EZ80F91MCU Datasheet, PDF (327/396 Pages) Zilog, Inc. – eZ80Acclaim-TM Flash Microcontrollers

eZ80F91 MCU
Product Specification
308
ZDI Read Register Low, High, and Upper
The ZDI register Read Only address space offers Low, High, and Upper functions,
which contain the value read by a Read operation from the ZDI Read/Write Con-
trol register (ZDI_RW_CTL). This data is valid only while in ZDI BREAK mode and
only if the instruction is read by a request from the ZDI Read/Write Control regis-
ter. See Table 200.
Table 200. ZDI Read Register Low, High and Upper
(ZDI_RD_L = 10h, ZDI_RD_H = 11h, and ZDI_RD_U = 12h
in the ZDI Register Read Only Address Space)
Bit
Reset
CPU Access
Note: R = Read Only.
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
R
R
R
R
R
R
R
R
Bit
Position
[7:0]
ZDI_RD_L,
ZDI_RD_H,
or
ZDI_RD_U
Value Description
00h–
FFh
Values read from the memory location as requested by
the ZDI Read Control register during a ZDI Read
operation. The 24-bit value is supplied by {ZDI_RD_U,
ZDI_RD_H, ZDI_RD_L}.
PS019209-0504
PRELIMINARY
ZiLOG Debug Interface