EZ80L92MCU Datasheet, PDF (193/241 Pages) Zilog, Inc. – eZ80Acclaim Flash Microcontrollers

eZ80L92 MCU
Product Specification
178
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.
Table 99. ZDI Write Memory Register (ZDI_WR_MEM = 30h in the ZDI Register Write-
Only Address Space)
Bit
7
6
5
4
3
2
1
0
Reset
X
X
X
X
X
X
X
X
CPU Access
W
W
W
W
W
W
W
W
Note: X = Undefined; W = Write.
Bit
Position
[7:0]
zdi_wr_mem
Value Description
00h–
FFh
The 8-bit data that is transferred to the ZDI slave following
a Write to this address is written to the address indicated
by the current program counter. The program counter is
incremented following each 8 bits of data. In Z80
MEMORY mode, ({MBASE, PC[15:0]}) ← 8 bits of
transferred data. In ADL MEMORY mode, (PC[23:0]) ← 8
bits of transferred data.
PS013012-1004
PRELIMINARY
ZiLOG Debug Interface