ez80190 ZiLOG Semiconductor, ez80190 Datasheet - Page 179

• Manufacturer Part Number: ez80190
• Description: Ez80190 Microprocessor
• Manufacturer: ZiLOG Semiconductor

PS006613-0306
Bit
Reset
CPU Access
Note: R = Read Only.
Bit
Position
[7:0]
ZDI_RD_L,
ZDI_RD_H,
or
ZDI_RD_U
Bit
Reset
CPU Access
Note: R = Read Only.
Bit
Position
[7:0]
ZDI_RD_MEM
ZDI Read Memory Data Value Register
When a read is executed from the ZDI Read Memory Data Value register, indi-
cated in
currently pointed to by the program counter, PC, and the program counter is incre-
mented. In Z80 mode, the memory address is {MBASE, PC[15:0]}. In ADL mode,
the memory address is PC[23:0]. Refer to the eZ80
information regarding Z80 and ADL MEMORY modes. The program counter, PC,
increments after each data read. However, the ZDI register address does not
increment automatically when this register is accessed. As a result, the ZDI mas-
ter can read any number of data bytes from this address one time, then continue
to any number of 8-bit data bytes.
(ZDI_RD_MEM = 20h in ZDI Register Read Only Address Space)
(ZDI_RD_L = 10h, ZDI_RD_H = 11h, ZDI_RD_U = 12h)
Table 93. ZDI Read Registers—Low, High and Upper
Table
Table 94. ZDI Read Memory Data Value Register
Value Description
00h–
FFh
Value Description
00h–
FFh
94, the eZ80190 device fetches the data from the memory address
R
R
7
0
7
0
Values read from the memory location as requested by
the ZDI Read Control register during a ZDI read
operation. The 24-bit value is stored in {ZDI_RD_U,
ZDI_RD_H, ZDI_RD_L}.
8-bit data read from the memory address indicated by the
CPU’s program counter. In Z80 mode, 8-bit data
transferred out
data transferred out
R
R
6
0
6
0
PRELIMINARY
R
R
5
0
5
0
←
({MBASE, SPS}). In ADL mode, 8-bit
←
R
R
4
0
4
0
(SPL).
R
R
3
0
3
0
eZ80190 Product Specification
®
CPU User Manual for more
R
R
2
0
2
0
R
R
1
0
1
0
ZiLOG Debug Interface
R
R
0
0
0
0
165