ez80190 ZiLOG Semiconductor, ez80190 Datasheet - Page 172

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

PS006613-0306
Bit
Position
1
IGN_LOW_0
0
SINGLE_STEP
Bit
Reset
CPU Access
Note: X = Undefined; W = Write.
Bit
Position
[7:0]
ZDI_WR_L,
ZDI_WR_H,
or
ZDI_WR_L
ZDI Write Data Registers
Three registers are used in the ZDI Write Only register address space to store the
data that is written when a write instruction is sent to the ZDI Read/Write Control
register (ZDI_RW_CTL). The ZDI Read/Write Control register, indicated in
Table
registers, in
{ZDI_WR_U, ZDI_WR_H, ZDI_WR_L} and the write command in one data trans-
fer operation.
86, is located at ZDI address
(ZDI_WR_U = 13h, ZDI_WR_H = 14h, ZDI_WR_L = 15h)
Value Description
0
1
0
1
Table
Value Description
00h–
FFh
The Ignore the Low byte function of the ZDI Address Match 1
registers is disabled. If BRK_ADDR0 is set to 1, ZDI initiates a
break when the entire 24-bit address, ADDR[23:0], matches
the 3-byte value {ZDI_ADDR0_U, ZDI_ADDR0_H,
ZDI_ADDR0_L}.
The Ignore the Low byte function of the ZDI Address Match 1
registers is enabled. If the BRK_ADDR1 is set to 0, ZDI
initiates a break when only the upper 2 bytes of the 24-bit
address, ADDR[23:8], match the 2 bytes value
{ZDI_ADDR0_U, ZDI_ADDR0_H}. As a result, a break can
occur anywhere within a 256-byte page.
ZDI SINGLE STEP mode is disabled.
ZDI SINGLE STEP mode is enabled. ZDI asserts a break
following execution of each instruction.
Table 85. ZDI Write Data Registers
W
X
7
85. As a result, the ZDI master is allowed to write the data to
These registers contain the data that is written during
execution of a write operation defined by the
ZDI_RW_CTL register. The 24-bit data value is stored as
{ZDI_WR_U, ZDI_WR_H, ZDI_WR_L}. If less than 24 bits
of data are required to complete the required operation,
the data is taken from the least significant byte(s).
W
X
6
PRELIMINARY
W
X
5
16h
immediately following the ZDI Write Data
W
X
4
W
X
3
eZ80190 Product Specification
W
X
2
W
X
1
ZiLOG Debug Interface
W
X
0
158