R/W
2
1
0
0
0
eZ80L92 MCU
R/W
1
1
0
0
0
Table
R/W
0
1
0
0
0
23,
69
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