ez80l92 ZiLOG Semiconductor, ez80l92 Datasheet - Page 183

• Manufacturer Part Number: ez80l92
• Description: Ez80acclaim Flash Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS013014-0107
Table 98. Instruction Store 4:0 Registers (ZDI_IS4 = 21h, ZDI_IS3 = 22h,
ZDI_IS2 = 23h, ZDI_IS1 = 24h, and ZDI_IS0 = 25h in the ZDI Register Write-
Only Address Space)
ZDI Write Memory Register
A Write to the ZDI Write Memory register causes the eZ80L92 to write the 8-bit data to
the memory location specified by the current address in the program counter. In Z80
MEMORY mode, this address is {MBASE, PC[15:0]}. In ADL MEMORY mode, this
address is PC[23:0]. The program counter, PC, increments after each data Write. However,
the ZDI register address does not increment automatically when this register is accessed.
As a result, the ZDI master is allowed to write any number of data bytes by writing to this
address one time followed by any number of data bytes. See
Table 99. ZDI Write Memory Register (ZDI_WR_MEM = 30h in the ZDI
Register Write-Only Address Space)
Bit
Reset
CPU Access
Note: X = Undefined; W = Write.
Bit
Position
[7:0]
ZDI_IS4,
ZDI_IS3,
ZDI_IS2,
ZDI_IS1,
or
ZDI_IS0
Bit
Reset
CPU Access
Note: X = Undefined; W = Write.
00h–FFh These registers contain the Op Codes and operands
Value
W
W
X
X
7
7
Description
for immediate execution by the CPU following a Write
to ZDI_IS0. The ZDI_IS0 register contains the first Op
Code of the instruction. The remaining ZDI_ISx
registers contain any additional Op Codes or operand
dates required for execution of the required instruction.
W
W
X
X
6
6
W
W
X
X
5
5
W
W
X
X
4
4
W
W
X
X
3
Table
3
Product Specification
99.
W
W
X
X
2
2
ZiLOG Debug Interface
eZ80L92 MCU
W
W
X
X
1
1
W
W
X
X
0
0
177